./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe000_power.opt.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_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/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_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe000_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/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_63983471-8b81-4160-8b36-272b58037747/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 23eea01b75afdbb0ef381e4ddf0b030c295f59ec7a283af707e459bd9dd9c0c0 --- 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 15:42:46,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:42:46,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:42:46,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:42:46,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:42:46,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:42:46,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:42:46,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:42:46,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:42:46,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:42:46,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:42:46,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:42:46,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:42:46,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:42:46,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:42:46,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:42:46,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:42:46,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:42:46,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:42:46,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:42:46,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:42:46,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:42:46,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:42:46,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:42:46,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:42:46,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:42:46,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:42:46,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:42:46,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:42:46,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:42:46,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:42:46,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:42:46,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:42:46,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:42:46,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:42:46,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:42:46,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:42:46,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:42:46,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:42:46,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:42:46,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:42:46,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:42:46,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:42:46,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:42:46,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:42:46,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:42:46,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:42:46,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:42:46,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:42:46,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:42:46,979 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:42:46,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:42:46,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:42:46,980 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:42:46,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:42:46,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:42:46,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:42:46,981 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:42:46,982 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:42:46,982 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:42:46,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:42:46,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:42:46,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:42:46,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:42:46,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:42:46,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:42:46,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:42:46,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:42:46,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:42:46,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:42:46,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:42:46,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:42:46,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:42:46,986 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:42:46,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:42:46,986 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_63983471-8b81-4160-8b36-272b58037747/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23eea01b75afdbb0ef381e4ddf0b030c295f59ec7a283af707e459bd9dd9c0c0 [2022-11-25 15:42:47,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:42:47,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:42:47,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:42:47,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:42:47,323 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:42:47,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-wmm/safe000_power.opt.i [2022-11-25 15:42:50,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:42:50,761 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:42:50,762 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/sv-benchmarks/c/pthread-wmm/safe000_power.opt.i [2022-11-25 15:42:50,790 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/data/2cdee3ba2/482140baf9c94238a8978b8d20e1b59e/FLAG18a52d268 [2022-11-25 15:42:50,808 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/data/2cdee3ba2/482140baf9c94238a8978b8d20e1b59e [2022-11-25 15:42:50,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:42:50,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:42:50,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:42:50,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:42:50,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:42:50,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:42:50" (1/1) ... [2022-11-25 15:42:50,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb735d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:50, skipping insertion in model container [2022-11-25 15:42:50,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:42:50" (1/1) ... [2022-11-25 15:42:50,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:42:50,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:42:51,122 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_63983471-8b81-4160-8b36-272b58037747/sv-benchmarks/c/pthread-wmm/safe000_power.opt.i[951,964] [2022-11-25 15:42:51,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,313 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,317 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,372 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,384 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,385 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,405 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,408 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,408 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,410 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:42:51,435 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:42:51,447 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_63983471-8b81-4160-8b36-272b58037747/sv-benchmarks/c/pthread-wmm/safe000_power.opt.i[951,964] [2022-11-25 15:42:51,467 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,473 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,473 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,474 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,485 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,487 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:42:51,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:42:51,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:42:51,543 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:42:51,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51 WrapperNode [2022-11-25 15:42:51,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:42:51,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:42:51,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:42:51,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:42:51,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,597 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 180 [2022-11-25 15:42:51,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:42:51,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:42:51,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:42:51,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:42:51,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:42:51,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:42:51,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:42:51,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:42:51,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (1/1) ... [2022-11-25 15:42:51,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:42:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:51,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:42:51,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63983471-8b81-4160-8b36-272b58037747/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:42:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:42:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:42:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:42:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:42:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:42:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:42:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-25 15:42:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-25 15:42:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-25 15:42:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-25 15:42:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-25 15:42:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-25 15:42:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:42:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:42:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:42:51,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:42:51,758 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 15:42:51,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:42:51,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:42:52,682 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:42:53,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:42:53,388 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 15:42:53,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:42:53 BoogieIcfgContainer [2022-11-25 15:42:53,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:42:53,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:42:53,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:42:53,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:42:53,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:42:50" (1/3) ... [2022-11-25 15:42:53,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7003f506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:42:53, skipping insertion in model container [2022-11-25 15:42:53,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:51" (2/3) ... [2022-11-25 15:42:53,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7003f506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:42:53, skipping insertion in model container [2022-11-25 15:42:53,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:42:53" (3/3) ... [2022-11-25 15:42:53,405 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.opt.i [2022-11-25 15:42:53,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:42:53,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2022-11-25 15:42:53,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:42:53,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:42:53,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 178 transitions, 371 flow [2022-11-25 15:42:53,790 INFO L130 PetriNetUnfolder]: 2/175 cut-off events. [2022-11-25 15:42:53,790 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:42:53,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 175 events. 2/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 244 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-11-25 15:42:53,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 178 transitions, 371 flow [2022-11-25 15:42:53,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 175 transitions, 359 flow [2022-11-25 15:42:53,808 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:42:53,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 175 transitions, 359 flow [2022-11-25 15:42:53,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 175 transitions, 359 flow [2022-11-25 15:42:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 175 transitions, 359 flow [2022-11-25 15:42:53,886 INFO L130 PetriNetUnfolder]: 2/175 cut-off events. [2022-11-25 15:42:53,887 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:42:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 175 events. 2/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 244 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-11-25 15:42:53,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 6624 [2022-11-25 15:43:12,517 INFO L134 LiptonReduction]: Checked pairs total: 33676 [2022-11-25 15:43:12,517 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-11-25 15:43:12,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:43:12,540 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;@2c6d0cec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:43:12,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-25 15:43:12,542 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 15:43:12,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:43:12,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:12,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 15:43:12,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1135, now seen corresponding path program 1 times [2022-11-25 15:43:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295400279] [2022-11-25 15:43:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:12,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:12,677 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 15:43:12,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295400279] [2022-11-25 15:43:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295400279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:12,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:12,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 15:43:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766378961] [2022-11-25 15:43:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:12,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:43:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:43:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:43:12,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 332 [2022-11-25 15:43:12,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 149 flow. Second operand has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 15:43:12,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:12,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 332 [2022-11-25 15:43:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:21,464 INFO L130 PetriNetUnfolder]: 31868/44408 cut-off events. [2022-11-25 15:43:21,464 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 15:43:21,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88834 conditions, 44408 events. 31868/44408 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3425. Compared 316534 event pairs, 31868 based on Foata normal form. 0/17753 useless extension candidates. Maximal degree in co-relation 88823. Up to 44200 conditions per place. [2022-11-25 15:43:21,784 INFO L137 encePairwiseOnDemand]: 311/332 looper letters, 47 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2022-11-25 15:43:21,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 201 flow [2022-11-25 15:43:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:43:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:43:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 328 transitions. [2022-11-25 15:43:21,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4939759036144578 [2022-11-25 15:43:21,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 328 transitions. [2022-11-25 15:43:21,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 328 transitions. [2022-11-25 15:43:21,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 328 transitions. [2022-11-25 15:43:21,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 15:43:21,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 15:43:21,828 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 15:43:21,830 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 149 flow. Second operand 2 states and 328 transitions. [2022-11-25 15:43:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 201 flow [2022-11-25 15:43:21,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:43:21,845 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 104 flow [2022-11-25 15:43:21,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2022-11-25 15:43:21,852 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -22 predicate places. [2022-11-25 15:43:21,853 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 104 flow [2022-11-25 15:43:21,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 15:43:21,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:21,854 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:43:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:43:21,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash 34786216, now seen corresponding path program 1 times [2022-11-25 15:43:21,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683760733] [2022-11-25 15:43:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:22,199 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 15:43:22,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683760733] [2022-11-25 15:43:22,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683760733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:22,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:22,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:43:22,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295716084] [2022-11-25 15:43:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:22,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 332 [2022-11-25 15:43:22,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 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 15:43:22,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:22,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 332 [2022-11-25 15:43:22,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:29,063 INFO L130 PetriNetUnfolder]: 28558/39698 cut-off events. [2022-11-25 15:43:29,064 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:43:29,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79557 conditions, 39698 events. 28558/39698 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3091. Compared 303146 event pairs, 5388 based on Foata normal form. 0/16822 useless extension candidates. Maximal degree in co-relation 79554. Up to 31802 conditions per place. [2022-11-25 15:43:29,278 INFO L137 encePairwiseOnDemand]: 329/332 looper letters, 80 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-25 15:43:29,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 342 flow [2022-11-25 15:43:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2022-11-25 15:43:29,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4718875502008032 [2022-11-25 15:43:29,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2022-11-25 15:43:29,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2022-11-25 15:43:29,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:29,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2022-11-25 15:43:29,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:29,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:29,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:29,294 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 104 flow. Second operand 3 states and 470 transitions. [2022-11-25 15:43:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 342 flow [2022-11-25 15:43:29,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:43:29,298 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 106 flow [2022-11-25 15:43:29,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2022-11-25 15:43:29,302 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -21 predicate places. [2022-11-25 15:43:29,303 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 106 flow [2022-11-25 15:43:29,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 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 15:43:29,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:29,304 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:43:29,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:43:29,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1078373628, now seen corresponding path program 1 times [2022-11-25 15:43:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:29,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796160205] [2022-11-25 15:43:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:29,685 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 15:43:29,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796160205] [2022-11-25 15:43:29,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796160205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:29,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:29,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:43:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237669522] [2022-11-25 15:43:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:29,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 332 [2022-11-25 15:43:29,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:29,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:29,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 332 [2022-11-25 15:43:29,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:34,144 INFO L130 PetriNetUnfolder]: 17406/25461 cut-off events. [2022-11-25 15:43:34,144 INFO L131 PetriNetUnfolder]: For 920/920 co-relation queries the response was YES. [2022-11-25 15:43:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51643 conditions, 25461 events. 17406/25461 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 180733 event pairs, 10856 based on Foata normal form. 0/13642 useless extension candidates. Maximal degree in co-relation 51639. Up to 14741 conditions per place. [2022-11-25 15:43:34,283 INFO L137 encePairwiseOnDemand]: 314/332 looper letters, 55 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2022-11-25 15:43:34,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 272 flow [2022-11-25 15:43:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2022-11-25 15:43:34,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4528112449799197 [2022-11-25 15:43:34,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2022-11-25 15:43:34,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2022-11-25 15:43:34,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:34,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2022-11-25 15:43:34,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 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 15:43:34,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:34,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:34,300 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 106 flow. Second operand 3 states and 451 transitions. [2022-11-25 15:43:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 272 flow [2022-11-25 15:43:34,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:43:34,304 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 176 flow [2022-11-25 15:43:34,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2022-11-25 15:43:34,306 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -21 predicate places. [2022-11-25 15:43:34,306 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 176 flow [2022-11-25 15:43:34,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:34,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:34,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:43:34,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:43:34,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1078373629, now seen corresponding path program 1 times [2022-11-25 15:43:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624589593] [2022-11-25 15:43:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:34,459 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 15:43:34,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:34,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624589593] [2022-11-25 15:43:34,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624589593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:34,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:34,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:43:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161309371] [2022-11-25 15:43:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:34,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 332 [2022-11-25 15:43:34,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 15:43:34,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:34,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 332 [2022-11-25 15:43:34,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:38,858 INFO L130 PetriNetUnfolder]: 22395/32517 cut-off events. [2022-11-25 15:43:38,858 INFO L131 PetriNetUnfolder]: For 8376/8376 co-relation queries the response was YES. [2022-11-25 15:43:38,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82390 conditions, 32517 events. 22395/32517 cut-off events. For 8376/8376 co-relation queries the response was YES. Maximal size of possible extension queue 2288. Compared 240711 event pairs, 12785 based on Foata normal form. 0/24204 useless extension candidates. Maximal degree in co-relation 82385. Up to 25676 conditions per place. [2022-11-25 15:43:39,042 INFO L137 encePairwiseOnDemand]: 322/332 looper letters, 83 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-11-25 15:43:39,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 97 transitions, 516 flow [2022-11-25 15:43:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2022-11-25 15:43:39,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46887550200803213 [2022-11-25 15:43:39,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2022-11-25 15:43:39,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2022-11-25 15:43:39,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:39,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2022-11-25 15:43:39,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:39,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:39,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:39,051 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 176 flow. Second operand 3 states and 467 transitions. [2022-11-25 15:43:39,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 97 transitions, 516 flow [2022-11-25 15:43:39,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 97 transitions, 482 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:43:39,107 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 258 flow [2022-11-25 15:43:39,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2022-11-25 15:43:39,109 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -20 predicate places. [2022-11-25 15:43:39,109 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 258 flow [2022-11-25 15:43:39,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 15:43:39,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:39,110 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:43:39,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:43:39,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1078373631, now seen corresponding path program 1 times [2022-11-25 15:43:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968476509] [2022-11-25 15:43:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:39,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:39,300 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 15:43:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:39,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968476509] [2022-11-25 15:43:39,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968476509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:39,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:39,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:43:39,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170694274] [2022-11-25 15:43:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:39,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 332 [2022-11-25 15:43:39,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 15:43:39,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:39,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 332 [2022-11-25 15:43:39,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:40,957 INFO L130 PetriNetUnfolder]: 6499/9896 cut-off events. [2022-11-25 15:43:40,957 INFO L131 PetriNetUnfolder]: For 5397/5624 co-relation queries the response was YES. [2022-11-25 15:43:40,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29711 conditions, 9896 events. 6499/9896 cut-off events. For 5397/5624 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 63222 event pairs, 4595 based on Foata normal form. 2833/11139 useless extension candidates. Maximal degree in co-relation 29705. Up to 9724 conditions per place. [2022-11-25 15:43:41,014 INFO L137 encePairwiseOnDemand]: 322/332 looper letters, 52 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-11-25 15:43:41,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 344 flow [2022-11-25 15:43:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2022-11-25 15:43:41,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327309236947791 [2022-11-25 15:43:41,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2022-11-25 15:43:41,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2022-11-25 15:43:41,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:41,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2022-11-25 15:43:41,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 15:43:41,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:41,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:41,028 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 258 flow. Second operand 3 states and 431 transitions. [2022-11-25 15:43:41,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 344 flow [2022-11-25 15:43:41,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:43:41,034 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 228 flow [2022-11-25 15:43:41,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2022-11-25 15:43:41,037 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -28 predicate places. [2022-11-25 15:43:41,037 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 228 flow [2022-11-25 15:43:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 15:43:41,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:41,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:43:41,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1274469832, now seen corresponding path program 1 times [2022-11-25 15:43:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:41,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544564610] [2022-11-25 15:43:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:41,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,191 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 15:43:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544564610] [2022-11-25 15:43:41,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544564610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:41,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:41,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:43:41,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107370516] [2022-11-25 15:43:41,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:41,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:41,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 332 [2022-11-25 15:43:41,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 15:43:41,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:41,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 332 [2022-11-25 15:43:41,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:42,969 INFO L130 PetriNetUnfolder]: 6379/9809 cut-off events. [2022-11-25 15:43:42,969 INFO L131 PetriNetUnfolder]: For 3871/3931 co-relation queries the response was YES. [2022-11-25 15:43:42,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28520 conditions, 9809 events. 6379/9809 cut-off events. For 3871/3931 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 64252 event pairs, 2560 based on Foata normal form. 4/8315 useless extension candidates. Maximal degree in co-relation 28514. Up to 7567 conditions per place. [2022-11-25 15:43:43,031 INFO L137 encePairwiseOnDemand]: 328/332 looper letters, 80 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2022-11-25 15:43:43,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 526 flow [2022-11-25 15:43:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-11-25 15:43:43,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44779116465863456 [2022-11-25 15:43:43,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-11-25 15:43:43,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-11-25 15:43:43,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:43,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-11-25 15:43:43,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 15:43:43,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:43,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 15:43:43,042 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 228 flow. Second operand 3 states and 446 transitions. [2022-11-25 15:43:43,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 526 flow [2022-11-25 15:43:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:43:43,046 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 250 flow [2022-11-25 15:43:43,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2022-11-25 15:43:43,050 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -26 predicate places. [2022-11-25 15:43:43,050 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 250 flow [2022-11-25 15:43:43,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 15:43:43,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:43,052 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:43:43,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 853860814, now seen corresponding path program 1 times [2022-11-25 15:43:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560075846] [2022-11-25 15:43:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:43,442 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 15:43:43,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560075846] [2022-11-25 15:43:43,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560075846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:43,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:43,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:43:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251176231] [2022-11-25 15:43:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:43,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:43:43,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:43:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:43:43,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 332 [2022-11-25 15:43:43,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 15:43:43,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:43,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 332 [2022-11-25 15:43:43,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:46,486 INFO L130 PetriNetUnfolder]: 10723/16385 cut-off events. [2022-11-25 15:43:46,486 INFO L131 PetriNetUnfolder]: For 6682/6750 co-relation queries the response was YES. [2022-11-25 15:43:46,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48640 conditions, 16385 events. 10723/16385 cut-off events. For 6682/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 117228 event pairs, 2940 based on Foata normal form. 18/13947 useless extension candidates. Maximal degree in co-relation 48633. Up to 6863 conditions per place. [2022-11-25 15:43:46,605 INFO L137 encePairwiseOnDemand]: 327/332 looper letters, 142 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2022-11-25 15:43:46,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 155 transitions, 962 flow [2022-11-25 15:43:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:43:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:43:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2022-11-25 15:43:46,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44096385542168676 [2022-11-25 15:43:46,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2022-11-25 15:43:46,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2022-11-25 15:43:46,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:46,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2022-11-25 15:43:46,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 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 15:43:46,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 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 15:43:46,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 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 15:43:46,617 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 250 flow. Second operand 5 states and 732 transitions. [2022-11-25 15:43:46,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 155 transitions, 962 flow [2022-11-25 15:43:46,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 155 transitions, 948 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:43:46,625 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 304 flow [2022-11-25 15:43:46,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2022-11-25 15:43:46,626 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -22 predicate places. [2022-11-25 15:43:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 304 flow [2022-11-25 15:43:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 15:43:46,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:46,627 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:46,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:43:46,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 15:43:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 853860813, now seen corresponding path program 1 times [2022-11-25 15:43:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:46,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792879060] [2022-11-25 15:43:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:46,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:46,946 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 15:43:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792879060] [2022-11-25 15:43:46,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792879060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:46,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:46,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:43:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512170756] [2022-11-25 15:43:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:46,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:43:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:43:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:43:47,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 332 [2022-11-25 15:43:47,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 15:43:47,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:47,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 332 [2022-11-25 15:43:47,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand