./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/01b_inc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R --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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:28:08,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:28:08,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:28:08,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:28:08,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:28:08,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:28:08,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:28:08,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:28:08,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:28:08,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:28:08,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:28:08,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:28:08,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:28:08,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:28:08,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:28:08,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:28:08,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:28:08,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:28:08,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:28:08,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:28:08,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:28:08,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:28:08,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:28:08,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:28:08,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:28:08,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:28:08,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:28:08,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:28:08,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:28:08,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:28:08,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:28:08,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:28:08,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:28:08,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:28:08,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:28:08,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:28:08,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:28:08,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:28:08,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:28:08,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:28:08,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:28:08,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:28:09,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:28:09,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:28:09,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:28:09,013 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:28:09,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:28:09,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:28:09,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:28:09,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:28:09,016 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:28:09,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:28:09,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:28:09,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:28:09,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:28:09,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:28:09,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:28:09,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:28:09,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:28:09,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:28:09,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:28:09,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:28:09,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:28:09,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:28:09,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:28:09,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:28:09,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:28:09,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:09,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:28:09,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:28:09,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:28:09,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:28:09,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:28:09,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:28:09,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:28:09,023 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_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2022-11-25 17:28:09,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:28:09,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:28:09,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:28:09,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:28:09,336 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:28:09,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/01b_inc.i [2022-11-25 17:28:12,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:28:12,871 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:28:12,871 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/sv-benchmarks/c/pthread-ext/01b_inc.i [2022-11-25 17:28:12,891 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/data/ba1bf2be8/3e97432d55b44e8daa999f2adaeb8429/FLAG1d4958531 [2022-11-25 17:28:12,911 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/data/ba1bf2be8/3e97432d55b44e8daa999f2adaeb8429 [2022-11-25 17:28:12,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:28:12,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:28:12,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:12,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:28:12,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:28:12,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:12" (1/1) ... [2022-11-25 17:28:12,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6780771c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:12, skipping insertion in model container [2022-11-25 17:28:12,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:12" (1/1) ... [2022-11-25 17:28:12,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:28:12,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:28:13,210 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:28:13,463 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:13,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:13,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:13,468 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_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/sv-benchmarks/c/pthread-ext/01b_inc.i[31005,31018] [2022-11-25 17:28:13,476 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:13,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:13,496 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:28:13,524 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:28:13,560 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:13,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:13,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:13,567 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_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/sv-benchmarks/c/pthread-ext/01b_inc.i[31005,31018] [2022-11-25 17:28:13,568 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:13,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:13,617 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:28:13,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13 WrapperNode [2022-11-25 17:28:13,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:13,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:13,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:28:13,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:28:13,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,690 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-11-25 17:28:13,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:13,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:28:13,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:28:13,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:28:13,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,733 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:28:13,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:28:13,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:28:13,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:28:13,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (1/1) ... [2022-11-25 17:28:13,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:13,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:28:13,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:28:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:28:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:28:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:28:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:28:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:28:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:28:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:28:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:28:13,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:28:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:28:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:28:13,855 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:28:14,025 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:28:14,027 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:28:14,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:28:14,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:28:14,348 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:28:14,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:14 BoogieIcfgContainer [2022-11-25 17:28:14,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:28:14,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:28:14,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:28:14,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:28:14,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:28:12" (1/3) ... [2022-11-25 17:28:14,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf7612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:14, skipping insertion in model container [2022-11-25 17:28:14,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:13" (2/3) ... [2022-11-25 17:28:14,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf7612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:14, skipping insertion in model container [2022-11-25 17:28:14,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:14" (3/3) ... [2022-11-25 17:28:14,372 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-11-25 17:28:14,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:28:14,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 17:28:14,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:28:14,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:28:14,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,573 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-25 17:28:14,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 66 events. 3/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2022-11-25 17:28:14,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,597 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:14,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 105 flow [2022-11-25 17:28:14,642 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-25 17:28:14,642 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:14,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 66 events. 3/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2022-11-25 17:28:14,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2022-11-25 17:28:17,555 INFO L134 LiptonReduction]: Checked pairs total: 476 [2022-11-25 17:28:17,556 INFO L136 LiptonReduction]: Total number of compositions: 49 [2022-11-25 17:28:17,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:17,585 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;@6376b3ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:17,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:28:17,590 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:28:17,590 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:17,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:17,591 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:17,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:28:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 9331, now seen corresponding path program 1 times [2022-11-25 17:28:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029940849] [2022-11-25 17:28:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:17,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:17,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029940849] [2022-11-25 17:28:17,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029940849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:17,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:17,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677412436] [2022-11-25 17:28:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:28:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:28:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:28:17,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 99 [2022-11-25 17:28:17,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:17,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:17,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 99 [2022-11-25 17:28:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:17,856 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2022-11-25 17:28:17,857 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:17,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2022-11-25 17:28:17,858 INFO L137 encePairwiseOnDemand]: 96/99 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2022-11-25 17:28:17,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2022-11-25 17:28:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:28:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:28:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 94 transitions. [2022-11-25 17:28:17,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2022-11-25 17:28:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 94 transitions. [2022-11-25 17:28:17,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 94 transitions. [2022-11-25 17:28:17,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:17,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 94 transitions. [2022-11-25 17:28:17,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:17,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:17,891 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:17,893 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 2 states and 94 transitions. [2022-11-25 17:28:17,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2022-11-25 17:28:17,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:17,899 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 21 flow [2022-11-25 17:28:17,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2022-11-25 17:28:17,906 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-11-25 17:28:17,907 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 21 flow [2022-11-25 17:28:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:17,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:17,907 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:17,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:28:17,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:28:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash 9338, now seen corresponding path program 1 times [2022-11-25 17:28:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495689489] [2022-11-25 17:28:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:18,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495689489] [2022-11-25 17:28:18,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495689489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:18,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:18,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676962947] [2022-11-25 17:28:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:18,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:18,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:18,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 99 [2022-11-25 17:28:18,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:18,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 99 [2022-11-25 17:28:18,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:18,203 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-11-25 17:28:18,203 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:18,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 32. Up to 14 conditions per place. [2022-11-25 17:28:18,204 INFO L137 encePairwiseOnDemand]: 97/99 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2022-11-25 17:28:18,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 31 flow [2022-11-25 17:28:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2022-11-25 17:28:18,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2022-11-25 17:28:18,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2022-11-25 17:28:18,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2022-11-25 17:28:18,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:18,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2022-11-25 17:28:18,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,222 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 21 flow. Second operand 3 states and 121 transitions. [2022-11-25 17:28:18,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 31 flow [2022-11-25 17:28:18,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:18,226 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 21 flow [2022-11-25 17:28:18,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2022-11-25 17:28:18,229 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2022-11-25 17:28:18,230 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 21 flow [2022-11-25 17:28:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:18,230 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:28:18,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:28:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 9337, now seen corresponding path program 1 times [2022-11-25 17:28:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:18,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029940200] [2022-11-25 17:28:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:18,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029940200] [2022-11-25 17:28:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029940200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:18,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:18,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:18,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390600267] [2022-11-25 17:28:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:18,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 99 [2022-11-25 17:28:18,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:18,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 99 [2022-11-25 17:28:18,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:18,347 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 17:28:18,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:18,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 25. Up to 10 conditions per place. [2022-11-25 17:28:18,360 INFO L137 encePairwiseOnDemand]: 97/99 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2022-11-25 17:28:18,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 29 flow [2022-11-25 17:28:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2022-11-25 17:28:18,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2022-11-25 17:28:18,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2022-11-25 17:28:18,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2022-11-25 17:28:18,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:18,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2022-11-25 17:28:18,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,366 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 21 flow. Second operand 3 states and 114 transitions. [2022-11-25 17:28:18,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 29 flow [2022-11-25 17:28:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:18,367 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 20 flow [2022-11-25 17:28:18,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2022-11-25 17:28:18,368 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2022-11-25 17:28:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 20 flow [2022-11-25 17:28:18,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:18,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:18,369 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:28:18,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:28:18,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:28:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 38622422, now seen corresponding path program 1 times [2022-11-25 17:28:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166051226] [2022-11-25 17:28:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:18,388 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:28:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:18,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:28:18,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:28:18,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 17:28:18,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-11-25 17:28:18,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2022-11-25 17:28:18,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-11-25 17:28:18,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2022-11-25 17:28:18,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-11-25 17:28:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:28:18,438 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 17:28:18,441 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:28:18,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:28:18,462 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:28:18,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,486 INFO L130 PetriNetUnfolder]: 5/99 cut-off events. [2022-11-25 17:28:18,486 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:28:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 99 events. 5/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 67. Up to 6 conditions per place. [2022-11-25 17:28:18,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,488 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:18,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2022-11-25 17:28:18,509 INFO L130 PetriNetUnfolder]: 5/99 cut-off events. [2022-11-25 17:28:18,509 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:28:18,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 99 events. 5/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 67. Up to 6 conditions per place. [2022-11-25 17:28:18,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 1484 [2022-11-25 17:28:20,317 INFO L134 LiptonReduction]: Checked pairs total: 5371 [2022-11-25 17:28:20,317 INFO L136 LiptonReduction]: Total number of compositions: 43 [2022-11-25 17:28:20,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:20,321 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;@6376b3ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:20,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:28:20,322 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:28:20,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:20,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:20,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:20,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:28:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 13272, now seen corresponding path program 1 times [2022-11-25 17:28:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632294816] [2022-11-25 17:28:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632294816] [2022-11-25 17:28:20,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632294816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:20,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:20,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586648655] [2022-11-25 17:28:20,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:20,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:28:20,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:28:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:28:20,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 108 [2022-11-25 17:28:20,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:20,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 108 [2022-11-25 17:28:20,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:20,506 INFO L130 PetriNetUnfolder]: 196/414 cut-off events. [2022-11-25 17:28:20,506 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-25 17:28:20,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 414 events. 196/414 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2283 event pairs, 152 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 238. Up to 321 conditions per place. [2022-11-25 17:28:20,511 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 16 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-11-25 17:28:20,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 98 flow [2022-11-25 17:28:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:28:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:28:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 120 transitions. [2022-11-25 17:28:20,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-11-25 17:28:20,513 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 120 transitions. [2022-11-25 17:28:20,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 120 transitions. [2022-11-25 17:28:20,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:20,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 120 transitions. [2022-11-25 17:28:20,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 60.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 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) [2022-11-25 17:28:20,516 INFO L81 ComplementDD]: Finished complementDD. Result has 3 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) [2022-11-25 17:28:20,516 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 2 states and 120 transitions. [2022-11-25 17:28:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 98 flow [2022-11-25 17:28:20,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 96 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:20,518 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 64 flow [2022-11-25 17:28:20,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2022-11-25 17:28:20,519 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2022-11-25 17:28:20,520 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 64 flow [2022-11-25 17:28:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:20,520 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:20,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:28:20,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:28:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash 13277, now seen corresponding path program 1 times [2022-11-25 17:28:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:20,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319769402] [2022-11-25 17:28:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:20,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319769402] [2022-11-25 17:28:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319769402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:20,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:20,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364907504] [2022-11-25 17:28:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:20,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:28:20,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:20,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:28:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:20,694 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2022-11-25 17:28:20,694 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:28:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 308 events. 141/308 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1572 event pairs, 108 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 563. Up to 234 conditions per place. [2022-11-25 17:28:20,703 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 17:28:20,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 92 flow [2022-11-25 17:28:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2022-11-25 17:28:20,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4660493827160494 [2022-11-25 17:28:20,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2022-11-25 17:28:20,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2022-11-25 17:28:20,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:20,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2022-11-25 17:28:20,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,714 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 64 flow. Second operand 3 states and 151 transitions. [2022-11-25 17:28:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 92 flow [2022-11-25 17:28:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:20,716 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2022-11-25 17:28:20,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=62, 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=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-11-25 17:28:20,721 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2022-11-25 17:28:20,722 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2022-11-25 17:28:20,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:20,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:20,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:28:20,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:28:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash 13278, now seen corresponding path program 1 times [2022-11-25 17:28:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:20,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692707779] [2022-11-25 17:28:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:20,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:20,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692707779] [2022-11-25 17:28:20,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692707779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:20,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:20,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709714146] [2022-11-25 17:28:20,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:20,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:20,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2022-11-25 17:28:20,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:20,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2022-11-25 17:28:20,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:20,884 INFO L130 PetriNetUnfolder]: 86/202 cut-off events. [2022-11-25 17:28:20,884 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:28:20,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 202 events. 86/202 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 894 event pairs, 64 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 372. Up to 148 conditions per place. [2022-11-25 17:28:20,886 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 13 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-11-25 17:28:20,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 90 flow [2022-11-25 17:28:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2022-11-25 17:28:20,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-11-25 17:28:20,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2022-11-25 17:28:20,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2022-11-25 17:28:20,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:20,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2022-11-25 17:28:20,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,895 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 156 transitions. [2022-11-25 17:28:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 90 flow [2022-11-25 17:28:20,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:20,898 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 63 flow [2022-11-25 17:28:20,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2022-11-25 17:28:20,901 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2022-11-25 17:28:20,901 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 63 flow [2022-11-25 17:28:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:20,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:20,904 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:28:20,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:28:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash 603725811, now seen corresponding path program 1 times [2022-11-25 17:28:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067437198] [2022-11-25 17:28:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067437198] [2022-11-25 17:28:21,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067437198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:21,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:21,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:21,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620049479] [2022-11-25 17:28:21,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:21,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:21,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:21,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:21,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:21,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 108 [2022-11-25 17:28:21,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:21,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 108 [2022-11-25 17:28:21,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:21,392 INFO L130 PetriNetUnfolder]: 200/387 cut-off events. [2022-11-25 17:28:21,393 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:28:21,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 387 events. 200/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1956 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 782. Up to 128 conditions per place. [2022-11-25 17:28:21,396 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 35 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2022-11-25 17:28:21,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 211 flow [2022-11-25 17:28:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:28:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:28:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 312 transitions. [2022-11-25 17:28:21,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-11-25 17:28:21,399 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 312 transitions. [2022-11-25 17:28:21,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 312 transitions. [2022-11-25 17:28:21,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:21,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 312 transitions. [2022-11-25 17:28:21,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,404 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,404 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 63 flow. Second operand 6 states and 312 transitions. [2022-11-25 17:28:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 211 flow [2022-11-25 17:28:21,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:21,406 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 118 flow [2022-11-25 17:28:21,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-11-25 17:28:21,407 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2022-11-25 17:28:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 118 flow [2022-11-25 17:28:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:21,409 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:28:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:28:21,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:28:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 668914003, now seen corresponding path program 1 times [2022-11-25 17:28:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:21,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294506195] [2022-11-25 17:28:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:21,425 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:28:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:21,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:28:21,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:28:21,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:28:21,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-11-25 17:28:21,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2022-11-25 17:28:21,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 17:28:21,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 17:28:21,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 17:28:21,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 17:28:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:28:21,440 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 17:28:21,440 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:28:21,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:28:21,462 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:28:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,481 INFO L130 PetriNetUnfolder]: 7/132 cut-off events. [2022-11-25 17:28:21,481 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:28:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 132 events. 7/132 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 335 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2022-11-25 17:28:21,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,484 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:21,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 181 flow [2022-11-25 17:28:21,501 INFO L130 PetriNetUnfolder]: 7/132 cut-off events. [2022-11-25 17:28:21,501 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:28:21,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 132 events. 7/132 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 335 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2022-11-25 17:28:21,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-11-25 17:28:23,637 INFO L134 LiptonReduction]: Checked pairs total: 11706 [2022-11-25 17:28:23,637 INFO L136 LiptonReduction]: Total number of compositions: 49 [2022-11-25 17:28:23,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:23,640 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;@6376b3ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:23,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 17:28:23,642 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:28:23,642 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:23,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:23,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:23,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash 17880, now seen corresponding path program 1 times [2022-11-25 17:28:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993468727] [2022-11-25 17:28:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:23,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993468727] [2022-11-25 17:28:23,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993468727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:23,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:23,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416318827] [2022-11-25 17:28:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:28:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:28:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:28:23,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 129 [2022-11-25 17:28:23,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 99 flow. Second operand has 2 states, 2 states have (on average 61.0) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:23,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:23,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 129 [2022-11-25 17:28:23,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:24,057 INFO L130 PetriNetUnfolder]: 1596/2690 cut-off events. [2022-11-25 17:28:24,058 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-11-25 17:28:24,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 2690 events. 1596/2690 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17509 event pairs, 1252 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 769. Up to 2221 conditions per place. [2022-11-25 17:28:24,082 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 22 selfloop transitions, 0 changer transitions 0/37 dead transitions. [2022-11-25 17:28:24,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 139 flow [2022-11-25 17:28:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:28:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:28:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 144 transitions. [2022-11-25 17:28:24,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2022-11-25 17:28:24,084 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 144 transitions. [2022-11-25 17:28:24,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 144 transitions. [2022-11-25 17:28:24,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:24,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 144 transitions. [2022-11-25 17:28:24,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,087 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,087 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 99 flow. Second operand 2 states and 144 transitions. [2022-11-25 17:28:24,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 139 flow [2022-11-25 17:28:24,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 133 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:24,091 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 89 flow [2022-11-25 17:28:24,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=89, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-11-25 17:28:24,094 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-11-25 17:28:24,094 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 89 flow [2022-11-25 17:28:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 61.0) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:24,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:24,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:28:24,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 17885, now seen corresponding path program 1 times [2022-11-25 17:28:24,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:24,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207436489] [2022-11-25 17:28:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207436489] [2022-11-25 17:28:24,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207436489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:24,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:24,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491259974] [2022-11-25 17:28:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:24,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 129 [2022-11-25 17:28:24,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:24,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 129 [2022-11-25 17:28:24,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:24,471 INFO L130 PetriNetUnfolder]: 1166/2004 cut-off events. [2022-11-25 17:28:24,471 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-25 17:28:24,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 2004 events. 1166/2004 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12544 event pairs, 908 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3750. Up to 1634 conditions per place. [2022-11-25 17:28:24,489 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 20 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-11-25 17:28:24,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 129 flow [2022-11-25 17:28:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2022-11-25 17:28:24,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2022-11-25 17:28:24,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2022-11-25 17:28:24,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2022-11-25 17:28:24,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:24,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2022-11-25 17:28:24,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,494 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 89 flow. Second operand 3 states and 187 transitions. [2022-11-25 17:28:24,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 129 flow [2022-11-25 17:28:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:24,496 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 89 flow [2022-11-25 17:28:24,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2022-11-25 17:28:24,497 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2022-11-25 17:28:24,497 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 89 flow [2022-11-25 17:28:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:24,498 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:28:24,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash 17884, now seen corresponding path program 1 times [2022-11-25 17:28:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:24,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358957166] [2022-11-25 17:28:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:24,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:24,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358957166] [2022-11-25 17:28:24,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358957166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:24,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:24,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:24,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342829504] [2022-11-25 17:28:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:24,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:24,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:24,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 129 [2022-11-25 17:28:24,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:24,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 129 [2022-11-25 17:28:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:24,767 INFO L130 PetriNetUnfolder]: 736/1318 cut-off events. [2022-11-25 17:28:24,767 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-25 17:28:24,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1318 events. 736/1318 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7738 event pairs, 564 based on Foata normal form. 0/1042 useless extension candidates. Maximal degree in co-relation 2479. Up to 1048 conditions per place. [2022-11-25 17:28:24,779 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 19 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2022-11-25 17:28:24,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 127 flow [2022-11-25 17:28:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-11-25 17:28:24,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2022-11-25 17:28:24,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-11-25 17:28:24,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-11-25 17:28:24,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:24,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-11-25 17:28:24,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,784 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 89 flow. Second operand 3 states and 183 transitions. [2022-11-25 17:28:24,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 127 flow [2022-11-25 17:28:24,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:24,786 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 88 flow [2022-11-25 17:28:24,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-11-25 17:28:24,790 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2022-11-25 17:28:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 88 flow [2022-11-25 17:28:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:24,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:24,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:28:24,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash -755749298, now seen corresponding path program 1 times [2022-11-25 17:28:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:24,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507973450] [2022-11-25 17:28:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:24,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:24,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507973450] [2022-11-25 17:28:24,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507973450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:24,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:24,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:24,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486928146] [2022-11-25 17:28:24,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:24,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:24,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:25,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 129 [2022-11-25 17:28:25,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:25,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:25,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 129 [2022-11-25 17:28:25,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:25,815 INFO L130 PetriNetUnfolder]: 3340/4906 cut-off events. [2022-11-25 17:28:25,815 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2022-11-25 17:28:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10044 conditions, 4906 events. 3340/4906 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 28465 event pairs, 1049 based on Foata normal form. 44/4286 useless extension candidates. Maximal degree in co-relation 10037. Up to 2052 conditions per place. [2022-11-25 17:28:25,865 INFO L137 encePairwiseOnDemand]: 119/129 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-11-25 17:28:25,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 90 transitions, 392 flow [2022-11-25 17:28:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:28:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:28:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2022-11-25 17:28:25,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5090439276485789 [2022-11-25 17:28:25,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2022-11-25 17:28:25,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2022-11-25 17:28:25,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:25,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2022-11-25 17:28:25,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:25,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:25,933 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:25,933 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 6 states and 394 transitions. [2022-11-25 17:28:25,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 90 transitions, 392 flow [2022-11-25 17:28:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 90 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:25,936 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 178 flow [2022-11-25 17:28:25,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2022-11-25 17:28:25,937 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2022-11-25 17:28:25,937 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 178 flow [2022-11-25 17:28:25,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:25,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:25,938 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:28:25,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1614829446, now seen corresponding path program 1 times [2022-11-25 17:28:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8392639] [2022-11-25 17:28:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:28:26,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8392639] [2022-11-25 17:28:26,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8392639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:26,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:26,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:26,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247429291] [2022-11-25 17:28:26,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:26,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 129 [2022-11-25 17:28:26,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:26,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:26,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 129 [2022-11-25 17:28:26,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:27,564 INFO L130 PetriNetUnfolder]: 5434/8184 cut-off events. [2022-11-25 17:28:27,565 INFO L131 PetriNetUnfolder]: For 3244/3296 co-relation queries the response was YES. [2022-11-25 17:28:27,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 8184 events. 5434/8184 cut-off events. For 3244/3296 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54680 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 19115. Up to 3679 conditions per place. [2022-11-25 17:28:27,658 INFO L137 encePairwiseOnDemand]: 122/129 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2022-11-25 17:28:27,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 103 transitions, 568 flow [2022-11-25 17:28:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:28:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:28:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 388 transitions. [2022-11-25 17:28:27,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2022-11-25 17:28:27,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 388 transitions. [2022-11-25 17:28:27,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 388 transitions. [2022-11-25 17:28:27,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:27,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 388 transitions. [2022-11-25 17:28:27,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 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) [2022-11-25 17:28:27,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:27,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:27,668 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 178 flow. Second operand 6 states and 388 transitions. [2022-11-25 17:28:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 103 transitions, 568 flow [2022-11-25 17:28:27,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:27,682 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 308 flow [2022-11-25 17:28:27,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2022-11-25 17:28:27,685 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2022-11-25 17:28:27,685 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 308 flow [2022-11-25 17:28:27,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:27,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:27,686 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:28:27,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:28:27,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:28:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1127323290, now seen corresponding path program 1 times [2022-11-25 17:28:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551403919] [2022-11-25 17:28:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:27,711 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:28:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:28:27,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:28:27,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:28:27,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-25 17:28:27,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-11-25 17:28:27,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-25 17:28:27,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:28:27,779 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 17:28:27,779 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:28:27,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:28:27,812 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:28:27,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,834 INFO L130 PetriNetUnfolder]: 9/165 cut-off events. [2022-11-25 17:28:27,834 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:28:27,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 165 events. 9/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 430 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 140. Up to 10 conditions per place. [2022-11-25 17:28:27,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,837 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:27,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 95 transitions, 222 flow [2022-11-25 17:28:27,855 INFO L130 PetriNetUnfolder]: 9/165 cut-off events. [2022-11-25 17:28:27,855 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:28:27,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 165 events. 9/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 430 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 140. Up to 10 conditions per place. [2022-11-25 17:28:27,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 4648 [2022-11-25 17:28:30,528 INFO L134 LiptonReduction]: Checked pairs total: 20174 [2022-11-25 17:28:30,528 INFO L136 LiptonReduction]: Total number of compositions: 55 [2022-11-25 17:28:30,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:30,530 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;@6376b3ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:30,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 17:28:30,534 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:28:30,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:30,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:30,535 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:30,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash 23160, now seen corresponding path program 1 times [2022-11-25 17:28:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453868032] [2022-11-25 17:28:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453868032] [2022-11-25 17:28:30,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453868032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:30,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:30,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:30,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807123957] [2022-11-25 17:28:30,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:28:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:28:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:28:30,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 150 [2022-11-25 17:28:30,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:30,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:30,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 150 [2022-11-25 17:28:30,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:32,682 INFO L130 PetriNetUnfolder]: 11096/16570 cut-off events. [2022-11-25 17:28:32,682 INFO L131 PetriNetUnfolder]: For 1921/1921 co-relation queries the response was YES. [2022-11-25 17:28:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31938 conditions, 16570 events. 11096/16570 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 118087 event pairs, 8752 based on Foata normal form. 0/11828 useless extension candidates. Maximal degree in co-relation 5138. Up to 14221 conditions per place. [2022-11-25 17:28:32,852 INFO L137 encePairwiseOnDemand]: 148/150 looper letters, 28 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2022-11-25 17:28:32,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 182 flow [2022-11-25 17:28:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:28:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:28:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 168 transitions. [2022-11-25 17:28:32,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.56 [2022-11-25 17:28:32,855 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 168 transitions. [2022-11-25 17:28:32,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 168 transitions. [2022-11-25 17:28:32,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:32,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 168 transitions. [2022-11-25 17:28:32,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:32,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:32,861 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:32,861 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 130 flow. Second operand 2 states and 168 transitions. [2022-11-25 17:28:32,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 182 flow [2022-11-25 17:28:32,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 170 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:32,867 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 114 flow [2022-11-25 17:28:32,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-11-25 17:28:32,870 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2022-11-25 17:28:32,870 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 114 flow [2022-11-25 17:28:32,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:32,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:32,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:32,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:28:32,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash 23164, now seen corresponding path program 1 times [2022-11-25 17:28:32,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:32,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187644558] [2022-11-25 17:28:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:32,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:32,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187644558] [2022-11-25 17:28:32,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187644558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:32,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:32,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:32,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840352810] [2022-11-25 17:28:32,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:32,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:32,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:32,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 150 [2022-11-25 17:28:32,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:32,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:32,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 150 [2022-11-25 17:28:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:34,366 INFO L130 PetriNetUnfolder]: 8166/12359 cut-off events. [2022-11-25 17:28:34,366 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-25 17:28:34,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23442 conditions, 12359 events. 8166/12359 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 85821 event pairs, 6408 based on Foata normal form. 0/9140 useless extension candidates. Maximal degree in co-relation 23435. Up to 10509 conditions per place. [2022-11-25 17:28:34,466 INFO L137 encePairwiseOnDemand]: 148/150 looper letters, 26 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-11-25 17:28:34,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 166 flow [2022-11-25 17:28:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2022-11-25 17:28:34,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4822222222222222 [2022-11-25 17:28:34,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2022-11-25 17:28:34,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2022-11-25 17:28:34,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:34,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2022-11-25 17:28:34,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,472 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 114 flow. Second operand 3 states and 217 transitions. [2022-11-25 17:28:34,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 166 flow [2022-11-25 17:28:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:34,476 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 114 flow [2022-11-25 17:28:34,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2022-11-25 17:28:34,477 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2022-11-25 17:28:34,477 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 114 flow [2022-11-25 17:28:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:34,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:28:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:28:34,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 23165, now seen corresponding path program 1 times [2022-11-25 17:28:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614773169] [2022-11-25 17:28:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614773169] [2022-11-25 17:28:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614773169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:34,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143441470] [2022-11-25 17:28:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:34,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:34,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:34,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2022-11-25 17:28:34,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:34,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2022-11-25 17:28:34,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:35,496 INFO L130 PetriNetUnfolder]: 5236/8148 cut-off events. [2022-11-25 17:28:35,497 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-25 17:28:35,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15522 conditions, 8148 events. 5236/8148 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 54780 event pairs, 4064 based on Foata normal form. 0/6452 useless extension candidates. Maximal degree in co-relation 15514. Up to 6798 conditions per place. [2022-11-25 17:28:35,560 INFO L137 encePairwiseOnDemand]: 148/150 looper letters, 25 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:28:35,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 164 flow [2022-11-25 17:28:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-25 17:28:35,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2022-11-25 17:28:35,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-25 17:28:35,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-25 17:28:35,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:35,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-25 17:28:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:35,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:35,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:35,568 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 114 flow. Second operand 3 states and 222 transitions. [2022-11-25 17:28:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 164 flow [2022-11-25 17:28:35,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:35,570 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 113 flow [2022-11-25 17:28:35,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 17:28:35,572 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2022-11-25 17:28:35,572 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 113 flow [2022-11-25 17:28:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:35,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:35,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:28:35,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash 677300864, now seen corresponding path program 1 times [2022-11-25 17:28:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756859344] [2022-11-25 17:28:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:35,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756859344] [2022-11-25 17:28:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756859344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:35,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:35,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:35,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615965283] [2022-11-25 17:28:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:35,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 150 [2022-11-25 17:28:35,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:35,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:35,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 150 [2022-11-25 17:28:35,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:40,540 INFO L130 PetriNetUnfolder]: 38126/50056 cut-off events. [2022-11-25 17:28:40,540 INFO L131 PetriNetUnfolder]: For 2284/2284 co-relation queries the response was YES. [2022-11-25 17:28:40,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102342 conditions, 50056 events. 38126/50056 cut-off events. For 2284/2284 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300496 event pairs, 13503 based on Foata normal form. 132/43544 useless extension candidates. Maximal degree in co-relation 102334. Up to 22160 conditions per place. [2022-11-25 17:28:40,869 INFO L137 encePairwiseOnDemand]: 138/150 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2022-11-25 17:28:40,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 541 flow [2022-11-25 17:28:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:28:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:28:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2022-11-25 17:28:40,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52 [2022-11-25 17:28:40,872 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2022-11-25 17:28:40,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2022-11-25 17:28:40,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:40,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2022-11-25 17:28:40,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,878 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,879 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 113 flow. Second operand 6 states and 468 transitions. [2022-11-25 17:28:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 541 flow [2022-11-25 17:28:40,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 122 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:40,884 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 230 flow [2022-11-25 17:28:40,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2022-11-25 17:28:40,884 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2022-11-25 17:28:40,885 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 230 flow [2022-11-25 17:28:40,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:40,885 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:40,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:28:40,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1771536150, now seen corresponding path program 1 times [2022-11-25 17:28:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:40,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927236019] [2022-11-25 17:28:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:28:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927236019] [2022-11-25 17:28:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927236019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:40,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:40,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886209525] [2022-11-25 17:28:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:41,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 150 [2022-11-25 17:28:41,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:41,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:41,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 150 [2022-11-25 17:28:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:50,294 INFO L130 PetriNetUnfolder]: 72724/96946 cut-off events. [2022-11-25 17:28:50,295 INFO L131 PetriNetUnfolder]: For 45539/45987 co-relation queries the response was YES. [2022-11-25 17:28:50,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231616 conditions, 96946 events. 72724/96946 cut-off events. For 45539/45987 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 659453 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 231604. Up to 44665 conditions per place. [2022-11-25 17:28:51,047 INFO L137 encePairwiseOnDemand]: 142/150 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2022-11-25 17:28:51,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 144 transitions, 803 flow [2022-11-25 17:28:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:28:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:28:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2022-11-25 17:28:51,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2022-11-25 17:28:51,050 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 460 transitions. [2022-11-25 17:28:51,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 460 transitions. [2022-11-25 17:28:51,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:51,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 460 transitions. [2022-11-25 17:28:51,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:51,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:51,056 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:51,056 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 230 flow. Second operand 6 states and 460 transitions. [2022-11-25 17:28:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 144 transitions, 803 flow [2022-11-25 17:28:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 144 transitions, 803 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:51,247 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 401 flow [2022-11-25 17:28:51,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2022-11-25 17:28:51,248 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2022-11-25 17:28:51,248 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 401 flow [2022-11-25 17:28:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:51,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:51,249 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:28:51,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:28:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1799297587, now seen corresponding path program 1 times [2022-11-25 17:28:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:51,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310556132] [2022-11-25 17:28:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:28:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310556132] [2022-11-25 17:28:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310556132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:51,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:51,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140024584] [2022-11-25 17:28:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:51,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 150 [2022-11-25 17:28:51,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:51,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:51,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 150 [2022-11-25 17:28:51,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:08,957 INFO L130 PetriNetUnfolder]: 123863/167541 cut-off events. [2022-11-25 17:29:08,957 INFO L131 PetriNetUnfolder]: For 138554/141594 co-relation queries the response was YES. [2022-11-25 17:29:09,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425198 conditions, 167541 events. 123863/167541 cut-off events. For 138554/141594 co-relation queries the response was YES. Maximal size of possible extension queue 9040. Compared 1262274 event pairs, 44995 based on Foata normal form. 2956/157399 useless extension candidates. Maximal degree in co-relation 425183. Up to 80186 conditions per place. [2022-11-25 17:29:10,680 INFO L137 encePairwiseOnDemand]: 142/150 looper letters, 121 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2022-11-25 17:29:10,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 170 transitions, 1173 flow [2022-11-25 17:29:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:29:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:29:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 457 transitions. [2022-11-25 17:29:10,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5077777777777778 [2022-11-25 17:29:10,685 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 457 transitions. [2022-11-25 17:29:10,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 457 transitions. [2022-11-25 17:29:10,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:10,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 457 transitions. [2022-11-25 17:29:10,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.16666666666667) internal successors, (457), 6 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:10,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:10,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:10,691 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 401 flow. Second operand 6 states and 457 transitions. [2022-11-25 17:29:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 170 transitions, 1173 flow [2022-11-25 17:29:11,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 170 transitions, 1173 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:29:11,436 INFO L231 Difference]: Finished difference. Result has 76 places, 100 transitions, 703 flow [2022-11-25 17:29:11,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=703, PETRI_PLACES=76, PETRI_TRANSITIONS=100} [2022-11-25 17:29:11,437 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2022-11-25 17:29:11,437 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 100 transitions, 703 flow [2022-11-25 17:29:11,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:11,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:11,438 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:29:11,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:29:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 582739602, now seen corresponding path program 1 times [2022-11-25 17:29:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531263922] [2022-11-25 17:29:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:11,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531263922] [2022-11-25 17:29:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531263922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:11,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654889457] [2022-11-25 17:29:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:11,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:11,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:11,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3289ce0-4d7d-4662-8b83-a1a2c35125fc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:29:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:29:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:11,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:12,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654889457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:12,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:12,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-11-25 17:29:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316031407] [2022-11-25 17:29:12,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:29:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:29:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:29:12,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 150 [2022-11-25 17:29:12,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 100 transitions, 703 flow. Second operand has 15 states, 15 states have (on average 53.266666666666666) internal successors, (799), 15 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:12,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:12,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 150 [2022-11-25 17:29:12,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand