./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/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_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 --- 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 13:54:54,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:54:54,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:54:54,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:54:54,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:54:54,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:54:54,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:54:54,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:54:54,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:54:54,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:54:54,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:54:54,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:54:54,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:54:54,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:54:54,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:54:54,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:54:54,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:54:54,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:54:54,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:54:54,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:54:54,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:54:54,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:54:54,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:54:54,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:54:54,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:54:54,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:54:54,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:54:54,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:54:54,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:54:54,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:54:54,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:54:54,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:54:54,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:54:54,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:54:54,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:54:54,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:54:54,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:54:54,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:54:54,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:54:54,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:54:54,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:54:54,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:54:54,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:54:54,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:54:54,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:54:54,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:54:54,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:54:54,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:54:54,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:54:54,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:54:54,907 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:54:54,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:54:54,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:54:54,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:54:54,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:54:54,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:54:54,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:54:54,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:54:54,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:54:54,911 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:54:54,911 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_05999e9f-a665-4650-812f-2570c79a599f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 [2022-12-13 13:54:55,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:54:55,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:54:55,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:54:55,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:54:55,120 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:54:55,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-12-13 13:54:57,687 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:54:57,877 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:54:57,878 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-12-13 13:54:57,887 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/data/faf859783/f1a789f8feae4f60ae2e46bac55ecc8a/FLAGac7b72e01 [2022-12-13 13:54:58,260 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/data/faf859783/f1a789f8feae4f60ae2e46bac55ecc8a [2022-12-13 13:54:58,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:54:58,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:54:58,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:54:58,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:54:58,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:54:58,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22742304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58, skipping insertion in model container [2022-12-13 13:54:58,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:54:58,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:54:58,506 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_05999e9f-a665-4650-812f-2570c79a599f/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-12-13 13:54:58,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:54:58,522 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:54:58,550 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_05999e9f-a665-4650-812f-2570c79a599f/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-12-13 13:54:58,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:54:58,575 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:54:58,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58 WrapperNode [2022-12-13 13:54:58,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:54:58,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:54:58,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:54:58,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:54:58,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,609 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2022-12-13 13:54:58,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:54:58,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:54:58,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:54:58,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:54:58,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:54:58,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:54:58,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:54:58,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:54:58,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (1/1) ... [2022-12-13 13:54:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:54:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:54:58,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:54:58,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05999e9f-a665-4650-812f-2570c79a599f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:54:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:54:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 13:54:58,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:54:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:54:58,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:54:58,691 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 13:54:58,784 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:54:58,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:54:59,067 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:54:59,208 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:54:59,208 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 13:54:59,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:54:59 BoogieIcfgContainer [2022-12-13 13:54:59,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:54:59,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:54:59,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:54:59,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:54:59,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:54:58" (1/3) ... [2022-12-13 13:54:59,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf4070f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:54:59, skipping insertion in model container [2022-12-13 13:54:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:54:58" (2/3) ... [2022-12-13 13:54:59,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf4070f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:54:59, skipping insertion in model container [2022-12-13 13:54:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:54:59" (3/3) ... [2022-12-13 13:54:59,216 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1.i [2022-12-13 13:54:59,229 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:54:59,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 13:54:59,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:54:59,285 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:54:59,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,351 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-12-13 13:54:59,351 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:54:59,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 301 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-12-13 13:54:59,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:54:59,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-12-13 13:54:59,395 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-12-13 13:54:59,395 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:54:59,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 301 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-12-13 13:54:59,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2022-12-13 13:55:05,051 INFO L134 LiptonReduction]: Checked pairs total: 5233 [2022-12-13 13:55:05,051 INFO L136 LiptonReduction]: Total number of compositions: 176 [2022-12-13 13:55:05,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:55:05,065 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@10058183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:55:05,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2022-12-13 13:55:05,067 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:55:05,067 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:05,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:05,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:05,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 31241, now seen corresponding path program 1 times [2022-12-13 13:55:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149690206] [2022-12-13 13:55:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:05,175 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 13:55:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149690206] [2022-12-13 13:55:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149690206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:05,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:05,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236809864] [2022-12-13 13:55:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:05,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:55:05,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:55:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:55:05,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 320 [2022-12-13 13:55:05,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 109 flow. Second operand has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:05,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 320 [2022-12-13 13:55:05,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:05,282 INFO L130 PetriNetUnfolder]: 99/218 cut-off events. [2022-12-13 13:55:05,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 218 events. 99/218 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 923 event pairs, 84 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 416. Up to 214 conditions per place. [2022-12-13 13:55:05,286 INFO L137 encePairwiseOnDemand]: 299/320 looper letters, 30 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2022-12-13 13:55:05,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 127 flow [2022-12-13 13:55:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:55:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:55:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-12-13 13:55:05,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2022-12-13 13:55:05,299 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-12-13 13:55:05,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-12-13 13:55:05,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:05,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-12-13 13:55:05,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,311 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,312 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 109 flow. Second operand 2 states and 255 transitions. [2022-12-13 13:55:05,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 127 flow [2022-12-13 13:55:05,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:55:05,316 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 67 flow [2022-12-13 13:55:05,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=67, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2022-12-13 13:55:05,320 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -19 predicate places. [2022-12-13 13:55:05,321 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 67 flow [2022-12-13 13:55:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:05,321 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:05,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:55:05,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 31239, now seen corresponding path program 1 times [2022-12-13 13:55:05,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:05,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863868328] [2022-12-13 13:55:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:05,407 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 13:55:05,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863868328] [2022-12-13 13:55:05,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863868328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:05,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:05,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722099320] [2022-12-13 13:55:05,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:05,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:05,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:05,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 320 [2022-12-13 13:55:05,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:05,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 320 [2022-12-13 13:55:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:05,500 INFO L130 PetriNetUnfolder]: 75/171 cut-off events. [2022-12-13 13:55:05,500 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:05,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 171 events. 75/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 675 event pairs, 63 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 344. Up to 166 conditions per place. [2022-12-13 13:55:05,502 INFO L137 encePairwiseOnDemand]: 318/320 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 13:55:05,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 123 flow [2022-12-13 13:55:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-12-13 13:55:05,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3375 [2022-12-13 13:55:05,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-12-13 13:55:05,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-12-13 13:55:05,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:05,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-12-13 13:55:05,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,508 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 67 flow. Second operand 3 states and 324 transitions. [2022-12-13 13:55:05,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 123 flow [2022-12-13 13:55:05,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:55:05,509 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 67 flow [2022-12-13 13:55:05,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-12-13 13:55:05,510 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -18 predicate places. [2022-12-13 13:55:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 67 flow [2022-12-13 13:55:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:05,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:55:05,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash 31238, now seen corresponding path program 1 times [2022-12-13 13:55:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:05,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510605370] [2022-12-13 13:55:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:05,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:05,561 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 13:55:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:05,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510605370] [2022-12-13 13:55:05,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510605370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:05,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:05,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109148876] [2022-12-13 13:55:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:05,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 320 [2022-12-13 13:55:05,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:05,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 320 [2022-12-13 13:55:05,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:05,642 INFO L130 PetriNetUnfolder]: 51/124 cut-off events. [2022-12-13 13:55:05,642 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:05,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 124 events. 51/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 441 event pairs, 42 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 251. Up to 119 conditions per place. [2022-12-13 13:55:05,643 INFO L137 encePairwiseOnDemand]: 318/320 looper letters, 27 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-12-13 13:55:05,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 121 flow [2022-12-13 13:55:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 13:55:05,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3302083333333333 [2022-12-13 13:55:05,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 13:55:05,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 13:55:05,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:05,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 13:55:05,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,650 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 67 flow. Second operand 3 states and 317 transitions. [2022-12-13 13:55:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 121 flow [2022-12-13 13:55:05,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:05,651 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 66 flow [2022-12-13 13:55:05,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-12-13 13:55:05,652 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -18 predicate places. [2022-12-13 13:55:05,652 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 66 flow [2022-12-13 13:55:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:05,653 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:55:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:55:05,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash 30046353, now seen corresponding path program 1 times [2022-12-13 13:55:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:05,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980664504] [2022-12-13 13:55:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:05,783 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 13:55:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:05,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980664504] [2022-12-13 13:55:05,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980664504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:05,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:05,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624180676] [2022-12-13 13:55:05,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:05,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:05,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:05,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:05,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 320 [2022-12-13 13:55:05,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:05,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 320 [2022-12-13 13:55:05,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:05,877 INFO L130 PetriNetUnfolder]: 49/118 cut-off events. [2022-12-13 13:55:05,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:05,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 118 events. 49/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 418 event pairs, 40 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 240. Up to 114 conditions per place. [2022-12-13 13:55:05,878 INFO L137 encePairwiseOnDemand]: 318/320 looper letters, 26 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 13:55:05,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 118 flow [2022-12-13 13:55:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2022-12-13 13:55:05,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3385416666666667 [2022-12-13 13:55:05,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2022-12-13 13:55:05,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2022-12-13 13:55:05,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:05,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2022-12-13 13:55:05,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,882 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 66 flow. Second operand 3 states and 325 transitions. [2022-12-13 13:55:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 118 flow [2022-12-13 13:55:05,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:05,883 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2022-12-13 13:55:05,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-12-13 13:55:05,884 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -18 predicate places. [2022-12-13 13:55:05,884 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2022-12-13 13:55:05,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:05,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:55:05,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:55:05,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash 30046352, now seen corresponding path program 1 times [2022-12-13 13:55:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:05,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238603815] [2022-12-13 13:55:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:05,942 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 13:55:05,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:05,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238603815] [2022-12-13 13:55:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238603815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:05,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:05,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583576187] [2022-12-13 13:55:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:05,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 320 [2022-12-13 13:55:05,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:05,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:05,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 320 [2022-12-13 13:55:05,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:06,026 INFO L130 PetriNetUnfolder]: 45/107 cut-off events. [2022-12-13 13:55:06,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:06,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 107 events. 45/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 361 event pairs, 36 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 219. Up to 104 conditions per place. [2022-12-13 13:55:06,027 INFO L137 encePairwiseOnDemand]: 317/320 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-12-13 13:55:06,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 111 flow [2022-12-13 13:55:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 13:55:06,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.328125 [2022-12-13 13:55:06,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 13:55:06,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 13:55:06,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:06,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 13:55:06,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,030 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 315 transitions. [2022-12-13 13:55:06,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 111 flow [2022-12-13 13:55:06,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:06,031 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2022-12-13 13:55:06,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-13 13:55:06,031 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -19 predicate places. [2022-12-13 13:55:06,032 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2022-12-13 13:55:06,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:06,032 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 13:55:06,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:55:06,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-13 13:55:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1190146514, now seen corresponding path program 1 times [2022-12-13 13:55:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:06,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933209349] [2022-12-13 13:55:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:55:06,040 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:55:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:55:06,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:55:06,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:55:06,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2022-12-13 13:55:06,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2022-12-13 13:55:06,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (39 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (38 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2022-12-13 13:55:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (31 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2022-12-13 13:55:06,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2022-12-13 13:55:06,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2022-12-13 13:55:06,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 66 remaining) [2022-12-13 13:55:06,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 66 remaining) [2022-12-13 13:55:06,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2022-12-13 13:55:06,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2022-12-13 13:55:06,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2022-12-13 13:55:06,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2022-12-13 13:55:06,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:55:06,072 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 13:55:06,074 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:55:06,074 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:55:06,122 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:55:06,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,156 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-12-13 13:55:06,157 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:55:06,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 794 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-12-13 13:55:06,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:55:06,161 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-12-13 13:55:06,190 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-12-13 13:55:06,190 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:55:06,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 794 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-12-13 13:55:06,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 27800 [2022-12-13 13:55:11,836 INFO L134 LiptonReduction]: Checked pairs total: 86645 [2022-12-13 13:55:11,836 INFO L136 LiptonReduction]: Total number of compositions: 235 [2022-12-13 13:55:11,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:55:11,838 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@10058183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:55:11,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2022-12-13 13:55:11,840 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:55:11,840 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:11,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:11,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:11,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash 49737, now seen corresponding path program 1 times [2022-12-13 13:55:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:11,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176249790] [2022-12-13 13:55:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:11,872 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 13:55:11,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176249790] [2022-12-13 13:55:11,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176249790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:11,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:11,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:11,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64915358] [2022-12-13 13:55:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:11,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 480 [2022-12-13 13:55:11,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:11,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:11,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 480 [2022-12-13 13:55:11,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:12,661 INFO L130 PetriNetUnfolder]: 5107/8670 cut-off events. [2022-12-13 13:55:12,661 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-12-13 13:55:12,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16631 conditions, 8670 events. 5107/8670 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 67871 event pairs, 4408 based on Foata normal form. 0/4572 useless extension candidates. Maximal degree in co-relation 10703. Up to 7843 conditions per place. [2022-12-13 13:55:12,699 INFO L137 encePairwiseOnDemand]: 446/480 looper letters, 69 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2022-12-13 13:55:12,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 330 flow [2022-12-13 13:55:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-12-13 13:55:12,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2022-12-13 13:55:12,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-12-13 13:55:12,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-12-13 13:55:12,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:12,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-12-13 13:55:12,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,704 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 256 flow. Second operand 3 states and 580 transitions. [2022-12-13 13:55:12,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 330 flow [2022-12-13 13:55:12,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 328 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 13:55:12,706 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 190 flow [2022-12-13 13:55:12,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2022-12-13 13:55:12,707 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -29 predicate places. [2022-12-13 13:55:12,707 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 190 flow [2022-12-13 13:55:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:12,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:12,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:55:12,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 49738, now seen corresponding path program 1 times [2022-12-13 13:55:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:12,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93515961] [2022-12-13 13:55:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:12,724 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 13:55:12,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:12,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93515961] [2022-12-13 13:55:12,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93515961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:12,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:12,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380828011] [2022-12-13 13:55:12,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:12,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:12,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:12,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 480 [2022-12-13 13:55:12,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:12,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 480 [2022-12-13 13:55:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:13,279 INFO L130 PetriNetUnfolder]: 3105/5492 cut-off events. [2022-12-13 13:55:13,279 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-12-13 13:55:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10530 conditions, 5492 events. 3105/5492 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40933 event pairs, 2639 based on Foata normal form. 0/3367 useless extension candidates. Maximal degree in co-relation 10522. Up to 4929 conditions per place. [2022-12-13 13:55:13,302 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 68 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2022-12-13 13:55:13,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 326 flow [2022-12-13 13:55:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 13:55:13,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37569444444444444 [2022-12-13 13:55:13,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 13:55:13,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 13:55:13,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:13,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 13:55:13,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,316 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 190 flow. Second operand 3 states and 541 transitions. [2022-12-13 13:55:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 326 flow [2022-12-13 13:55:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:13,318 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 189 flow [2022-12-13 13:55:13,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-12-13 13:55:13,318 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -29 predicate places. [2022-12-13 13:55:13,319 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 189 flow [2022-12-13 13:55:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:13,319 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:55:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:55:13,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash 47840634, now seen corresponding path program 1 times [2022-12-13 13:55:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:13,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135189449] [2022-12-13 13:55:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:13,373 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 13:55:13,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:13,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135189449] [2022-12-13 13:55:13,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135189449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:13,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:13,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:13,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880827146] [2022-12-13 13:55:13,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:13,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:13,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:13,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:13,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 480 [2022-12-13 13:55:13,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:13,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 480 [2022-12-13 13:55:13,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:13,913 INFO L130 PetriNetUnfolder]: 2729/4826 cut-off events. [2022-12-13 13:55:13,914 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 13:55:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 4826 events. 2729/4826 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35197 event pairs, 2295 based on Foata normal form. 0/3083 useless extension candidates. Maximal degree in co-relation 9240. Up to 4321 conditions per place. [2022-12-13 13:55:13,930 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 64 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-12-13 13:55:13,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 311 flow [2022-12-13 13:55:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2022-12-13 13:55:13,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3729166666666667 [2022-12-13 13:55:13,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2022-12-13 13:55:13,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2022-12-13 13:55:13,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:13,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2022-12-13 13:55:13,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,934 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 189 flow. Second operand 3 states and 537 transitions. [2022-12-13 13:55:13,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 311 flow [2022-12-13 13:55:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:13,936 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 182 flow [2022-12-13 13:55:13,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2022-12-13 13:55:13,937 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -32 predicate places. [2022-12-13 13:55:13,937 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 182 flow [2022-12-13 13:55:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:13,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:13,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:55:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:55:13,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 47840635, now seen corresponding path program 1 times [2022-12-13 13:55:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794552606] [2022-12-13 13:55:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:14,014 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 13:55:14,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794552606] [2022-12-13 13:55:14,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794552606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:14,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:14,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:14,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480732020] [2022-12-13 13:55:14,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:14,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:14,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 480 [2022-12-13 13:55:14,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:14,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 480 [2022-12-13 13:55:14,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:14,369 INFO L130 PetriNetUnfolder]: 2377/4200 cut-off events. [2022-12-13 13:55:14,369 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-12-13 13:55:14,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8048 conditions, 4200 events. 2377/4200 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29864 event pairs, 1975 based on Foata normal form. 0/2803 useless extension candidates. Maximal degree in co-relation 8038. Up to 3753 conditions per place. [2022-12-13 13:55:14,396 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 60 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2022-12-13 13:55:14,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 296 flow [2022-12-13 13:55:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-12-13 13:55:14,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38263888888888886 [2022-12-13 13:55:14,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-12-13 13:55:14,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-12-13 13:55:14,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:14,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-12-13 13:55:14,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,403 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 182 flow. Second operand 3 states and 551 transitions. [2022-12-13 13:55:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 296 flow [2022-12-13 13:55:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:14,405 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 175 flow [2022-12-13 13:55:14,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2022-12-13 13:55:14,406 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -35 predicate places. [2022-12-13 13:55:14,406 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 175 flow [2022-12-13 13:55:14,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:14,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:14,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:55:14,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash -451877057, now seen corresponding path program 1 times [2022-12-13 13:55:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:14,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239398260] [2022-12-13 13:55:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:14,434 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 13:55:14,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:14,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239398260] [2022-12-13 13:55:14,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239398260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:14,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:14,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267000913] [2022-12-13 13:55:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:14,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 480 [2022-12-13 13:55:14,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:14,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 480 [2022-12-13 13:55:14,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:14,985 INFO L130 PetriNetUnfolder]: 2933/5169 cut-off events. [2022-12-13 13:55:14,985 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-12-13 13:55:14,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 5169 events. 2933/5169 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38928 event pairs, 305 based on Foata normal form. 0/3611 useless extension candidates. Maximal degree in co-relation 9902. Up to 3867 conditions per place. [2022-12-13 13:55:15,005 INFO L137 encePairwiseOnDemand]: 474/480 looper letters, 116 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2022-12-13 13:55:15,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 139 transitions, 540 flow [2022-12-13 13:55:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2022-12-13 13:55:15,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41805555555555557 [2022-12-13 13:55:15,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2022-12-13 13:55:15,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2022-12-13 13:55:15,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:15,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2022-12-13 13:55:15,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,011 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 175 flow. Second operand 3 states and 602 transitions. [2022-12-13 13:55:15,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 139 transitions, 540 flow [2022-12-13 13:55:15,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:15,013 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 212 flow [2022-12-13 13:55:15,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2022-12-13 13:55:15,014 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -32 predicate places. [2022-12-13 13:55:15,014 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 212 flow [2022-12-13 13:55:15,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:15,014 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:15,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:55:15,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -364342873, now seen corresponding path program 1 times [2022-12-13 13:55:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412960558] [2022-12-13 13:55:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:15,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:15,125 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 13:55:15,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:15,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412960558] [2022-12-13 13:55:15,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412960558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:15,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:15,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:15,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806234205] [2022-12-13 13:55:15,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:15,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 480 [2022-12-13 13:55:15,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:15,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 480 [2022-12-13 13:55:15,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:15,510 INFO L130 PetriNetUnfolder]: 1989/3549 cut-off events. [2022-12-13 13:55:15,511 INFO L131 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-12-13 13:55:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7159 conditions, 3549 events. 1989/3549 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24526 event pairs, 1491 based on Foata normal form. 282/2748 useless extension candidates. Maximal degree in co-relation 7145. Up to 3127 conditions per place. [2022-12-13 13:55:15,521 INFO L137 encePairwiseOnDemand]: 469/480 looper letters, 53 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 13:55:15,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 300 flow [2022-12-13 13:55:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 13:55:15,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37569444444444444 [2022-12-13 13:55:15,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 13:55:15,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 13:55:15,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:15,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 13:55:15,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,525 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 212 flow. Second operand 3 states and 541 transitions. [2022-12-13 13:55:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 300 flow [2022-12-13 13:55:15,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:55:15,527 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 184 flow [2022-12-13 13:55:15,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2022-12-13 13:55:15,528 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -42 predicate places. [2022-12-13 13:55:15,528 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 184 flow [2022-12-13 13:55:15,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:15,528 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:55:15,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -364342872, now seen corresponding path program 1 times [2022-12-13 13:55:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907400071] [2022-12-13 13:55:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:15,593 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 13:55:15,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907400071] [2022-12-13 13:55:15,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907400071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:15,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:15,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:55:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016814318] [2022-12-13 13:55:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:15,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:55:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:55:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:15,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 480 [2022-12-13 13:55:15,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:15,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 480 [2022-12-13 13:55:15,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:15,830 INFO L130 PetriNetUnfolder]: 1263/2317 cut-off events. [2022-12-13 13:55:15,830 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-12-13 13:55:15,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 2317 events. 1263/2317 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14817 event pairs, 881 based on Foata normal form. 0/1820 useless extension candidates. Maximal degree in co-relation 4524. Up to 1957 conditions per place. [2022-12-13 13:55:15,837 INFO L137 encePairwiseOnDemand]: 469/480 looper letters, 43 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 13:55:15,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 252 flow [2022-12-13 13:55:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-12-13 13:55:15,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3625 [2022-12-13 13:55:15,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-12-13 13:55:15,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-12-13 13:55:15,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:15,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-12-13 13:55:15,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,841 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 184 flow. Second operand 3 states and 522 transitions. [2022-12-13 13:55:15,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 252 flow [2022-12-13 13:55:15,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:15,842 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 165 flow [2022-12-13 13:55:15,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2022-12-13 13:55:15,843 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -51 predicate places. [2022-12-13 13:55:15,843 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 165 flow [2022-12-13 13:55:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:15,843 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 13:55:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:55:15,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-13 13:55:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1475369688, now seen corresponding path program 1 times [2022-12-13 13:55:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759335282] [2022-12-13 13:55:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:55:15,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:55:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:55:15,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:55:15,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2022-12-13 13:55:15,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2022-12-13 13:55:15,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (70 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (69 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (62 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2022-12-13 13:55:15,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2022-12-13 13:55:15,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2022-12-13 13:55:15,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2022-12-13 13:55:15,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2022-12-13 13:55:15,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2022-12-13 13:55:15,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:55:15,864 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:15,865 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:55:15,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:55:15,927 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:55:15,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,000 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-12-13 13:55:16,000 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 13:55:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1448 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-12-13 13:55:16,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:55:16,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-12-13 13:55:16,080 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-12-13 13:55:16,080 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 13:55:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1448 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-12-13 13:55:16,100 INFO L119 LiptonReduction]: Number of co-enabled transitions 72000 [2022-12-13 13:55:24,837 INFO L134 LiptonReduction]: Checked pairs total: 234044 [2022-12-13 13:55:24,837 INFO L136 LiptonReduction]: Total number of compositions: 321 [2022-12-13 13:55:24,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:55:24,838 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@10058183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:55:24,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2022-12-13 13:55:24,839 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:55:24,839 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:55:24,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:24,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:24,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:55:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 74367, now seen corresponding path program 1 times [2022-12-13 13:55:24,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361282922] [2022-12-13 13:55:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:24,853 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 13:55:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361282922] [2022-12-13 13:55:24,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361282922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:24,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:24,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:24,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863414098] [2022-12-13 13:55:24,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:24,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 667 [2022-12-13 13:55:24,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 379 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:24,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:24,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 667 [2022-12-13 13:55:24,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:51,732 INFO L130 PetriNetUnfolder]: 239770/344684 cut-off events. [2022-12-13 13:55:51,733 INFO L131 PetriNetUnfolder]: For 5866/5866 co-relation queries the response was YES. [2022-12-13 13:55:52,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670630 conditions, 344684 events. 239770/344684 cut-off events. For 5866/5866 co-relation queries the response was YES. Maximal size of possible extension queue 15107. Compared 3123560 event pairs, 213208 based on Foata normal form. 0/180929 useless extension candidates. Maximal degree in co-relation 208967. Up to 321850 conditions per place. [2022-12-13 13:55:53,283 INFO L137 encePairwiseOnDemand]: 618/667 looper letters, 101 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2022-12-13 13:55:53,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 131 transitions, 487 flow [2022-12-13 13:55:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:55:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 804 transitions. [2022-12-13 13:55:53,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4017991004497751 [2022-12-13 13:55:53,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 804 transitions. [2022-12-13 13:55:53,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 804 transitions. [2022-12-13 13:55:53,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:53,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 804 transitions. [2022-12-13 13:55:53,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:53,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:53,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:53,289 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 379 flow. Second operand 3 states and 804 transitions. [2022-12-13 13:55:53,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 131 transitions, 487 flow [2022-12-13 13:55:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 131 transitions, 481 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 13:55:53,295 INFO L231 Difference]: Finished difference. Result has 128 places, 131 transitions, 279 flow [2022-12-13 13:55:53,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=128, PETRI_TRANSITIONS=131} [2022-12-13 13:55:53,295 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -43 predicate places. [2022-12-13 13:55:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 131 transitions, 279 flow [2022-12-13 13:55:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:53,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:53,296 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:55:53,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:55:53,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:55:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 74368, now seen corresponding path program 1 times [2022-12-13 13:55:53,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816095041] [2022-12-13 13:55:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:53,322 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 13:55:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816095041] [2022-12-13 13:55:53,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816095041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:53,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:53,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:55:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88322105] [2022-12-13 13:55:53,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:53,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:53,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 667 [2022-12-13 13:55:53,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 131 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:53,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:53,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 667 [2022-12-13 13:55:53,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:09,242 INFO L130 PetriNetUnfolder]: 150847/220928 cut-off events. [2022-12-13 13:56:09,242 INFO L131 PetriNetUnfolder]: For 2774/2774 co-relation queries the response was YES. [2022-12-13 13:56:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429427 conditions, 220928 events. 150847/220928 cut-off events. For 2774/2774 co-relation queries the response was YES. Maximal size of possible extension queue 9283. Compared 1952730 event pairs, 133139 based on Foata normal form. 0/130190 useless extension candidates. Maximal degree in co-relation 429418. Up to 205567 conditions per place. [2022-12-13 13:56:10,257 INFO L137 encePairwiseOnDemand]: 665/667 looper letters, 100 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2022-12-13 13:56:10,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 130 transitions, 479 flow [2022-12-13 13:56:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:56:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:56:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2022-12-13 13:56:10,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3808095952023988 [2022-12-13 13:56:10,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2022-12-13 13:56:10,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2022-12-13 13:56:10,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:10,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2022-12-13 13:56:10,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:10,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:10,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:10,264 INFO L175 Difference]: Start difference. First operand has 128 places, 131 transitions, 279 flow. Second operand 3 states and 762 transitions. [2022-12-13 13:56:10,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 130 transitions, 479 flow [2022-12-13 13:56:10,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 130 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:56:10,267 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 278 flow [2022-12-13 13:56:10,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2022-12-13 13:56:10,268 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -43 predicate places. [2022-12-13 13:56:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 278 flow [2022-12-13 13:56:10,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:10,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:10,268 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:56:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:56:10,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:56:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 71529023, now seen corresponding path program 1 times [2022-12-13 13:56:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384148857] [2022-12-13 13:56:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:10,325 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 13:56:10,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384148857] [2022-12-13 13:56:10,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384148857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:10,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:10,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:56:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025940594] [2022-12-13 13:56:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:10,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:56:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:56:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:56:10,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 667 [2022-12-13 13:56:10,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:10,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:10,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 667 [2022-12-13 13:56:10,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:23,351 INFO L130 PetriNetUnfolder]: 123543/180997 cut-off events. [2022-12-13 13:56:23,351 INFO L131 PetriNetUnfolder]: For 2422/2422 co-relation queries the response was YES. [2022-12-13 13:56:23,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351664 conditions, 180997 events. 123543/180997 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 7680. Compared 1573558 event pairs, 108135 based on Foata normal form. 0/111659 useless extension candidates. Maximal degree in co-relation 351654. Up to 168119 conditions per place. [2022-12-13 13:56:24,217 INFO L137 encePairwiseOnDemand]: 660/667 looper letters, 94 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2022-12-13 13:56:24,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 124 transitions, 456 flow [2022-12-13 13:56:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:56:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:56:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2022-12-13 13:56:24,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3818090954522739 [2022-12-13 13:56:24,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2022-12-13 13:56:24,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2022-12-13 13:56:24,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:24,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2022-12-13 13:56:24,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:24,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:24,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:24,224 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 278 flow. Second operand 3 states and 764 transitions. [2022-12-13 13:56:24,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 124 transitions, 456 flow [2022-12-13 13:56:24,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:56:24,227 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 267 flow [2022-12-13 13:56:24,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2022-12-13 13:56:24,227 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -48 predicate places. [2022-12-13 13:56:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 267 flow [2022-12-13 13:56:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:24,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:24,228 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:56:24,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:56:24,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:56:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash 71529022, now seen corresponding path program 1 times [2022-12-13 13:56:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:24,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713257691] [2022-12-13 13:56:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:24,274 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 13:56:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713257691] [2022-12-13 13:56:24,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713257691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:24,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:24,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:56:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823399353] [2022-12-13 13:56:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:56:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:56:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:56:24,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 667 [2022-12-13 13:56:24,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:24,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:24,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 667 [2022-12-13 13:56:24,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:34,918 INFO L130 PetriNetUnfolder]: 99743/146134 cut-off events. [2022-12-13 13:56:34,918 INFO L131 PetriNetUnfolder]: For 2094/2094 co-relation queries the response was YES. [2022-12-13 13:56:35,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283845 conditions, 146134 events. 99743/146134 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 6370. Compared 1248384 event pairs, 86475 based on Foata normal form. 0/94714 useless extension candidates. Maximal degree in co-relation 283834. Up to 135519 conditions per place. [2022-12-13 13:56:35,640 INFO L137 encePairwiseOnDemand]: 660/667 looper letters, 88 selfloop transitions, 1 changer transitions 0/118 dead transitions. [2022-12-13 13:56:35,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 433 flow [2022-12-13 13:56:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:56:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:56:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 13:56:35,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3728135932033983 [2022-12-13 13:56:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 13:56:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 13:56:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:35,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 13:56:35,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:35,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:35,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:35,646 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 267 flow. Second operand 3 states and 746 transitions. [2022-12-13 13:56:35,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 433 flow [2022-12-13 13:56:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:56:35,649 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 256 flow [2022-12-13 13:56:35,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2022-12-13 13:56:35,649 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -53 predicate places. [2022-12-13 13:56:35,649 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 256 flow [2022-12-13 13:56:35,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:35,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:35,650 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:56:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:56:35,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:56:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2015627594, now seen corresponding path program 1 times [2022-12-13 13:56:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:35,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686604242] [2022-12-13 13:56:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:35,676 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 13:56:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686604242] [2022-12-13 13:56:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686604242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:35,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:35,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:56:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667897957] [2022-12-13 13:56:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:56:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:56:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:56:35,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 667 [2022-12-13 13:56:35,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:35,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:35,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 667 [2022-12-13 13:56:35,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:51,454 INFO L130 PetriNetUnfolder]: 141293/205953 cut-off events. [2022-12-13 13:56:51,454 INFO L131 PetriNetUnfolder]: For 2823/2823 co-relation queries the response was YES. [2022-12-13 13:56:51,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400895 conditions, 205953 events. 141293/205953 cut-off events. For 2823/2823 co-relation queries the response was YES. Maximal size of possible extension queue 8634. Compared 1809927 event pairs, 30165 based on Foata normal form. 1762/140760 useless extension candidates. Maximal degree in co-relation 400883. Up to 134720 conditions per place. [2022-12-13 13:56:52,409 INFO L137 encePairwiseOnDemand]: 655/667 looper letters, 290 selfloop transitions, 15 changer transitions 0/330 dead transitions. [2022-12-13 13:56:52,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 330 transitions, 1315 flow [2022-12-13 13:56:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:56:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:56:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1381 transitions. [2022-12-13 13:56:52,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4140929535232384 [2022-12-13 13:56:52,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1381 transitions. [2022-12-13 13:56:52,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1381 transitions. [2022-12-13 13:56:52,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:52,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1381 transitions. [2022-12-13 13:56:52,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.2) internal successors, (1381), 5 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:52,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:52,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:52,419 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 256 flow. Second operand 5 states and 1381 transitions. [2022-12-13 13:56:52,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 330 transitions, 1315 flow [2022-12-13 13:56:52,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 330 transitions, 1314 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:56:52,423 INFO L231 Difference]: Finished difference. Result has 125 places, 131 transitions, 377 flow [2022-12-13 13:56:52,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=125, PETRI_TRANSITIONS=131} [2022-12-13 13:56:52,424 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -46 predicate places. [2022-12-13 13:56:52,424 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 131 transitions, 377 flow [2022-12-13 13:56:52,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:52,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:52,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:56:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:56:52,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:56:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1846126912, now seen corresponding path program 1 times [2022-12-13 13:56:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:52,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505050701] [2022-12-13 13:56:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:52,494 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 13:56:52,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505050701] [2022-12-13 13:56:52,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505050701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:52,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:52,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:56:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183085903] [2022-12-13 13:56:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:56:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:56:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:56:52,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 667 [2022-12-13 13:56:52,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 131 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:52,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:52,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 667 [2022-12-13 13:56:52,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:57:02,646 INFO L130 PetriNetUnfolder]: 75638/113815 cut-off events. [2022-12-13 13:57:02,646 INFO L131 PetriNetUnfolder]: For 30407/30952 co-relation queries the response was YES. [2022-12-13 13:57:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239942 conditions, 113815 events. 75638/113815 cut-off events. For 30407/30952 co-relation queries the response was YES. Maximal size of possible extension queue 4784. Compared 983078 event pairs, 58650 based on Foata normal form. 11020/89169 useless extension candidates. Maximal degree in co-relation 239925. Up to 102134 conditions per place. [2022-12-13 13:57:03,286 INFO L137 encePairwiseOnDemand]: 651/667 looper letters, 80 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2022-12-13 13:57:03,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 116 transitions, 509 flow [2022-12-13 13:57:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:57:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:57:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-12-13 13:57:03,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3758120939530235 [2022-12-13 13:57:03,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-12-13 13:57:03,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-12-13 13:57:03,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:57:03,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-12-13 13:57:03,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:03,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:03,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:03,293 INFO L175 Difference]: Start difference. First operand has 125 places, 131 transitions, 377 flow. Second operand 3 states and 752 transitions. [2022-12-13 13:57:03,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 116 transitions, 509 flow [2022-12-13 13:57:03,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 116 transitions, 509 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:57:03,306 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 349 flow [2022-12-13 13:57:03,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2022-12-13 13:57:03,306 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -59 predicate places. [2022-12-13 13:57:03,307 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 349 flow [2022-12-13 13:57:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:03,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:57:03,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:57:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:57:03,307 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:57:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:57:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1846126911, now seen corresponding path program 1 times [2022-12-13 13:57:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:57:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423609384] [2022-12-13 13:57:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:57:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:57:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:57:03,367 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 13:57:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:57:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423609384] [2022-12-13 13:57:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423609384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:57:03,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:57:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:57:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044476881] [2022-12-13 13:57:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:57:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:57:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:57:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:57:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:57:03,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 667 [2022-12-13 13:57:03,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:03,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:57:03,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 667 [2022-12-13 13:57:03,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:57:08,438 INFO L130 PetriNetUnfolder]: 37596/57930 cut-off events. [2022-12-13 13:57:08,439 INFO L131 PetriNetUnfolder]: For 18100/18515 co-relation queries the response was YES. [2022-12-13 13:57:08,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 57930 events. 37596/57930 cut-off events. For 18100/18515 co-relation queries the response was YES. Maximal size of possible extension queue 2332. Compared 469141 event pairs, 27042 based on Foata normal form. 331/46937 useless extension candidates. Maximal degree in co-relation 122604. Up to 50162 conditions per place. [2022-12-13 13:57:08,731 INFO L137 encePairwiseOnDemand]: 651/667 looper letters, 65 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2022-12-13 13:57:08,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 101 transitions, 451 flow [2022-12-13 13:57:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:57:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:57:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2022-12-13 13:57:08,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2022-12-13 13:57:08,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2022-12-13 13:57:08,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2022-12-13 13:57:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:57:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2022-12-13 13:57:08,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:08,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:08,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:08,737 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 349 flow. Second operand 3 states and 725 transitions. [2022-12-13 13:57:08,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 101 transitions, 451 flow [2022-12-13 13:57:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 101 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:57:08,746 INFO L231 Difference]: Finished difference. Result has 98 places, 101 transitions, 320 flow [2022-12-13 13:57:08,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=98, PETRI_TRANSITIONS=101} [2022-12-13 13:57:08,746 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -73 predicate places. [2022-12-13 13:57:08,746 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 101 transitions, 320 flow [2022-12-13 13:57:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:08,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:57:08,747 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:57:08,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:57:08,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err20ASSERT_VIOLATIONARRAY_INDEX === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:57:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:57:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash 912881831, now seen corresponding path program 1 times [2022-12-13 13:57:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:57:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003943351] [2022-12-13 13:57:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:57:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:57:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:57:08,776 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 13:57:08,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:57:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003943351] [2022-12-13 13:57:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003943351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:57:08,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:57:08,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:57:08,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938004095] [2022-12-13 13:57:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:57:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:57:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:57:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:57:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:57:08,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 667 [2022-12-13 13:57:08,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 101 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:08,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:57:08,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 667 [2022-12-13 13:57:08,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:57:14,956 INFO L130 PetriNetUnfolder]: 52285/77546 cut-off events. [2022-12-13 13:57:14,956 INFO L131 PetriNetUnfolder]: For 23782/24365 co-relation queries the response was YES. [2022-12-13 13:57:15,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166392 conditions, 77546 events. 52285/77546 cut-off events. For 23782/24365 co-relation queries the response was YES. Maximal size of possible extension queue 3478. Compared 617104 event pairs, 12535 based on Foata normal form. 1147/66180 useless extension candidates. Maximal degree in co-relation 166372. Up to 65297 conditions per place. [2022-12-13 13:57:15,364 INFO L137 encePairwiseOnDemand]: 660/667 looper letters, 102 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2022-12-13 13:57:15,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 666 flow [2022-12-13 13:57:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:57:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:57:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 13:57:15,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3728135932033983 [2022-12-13 13:57:15,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 13:57:15,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 13:57:15,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:57:15,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 13:57:15,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:15,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:15,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:15,370 INFO L175 Difference]: Start difference. First operand has 98 places, 101 transitions, 320 flow. Second operand 3 states and 746 transitions. [2022-12-13 13:57:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 666 flow [2022-12-13 13:57:15,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 135 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:57:15,385 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 349 flow [2022-12-13 13:57:15,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2022-12-13 13:57:15,386 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, -71 predicate places. [2022-12-13 13:57:15,386 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 349 flow [2022-12-13 13:57:15,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:15,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:57:15,386 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 13:57:15,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 13:57:15,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-13 13:57:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:57:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1294644377, now seen corresponding path program 1 times [2022-12-13 13:57:15,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:57:15,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980583278] [2022-12-13 13:57:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:57:15,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:57:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:57:15,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:57:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:57:15,407 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:57:15,407 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:57:15,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (127 of 128 remaining) [2022-12-13 13:57:15,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (126 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (125 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (124 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (123 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (122 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (121 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (120 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 128 remaining) [2022-12-13 13:57:15,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 128 remaining) [2022-12-13 13:57:15,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (106 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (101 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (100 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 128 remaining) [2022-12-13 13:57:15,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (93 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 128 remaining) [2022-12-13 13:57:15,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 128 remaining) [2022-12-13 13:57:15,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (72 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 128 remaining) [2022-12-13 13:57:15,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (67 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (66 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 128 remaining) [2022-12-13 13:57:15,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 128 remaining) [2022-12-13 13:57:15,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 128 remaining) [2022-12-13 13:57:15,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 128 remaining) [2022-12-13 13:57:15,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 128 remaining) [2022-12-13 13:57:15,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 128 remaining) [2022-12-13 13:57:15,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 128 remaining) [2022-12-13 13:57:15,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 128 remaining) [2022-12-13 13:57:15,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:57:15,421 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:57:15,421 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:57:15,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 13:57:15,493 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:57:15,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,570 INFO L130 PetriNetUnfolder]: 29/517 cut-off events. [2022-12-13 13:57:15,570 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 13:57:15,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 517 events. 29/517 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2168 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 418. Up to 10 conditions per place. [2022-12-13 13:57:15,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:57:15,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 431 places, 447 transitions, 926 flow [2022-12-13 13:57:15,654 INFO L130 PetriNetUnfolder]: 29/517 cut-off events. [2022-12-13 13:57:15,654 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 13:57:15,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 517 events. 29/517 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2168 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 418. Up to 10 conditions per place. [2022-12-13 13:57:15,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 136400 [2022-12-13 13:57:25,978 INFO L134 LiptonReduction]: Checked pairs total: 452761 [2022-12-13 13:57:25,978 INFO L136 LiptonReduction]: Total number of compositions: 398 [2022-12-13 13:57:25,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:57:25,980 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@10058183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:57:25,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 159 error locations. [2022-12-13 13:57:25,980 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:57:25,980 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:57:25,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:57:25,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:57:25,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 156 more)] === [2022-12-13 13:57:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:57:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 104610, now seen corresponding path program 1 times [2022-12-13 13:57:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:57:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093000117] [2022-12-13 13:57:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:57:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:57:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:57:25,998 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 13:57:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:57:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093000117] [2022-12-13 13:57:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093000117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:57:25,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:57:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:57:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681093872] [2022-12-13 13:57:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:57:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:57:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:57:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:57:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:57:26,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 845 [2022-12-13 13:57:26,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 236 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:26,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:57:26,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 845 [2022-12-13 13:57:26,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand