./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/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_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/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_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/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 a9d301fd24d7dbc3684a100e80ac453023513d8631f488025251adcc1a8646b5 --- 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 16:49:49,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:49:49,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:49:49,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:49:49,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:49:49,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:49:49,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:49:49,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:49:49,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:49:49,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:49:49,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:49:49,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:49:49,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:49:49,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:49:49,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:49:49,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:49:49,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:49:49,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:49:49,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:49:49,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:49:49,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:49:49,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:49:49,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:49:49,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:49:49,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:49:49,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:49:49,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:49:49,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:49:49,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:49:49,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:49:49,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:49:49,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:49:49,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:49:49,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:49:49,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:49:49,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:49:49,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:49:49,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:49:49,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:49:49,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:49:49,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:49:49,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:49:49,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:49:49,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:49:49,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:49:49,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:49:49,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:49:49,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:49:49,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:49:49,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:49:49,651 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:49:49,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:49:49,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:49:49,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:49:49,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:49:49,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:49:49,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:49:49,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:49:49,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:49:49,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:49:49,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:49:49,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:49:49,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:49:49,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:49:49,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:49:49,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:49:49,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:49:49,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:49:49,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:49:49,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:49:49,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:49:49,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:49:49,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:49:49,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:49:49,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:49:49,657 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_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d301fd24d7dbc3684a100e80ac453023513d8631f488025251adcc1a8646b5 [2022-11-25 16:49:49,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:49:49,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:49:49,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:49:49,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:49:49,951 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:49:49,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i [2022-11-25 16:49:53,035 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:49:53,327 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:49:53,328 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i [2022-11-25 16:49:53,354 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/data/a6e717e4c/a83e333b893844cfa98e59f7b241a86f/FLAG858c454fb [2022-11-25 16:49:53,368 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/data/a6e717e4c/a83e333b893844cfa98e59f7b241a86f [2022-11-25 16:49:53,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:49:53,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:49:53,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:49:53,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:49:53,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:49:53,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:49:53" (1/1) ... [2022-11-25 16:49:53,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233fc7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:53, skipping insertion in model container [2022-11-25 16:49:53,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:49:53" (1/1) ... [2022-11-25 16:49:53,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:49:53,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:49:53,634 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_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i[995,1008] [2022-11-25 16:49:53,896 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:53,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:53,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:49:54,031 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:49:54,044 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_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i[995,1008] [2022-11-25 16:49:54,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,110 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,110 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,114 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,114 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,152 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,152 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,154 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:49:54,156 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:49:54,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:49:54,195 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:49:54,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54 WrapperNode [2022-11-25 16:49:54,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:49:54,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:49:54,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:49:54,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:49:54,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,249 INFO L138 Inliner]: procedures = 177, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 152 [2022-11-25 16:49:54,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:49:54,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:49:54,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:49:54,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:49:54,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:49:54,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:49:54,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:49:54,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:49:54,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (1/1) ... [2022-11-25 16:49:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:49:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:54,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:49:54,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285968e9-b098-48dd-9e7f-19e6ce2ab7a4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:49:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:49:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:49:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 16:49:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:49:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:49:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:49:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-25 16:49:54,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-25 16:49:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-25 16:49:54,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-25 16:49:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-25 16:49:54,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-25 16:49:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-11-25 16:49:54,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-11-25 16:49:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:49:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 16:49:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:49:54,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:49:54,396 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 16:49:54,665 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:49:54,667 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:49:55,348 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:49:56,159 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:49:56,159 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 16:49:56,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:49:56 BoogieIcfgContainer [2022-11-25 16:49:56,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:49:56,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:49:56,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:49:56,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:49:56,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:49:53" (1/3) ... [2022-11-25 16:49:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d267c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:49:56, skipping insertion in model container [2022-11-25 16:49:56,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:49:54" (2/3) ... [2022-11-25 16:49:56,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d267c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:49:56, skipping insertion in model container [2022-11-25 16:49:56,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:49:56" (3/3) ... [2022-11-25 16:49:56,172 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2022-11-25 16:49:56,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:49:56,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2022-11-25 16:49:56,195 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:49:56,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:49:56,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 424 flow [2022-11-25 16:49:56,571 INFO L130 PetriNetUnfolder]: 2/198 cut-off events. [2022-11-25 16:49:56,571 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:49:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 2/198 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 283 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-25 16:49:56,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 424 flow [2022-11-25 16:49:56,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 198 transitions, 408 flow [2022-11-25 16:49:56,596 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:49:56,617 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 198 transitions, 408 flow [2022-11-25 16:49:56,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 198 transitions, 408 flow [2022-11-25 16:49:56,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 408 flow [2022-11-25 16:49:56,722 INFO L130 PetriNetUnfolder]: 2/198 cut-off events. [2022-11-25 16:49:56,722 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:49:56,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 2/198 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 284 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-25 16:49:56,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 8980 [2022-11-25 16:50:29,863 INFO L134 LiptonReduction]: Checked pairs total: 28212 [2022-11-25 16:50:29,864 INFO L136 LiptonReduction]: Total number of compositions: 192 [2022-11-25 16:50:29,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:50:29,885 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;@7eb634ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:50:29,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2022-11-25 16:50:29,887 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:50:29,887 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:50:29,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:29,888 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:50:29,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1202, now seen corresponding path program 1 times [2022-11-25 16:50:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435462042] [2022-11-25 16:50:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:30,026 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 16:50:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435462042] [2022-11-25 16:50:30,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435462042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:30,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:30,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:50:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127636649] [2022-11-25 16:50:30,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:30,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:50:30,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:50:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:50:30,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 394 [2022-11-25 16:50:30,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 172 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 16:50:30,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:30,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 394 [2022-11-25 16:50:30,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:50:39,591 INFO L130 PetriNetUnfolder]: 36552/48404 cut-off events. [2022-11-25 16:50:39,592 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-25 16:50:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97030 conditions, 48404 events. 36552/48404 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 2119. Compared 270836 event pairs, 36552 based on Foata normal form. 0/28215 useless extension candidates. Maximal degree in co-relation 97018. Up to 48399 conditions per place. [2022-11-25 16:50:39,920 INFO L137 encePairwiseOnDemand]: 359/394 looper letters, 43 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-11-25 16:50:39,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 45 transitions, 188 flow [2022-11-25 16:50:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:50:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:50:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 382 transitions. [2022-11-25 16:50:39,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4847715736040609 [2022-11-25 16:50:39,942 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 382 transitions. [2022-11-25 16:50:39,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 382 transitions. [2022-11-25 16:50:39,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:50:39,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 382 transitions. [2022-11-25 16:50:39,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 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 16:50:39,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 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 16:50:39,963 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 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 16:50:39,965 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 172 flow. Second operand 2 states and 382 transitions. [2022-11-25 16:50:39,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 45 transitions, 188 flow [2022-11-25 16:50:39,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 16:50:39,978 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 98 flow [2022-11-25 16:50:39,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-11-25 16:50:39,984 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -37 predicate places. [2022-11-25 16:50:39,985 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 98 flow [2022-11-25 16:50:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 16:50:39,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:39,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 16:50:39,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:50:39,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1185588, now seen corresponding path program 1 times [2022-11-25 16:50:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786422528] [2022-11-25 16:50:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:50:40,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786422528] [2022-11-25 16:50:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786422528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:40,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:40,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:50:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019879955] [2022-11-25 16:50:40,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:50:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:50:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:50:40,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 394 [2022-11-25 16:50:40,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 16:50:40,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:40,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 394 [2022-11-25 16:50:40,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:50:45,035 INFO L130 PetriNetUnfolder]: 19312/25842 cut-off events. [2022-11-25 16:50:45,035 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:50:45,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51836 conditions, 25842 events. 19312/25842 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 135611 event pairs, 10552 based on Foata normal form. 0/17334 useless extension candidates. Maximal degree in co-relation 51833. Up to 14611 conditions per place. [2022-11-25 16:50:45,169 INFO L137 encePairwiseOnDemand]: 385/394 looper letters, 52 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-11-25 16:50:45,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 228 flow [2022-11-25 16:50:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:50:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:50:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-11-25 16:50:45,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42470389170896783 [2022-11-25 16:50:45,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-11-25 16:50:45,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-11-25 16:50:45,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:50:45,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-11-25 16:50:45,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 16:50:45,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:45,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:45,182 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 98 flow. Second operand 3 states and 502 transitions. [2022-11-25 16:50:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 228 flow [2022-11-25 16:50:45,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:50:45,184 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 110 flow [2022-11-25 16:50:45,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2022-11-25 16:50:45,185 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -36 predicate places. [2022-11-25 16:50:45,186 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 110 flow [2022-11-25 16:50:45,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 16:50:45,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:45,187 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 16:50:45,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:50:45,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1185589, now seen corresponding path program 1 times [2022-11-25 16:50:45,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:45,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847481868] [2022-11-25 16:50:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:45,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,408 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 16:50:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847481868] [2022-11-25 16:50:45,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847481868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:45,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:45,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:50:45,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845051498] [2022-11-25 16:50:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:50:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:50:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:50:45,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 394 [2022-11-25 16:50:45,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 16:50:45,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:45,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 394 [2022-11-25 16:50:45,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:50:47,812 INFO L130 PetriNetUnfolder]: 9157/12411 cut-off events. [2022-11-25 16:50:47,812 INFO L131 PetriNetUnfolder]: For 1083/1083 co-relation queries the response was YES. [2022-11-25 16:50:47,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27055 conditions, 12411 events. 9157/12411 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 61127 event pairs, 9157 based on Foata normal form. 0/11258 useless extension candidates. Maximal degree in co-relation 27050. Up to 12407 conditions per place. [2022-11-25 16:50:47,893 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 16:50:47,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 38 transitions, 172 flow [2022-11-25 16:50:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:50:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:50:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-11-25 16:50:47,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41539763113367173 [2022-11-25 16:50:47,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-11-25 16:50:47,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-11-25 16:50:47,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:50:47,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-11-25 16:50:47,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 16:50:47,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:47,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:47,903 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 110 flow. Second operand 3 states and 491 transitions. [2022-11-25 16:50:47,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 38 transitions, 172 flow [2022-11-25 16:50:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:50:47,913 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 98 flow [2022-11-25 16:50:47,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-11-25 16:50:47,915 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -41 predicate places. [2022-11-25 16:50:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 98 flow [2022-11-25 16:50:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 16:50:47,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:47,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:47,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:50:47,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2134248444, now seen corresponding path program 1 times [2022-11-25 16:50:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:47,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891169834] [2022-11-25 16:50:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:48,194 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 16:50:48,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891169834] [2022-11-25 16:50:48,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891169834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:48,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:48,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:50:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830976081] [2022-11-25 16:50:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:50:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:50:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:50:48,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 394 [2022-11-25 16:50:48,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 16:50:48,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:48,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 394 [2022-11-25 16:50:48,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:50:50,547 INFO L130 PetriNetUnfolder]: 8853/12820 cut-off events. [2022-11-25 16:50:50,548 INFO L131 PetriNetUnfolder]: For 1215/1215 co-relation queries the response was YES. [2022-11-25 16:50:50,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26920 conditions, 12820 events. 8853/12820 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 73767 event pairs, 3429 based on Foata normal form. 0/11764 useless extension candidates. Maximal degree in co-relation 26915. Up to 7337 conditions per place. [2022-11-25 16:50:50,624 INFO L137 encePairwiseOnDemand]: 390/394 looper letters, 63 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-25 16:50:50,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 301 flow [2022-11-25 16:50:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:50:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:50:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2022-11-25 16:50:50,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43993231810490696 [2022-11-25 16:50:50,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2022-11-25 16:50:50,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2022-11-25 16:50:50,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:50:50,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2022-11-25 16:50:50,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 16:50:50,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:50,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 16:50:50,635 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 98 flow. Second operand 3 states and 520 transitions. [2022-11-25 16:50:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 301 flow [2022-11-25 16:50:50,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:50:50,638 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 107 flow [2022-11-25 16:50:50,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2022-11-25 16:50:50,639 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -39 predicate places. [2022-11-25 16:50:50,639 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 107 flow [2022-11-25 16:50:50,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 16:50:50,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:50,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:50:50,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1737194497, now seen corresponding path program 1 times [2022-11-25 16:50:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186338324] [2022-11-25 16:50:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:50,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:51,569 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 16:50:51,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186338324] [2022-11-25 16:50:51,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186338324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:51,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:51,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:50:51,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905402870] [2022-11-25 16:50:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:50:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:50:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:50:51,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 394 [2022-11-25 16:50:51,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 16:50:51,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:51,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 394 [2022-11-25 16:50:51,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:50:54,668 INFO L130 PetriNetUnfolder]: 13304/18991 cut-off events. [2022-11-25 16:50:54,669 INFO L131 PetriNetUnfolder]: For 2500/2500 co-relation queries the response was YES. [2022-11-25 16:50:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41994 conditions, 18991 events. 13304/18991 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 113821 event pairs, 7183 based on Foata normal form. 0/17575 useless extension candidates. Maximal degree in co-relation 41988. Up to 11224 conditions per place. [2022-11-25 16:50:54,779 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 62 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-11-25 16:50:54,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 320 flow [2022-11-25 16:50:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:50:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:50:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2022-11-25 16:50:54,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4086294416243655 [2022-11-25 16:50:54,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2022-11-25 16:50:54,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2022-11-25 16:50:54,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:50:54,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2022-11-25 16:50:54,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 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 16:50:54,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 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 16:50:54,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 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 16:50:54,791 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 107 flow. Second operand 4 states and 644 transitions. [2022-11-25 16:50:54,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 320 flow [2022-11-25 16:50:54,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:50:54,799 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 131 flow [2022-11-25 16:50:54,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2022-11-25 16:50:54,800 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -37 predicate places. [2022-11-25 16:50:54,800 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 131 flow [2022-11-25 16:50:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 16:50:54,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:54,801 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:54,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:50:54,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2022-11-25 16:50:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1737194496, now seen corresponding path program 1 times [2022-11-25 16:50:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:54,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392344097] [2022-11-25 16:50:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:55,630 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 16:50:55,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:55,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392344097] [2022-11-25 16:50:55,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392344097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:55,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:55,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:50:55,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875317146] [2022-11-25 16:50:55,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:50:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:50:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:50:55,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 394 [2022-11-25 16:50:55,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 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 16:50:55,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:50:55,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 394 [2022-11-25 16:50:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand