./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.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_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/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_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/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_59de7f61-fa0a-4c6c-99f6-a24470b85391/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 9047d35108a9c07c04b519cba211a741bb80887623b2a85c45105c17ca835121 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:28:03,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:28:03,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:28:03,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:28:03,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:28:03,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:28:03,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:28:03,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:28:03,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:28:03,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:28:03,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:28:03,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:28:03,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:28:03,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:28:03,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:28:03,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:28:03,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:28:03,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:28:03,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:28:03,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:28:03,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:28:03,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:28:03,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:28:03,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:28:03,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:28:03,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:28:03,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:28:03,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:28:03,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:28:03,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:28:03,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:28:03,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:28:03,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:28:03,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:28:03,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:28:03,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:28:03,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:28:03,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:28:03,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:28:03,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:28:03,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:28:03,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:28:03,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:28:03,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:28:03,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:28:03,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:28:03,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:28:03,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:28:03,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:28:03,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:28:03,651 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:28:03,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:28:03,653 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:28:03,653 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:28:03,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:28:03,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:28:03,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:28:03,654 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:28:03,654 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:28:03,654 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:28:03,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:28:03,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:28:03,655 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:28:03,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:28:03,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:28:03,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:28:03,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:28:03,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:03,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:28:03,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:28:03,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:28:03,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:28:03,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:28:03,658 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:28:03,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:28:03,658 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_59de7f61-fa0a-4c6c-99f6-a24470b85391/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9047d35108a9c07c04b519cba211a741bb80887623b2a85c45105c17ca835121 [2022-11-25 17:28:04,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:28:04,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:28:04,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:28:04,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:28:04,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:28:04,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i [2022-11-25 17:28:07,102 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:28:07,454 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:28:07,455 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i [2022-11-25 17:28:07,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/data/1fa9ed27d/c265eaee24db4babb429d5b959bb7871/FLAG4722294f2 [2022-11-25 17:28:07,492 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/data/1fa9ed27d/c265eaee24db4babb429d5b959bb7871 [2022-11-25 17:28:07,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:28:07,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:28:07,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:07,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:28:07,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:28:07,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:07" (1/1) ... [2022-11-25 17:28:07,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ba947a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:07, skipping insertion in model container [2022-11-25 17:28:07,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:07" (1/1) ... [2022-11-25 17:28:07,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:28:07,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:28:07,766 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_59de7f61-fa0a-4c6c-99f6-a24470b85391/sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i[949,962] [2022-11-25 17:28:08,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,064 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,091 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:08,112 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:28:08,133 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_59de7f61-fa0a-4c6c-99f6-a24470b85391/sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i[949,962] [2022-11-25 17:28:08,169 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,201 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,201 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,210 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:08,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:08,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:08,271 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:28:08,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08 WrapperNode [2022-11-25 17:28:08,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:08,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:08,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:28:08,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:28:08,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,366 INFO L138 Inliner]: procedures = 176, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 135 [2022-11-25 17:28:08,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:08,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:28:08,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:28:08,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:28:08,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:28:08,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:28:08,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:28:08,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:28:08,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (1/1) ... [2022-11-25 17:28:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:08,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:08,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:28:08,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de7f61-fa0a-4c6c-99f6-a24470b85391/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:28:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:28:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-25 17:28:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-25 17:28:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-25 17:28:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-25 17:28:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-25 17:28:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-25 17:28:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:28:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:28:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:28:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:28:08,539 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:28:08,759 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:28:08,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:28:09,261 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:28:09,734 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:28:09,734 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 17:28:09,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:09 BoogieIcfgContainer [2022-11-25 17:28:09,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:28:09,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:28:09,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:28:09,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:28:09,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:28:07" (1/3) ... [2022-11-25 17:28:09,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a72a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:09, skipping insertion in model container [2022-11-25 17:28:09,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:08" (2/3) ... [2022-11-25 17:28:09,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a72a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:09, skipping insertion in model container [2022-11-25 17:28:09,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:09" (3/3) ... [2022-11-25 17:28:09,751 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2022-11-25 17:28:09,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:28:09,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2022-11-25 17:28:09,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:28:09,908 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:28:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 173 transitions, 361 flow [2022-11-25 17:28:10,090 INFO L130 PetriNetUnfolder]: 2/170 cut-off events. [2022-11-25 17:28:10,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:10,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 170 events. 2/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 212 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-25 17:28:10,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 173 transitions, 361 flow [2022-11-25 17:28:10,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 170 transitions, 349 flow [2022-11-25 17:28:10,113 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:10,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 170 transitions, 349 flow [2022-11-25 17:28:10,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 170 transitions, 349 flow [2022-11-25 17:28:10,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 170 transitions, 349 flow [2022-11-25 17:28:10,213 INFO L130 PetriNetUnfolder]: 2/170 cut-off events. [2022-11-25 17:28:10,213 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:10,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 170 events. 2/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 217 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-25 17:28:10,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 6064 [2022-11-25 17:28:26,241 INFO L134 LiptonReduction]: Checked pairs total: 28117 [2022-11-25 17:28:26,241 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-11-25 17:28:26,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:26,280 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;@3d9d2f5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:26,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-11-25 17:28:26,285 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:28:26,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:26,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:26,288 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:28:26,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash 952, now seen corresponding path program 1 times [2022-11-25 17:28:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:26,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582824597] [2022-11-25 17:28:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582824597] [2022-11-25 17:28:26,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582824597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:26,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:26,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:28:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848228539] [2022-11-25 17:28:26,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:28:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:28:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:28:26,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 327 [2022-11-25 17:28:26,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 141 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:26,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:26,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 327 [2022-11-25 17:28:26,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:33,800 INFO L130 PetriNetUnfolder]: 25241/35116 cut-off events. [2022-11-25 17:28:33,800 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:28:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70397 conditions, 35116 events. 25241/35116 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2694. Compared 243121 event pairs, 25241 based on Foata normal form. 0/14353 useless extension candidates. Maximal degree in co-relation 70386. Up to 35099 conditions per place. [2022-11-25 17:28:34,100 INFO L137 encePairwiseOnDemand]: 310/327 looper letters, 44 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2022-11-25 17:28:34,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 195 flow [2022-11-25 17:28:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:28:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:28:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 323 transitions. [2022-11-25 17:28:34,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4938837920489297 [2022-11-25 17:28:34,124 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 323 transitions. [2022-11-25 17:28:34,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 323 transitions. [2022-11-25 17:28:34,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:34,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 323 transitions. [2022-11-25 17:28:34,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 161.5) internal successors, (323), 2 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,148 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,150 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 141 flow. Second operand 2 states and 323 transitions. [2022-11-25 17:28:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 195 flow [2022-11-25 17:28:34,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:28:34,165 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 104 flow [2022-11-25 17:28:34,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 17:28:34,171 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -18 predicate places. [2022-11-25 17:28:34,172 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 104 flow [2022-11-25 17:28:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:34,172 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:28:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:28:34,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 29093974, now seen corresponding path program 1 times [2022-11-25 17:28:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:34,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045581738] [2022-11-25 17:28:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045581738] [2022-11-25 17:28:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045581738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:34,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:34,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732351912] [2022-11-25 17:28:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:34,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2022-11-25 17:28:34,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:34,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:34,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2022-11-25 17:28:34,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:38,593 INFO L130 PetriNetUnfolder]: 19076/27934 cut-off events. [2022-11-25 17:28:38,594 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:38,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55735 conditions, 27934 events. 19076/27934 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 193789 event pairs, 11626 based on Foata normal form. 0/14925 useless extension candidates. Maximal degree in co-relation 55732. Up to 16160 conditions per place. [2022-11-25 17:28:38,766 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 54 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2022-11-25 17:28:38,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 268 flow [2022-11-25 17:28:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2022-11-25 17:28:38,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45769622833843016 [2022-11-25 17:28:38,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2022-11-25 17:28:38,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2022-11-25 17:28:38,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:38,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2022-11-25 17:28:38,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:38,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:38,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:38,780 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 104 flow. Second operand 3 states and 449 transitions. [2022-11-25 17:28:38,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 268 flow [2022-11-25 17:28:38,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:28:38,784 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 188 flow [2022-11-25 17:28:38,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2022-11-25 17:28:38,785 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -16 predicate places. [2022-11-25 17:28:38,785 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 188 flow [2022-11-25 17:28:38,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:38,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:38,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:28:38,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:28:38,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 29093975, now seen corresponding path program 1 times [2022-11-25 17:28:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:38,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371282606] [2022-11-25 17:28:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:38,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371282606] [2022-11-25 17:28:38,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371282606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:38,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:38,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277387760] [2022-11-25 17:28:38,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:39,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 327 [2022-11-25 17:28:39,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 188 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 17:28:39,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:39,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 327 [2022-11-25 17:28:39,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:40,720 INFO L130 PetriNetUnfolder]: 5754/8824 cut-off events. [2022-11-25 17:28:40,721 INFO L131 PetriNetUnfolder]: For 2868/3026 co-relation queries the response was YES. [2022-11-25 17:28:40,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24890 conditions, 8824 events. 5754/8824 cut-off events. For 2868/3026 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 56663 event pairs, 4225 based on Foata normal form. 1909/9167 useless extension candidates. Maximal degree in co-relation 24885. Up to 8325 conditions per place. [2022-11-25 17:28:40,770 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 39 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:28:40,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 248 flow [2022-11-25 17:28:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2022-11-25 17:28:40,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4383282364933741 [2022-11-25 17:28:40,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2022-11-25 17:28:40,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2022-11-25 17:28:40,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:40,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2022-11-25 17:28:40,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,779 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 188 flow. Second operand 3 states and 430 transitions. [2022-11-25 17:28:40,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 248 flow [2022-11-25 17:28:40,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:40,805 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 150 flow [2022-11-25 17:28:40,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-11-25 17:28:40,806 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -26 predicate places. [2022-11-25 17:28:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 150 flow [2022-11-25 17:28:40,807 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 17:28:40,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:40,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:28:40,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 885909828, now seen corresponding path program 1 times [2022-11-25 17:28:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391248072] [2022-11-25 17:28:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:40,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:40,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391248072] [2022-11-25 17:28:40,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391248072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:40,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:40,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138828397] [2022-11-25 17:28:40,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:40,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:40,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2022-11-25 17:28:40,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:40,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:40,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2022-11-25 17:28:40,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:42,050 INFO L130 PetriNetUnfolder]: 5510/8705 cut-off events. [2022-11-25 17:28:42,050 INFO L131 PetriNetUnfolder]: For 1157/1229 co-relation queries the response was YES. [2022-11-25 17:28:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22385 conditions, 8705 events. 5510/8705 cut-off events. For 1157/1229 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 58557 event pairs, 2063 based on Foata normal form. 0/6307 useless extension candidates. Maximal degree in co-relation 22380. Up to 6305 conditions per place. [2022-11-25 17:28:42,096 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 63 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2022-11-25 17:28:42,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 366 flow [2022-11-25 17:28:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-11-25 17:28:42,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.454638124362895 [2022-11-25 17:28:42,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-11-25 17:28:42,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-11-25 17:28:42,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:42,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-11-25 17:28:42,102 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 17:28:42,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:42,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:42,105 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 150 flow. Second operand 3 states and 446 transitions. [2022-11-25 17:28:42,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 366 flow [2022-11-25 17:28:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:42,109 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 162 flow [2022-11-25 17:28:42,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-11-25 17:28:42,111 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -24 predicate places. [2022-11-25 17:28:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 162 flow [2022-11-25 17:28:42,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:42,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:42,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:28:42,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1693402070, now seen corresponding path program 1 times [2022-11-25 17:28:42,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:42,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178716791] [2022-11-25 17:28:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:42,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:42,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178716791] [2022-11-25 17:28:42,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178716791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:42,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:42,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:28:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562591058] [2022-11-25 17:28:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:28:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:28:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:28:42,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 327 [2022-11-25 17:28:42,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:42,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:42,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 327 [2022-11-25 17:28:42,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:43,889 INFO L130 PetriNetUnfolder]: 6051/9668 cut-off events. [2022-11-25 17:28:43,889 INFO L131 PetriNetUnfolder]: For 2004/2087 co-relation queries the response was YES. [2022-11-25 17:28:43,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25973 conditions, 9668 events. 6051/9668 cut-off events. For 2004/2087 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 67218 event pairs, 2740 based on Foata normal form. 0/7601 useless extension candidates. Maximal degree in co-relation 25967. Up to 6751 conditions per place. [2022-11-25 17:28:43,959 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 52 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2022-11-25 17:28:43,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 330 flow [2022-11-25 17:28:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:28:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:28:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2022-11-25 17:28:43,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4197247706422018 [2022-11-25 17:28:43,977 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2022-11-25 17:28:43,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2022-11-25 17:28:43,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:43,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2022-11-25 17:28:43,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:43,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:43,984 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:43,984 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 162 flow. Second operand 4 states and 549 transitions. [2022-11-25 17:28:43,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 330 flow [2022-11-25 17:28:43,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:43,988 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 196 flow [2022-11-25 17:28:43,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2022-11-25 17:28:43,989 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -23 predicate places. [2022-11-25 17:28:43,989 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 196 flow [2022-11-25 17:28:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:43,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:43,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:28:43,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1693402071, now seen corresponding path program 1 times [2022-11-25 17:28:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692842585] [2022-11-25 17:28:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:44,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:44,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692842585] [2022-11-25 17:28:44,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692842585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:44,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:44,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:28:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737544873] [2022-11-25 17:28:44,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:44,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:28:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:28:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:28:44,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 327 [2022-11-25 17:28:44,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:44,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:44,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 327 [2022-11-25 17:28:44,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:46,640 INFO L130 PetriNetUnfolder]: 9954/15668 cut-off events. [2022-11-25 17:28:46,640 INFO L131 PetriNetUnfolder]: For 5198/5198 co-relation queries the response was YES. [2022-11-25 17:28:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44111 conditions, 15668 events. 9954/15668 cut-off events. For 5198/5198 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 113279 event pairs, 4405 based on Foata normal form. 60/12339 useless extension candidates. Maximal degree in co-relation 44104. Up to 7613 conditions per place. [2022-11-25 17:28:46,730 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 74 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2022-11-25 17:28:46,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 471 flow [2022-11-25 17:28:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:28:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:28:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2022-11-25 17:28:46,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42507645259938837 [2022-11-25 17:28:46,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2022-11-25 17:28:46,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2022-11-25 17:28:46,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:46,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2022-11-25 17:28:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:46,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:46,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:46,740 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 196 flow. Second operand 4 states and 556 transitions. [2022-11-25 17:28:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 471 flow [2022-11-25 17:28:46,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 462 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:46,776 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 205 flow [2022-11-25 17:28:46,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2022-11-25 17:28:46,777 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -21 predicate places. [2022-11-25 17:28:46,777 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 205 flow [2022-11-25 17:28:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:46,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:46,778 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:28:46,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1693395829, now seen corresponding path program 1 times [2022-11-25 17:28:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140069425] [2022-11-25 17:28:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140069425] [2022-11-25 17:28:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140069425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:46,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:46,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587106922] [2022-11-25 17:28:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:46,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2022-11-25 17:28:46,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:46,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:46,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2022-11-25 17:28:46,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:48,884 INFO L130 PetriNetUnfolder]: 11894/18199 cut-off events. [2022-11-25 17:28:48,884 INFO L131 PetriNetUnfolder]: For 8255/8611 co-relation queries the response was YES. [2022-11-25 17:28:48,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50847 conditions, 18199 events. 11894/18199 cut-off events. For 8255/8611 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 127046 event pairs, 3638 based on Foata normal form. 44/13788 useless extension candidates. Maximal degree in co-relation 50839. Up to 16845 conditions per place. [2022-11-25 17:28:49,005 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 71 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2022-11-25 17:28:49,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 78 transitions, 484 flow [2022-11-25 17:28:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2022-11-25 17:28:49,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44648318042813456 [2022-11-25 17:28:49,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2022-11-25 17:28:49,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2022-11-25 17:28:49,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:49,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2022-11-25 17:28:49,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:49,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:49,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:49,019 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 205 flow. Second operand 3 states and 438 transitions. [2022-11-25 17:28:49,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 78 transitions, 484 flow [2022-11-25 17:28:49,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:49,078 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 219 flow [2022-11-25 17:28:49,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-11-25 17:28:49,080 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -20 predicate places. [2022-11-25 17:28:49,081 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 219 flow [2022-11-25 17:28:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:49,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:49,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:49,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:28:49,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash 577607601, now seen corresponding path program 2 times [2022-11-25 17:28:49,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119815688] [2022-11-25 17:28:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119815688] [2022-11-25 17:28:49,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119815688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:49,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:49,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773602383] [2022-11-25 17:28:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:49,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:49,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:49,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2022-11-25 17:28:49,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:49,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:49,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2022-11-25 17:28:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:52,377 INFO L130 PetriNetUnfolder]: 10787/16935 cut-off events. [2022-11-25 17:28:52,377 INFO L131 PetriNetUnfolder]: For 6915/7159 co-relation queries the response was YES. [2022-11-25 17:28:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49296 conditions, 16935 events. 10787/16935 cut-off events. For 6915/7159 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 121707 event pairs, 3662 based on Foata normal form. 66/13152 useless extension candidates. Maximal degree in co-relation 49287. Up to 10859 conditions per place. [2022-11-25 17:28:52,495 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 72 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2022-11-25 17:28:52,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 493 flow [2022-11-25 17:28:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:28:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:28:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2022-11-25 17:28:52,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4073394495412844 [2022-11-25 17:28:52,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2022-11-25 17:28:52,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2022-11-25 17:28:52,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:52,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2022-11-25 17:28:52,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:52,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:52,507 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:52,508 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 219 flow. Second operand 5 states and 666 transitions. [2022-11-25 17:28:52,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 493 flow [2022-11-25 17:28:52,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 485 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:52,551 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 221 flow [2022-11-25 17:28:52,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2022-11-25 17:28:52,552 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -19 predicate places. [2022-11-25 17:28:52,552 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 221 flow [2022-11-25 17:28:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:52,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:52,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:52,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:28:52,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash 952471718, now seen corresponding path program 1 times [2022-11-25 17:28:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:52,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150524179] [2022-11-25 17:28:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150524179] [2022-11-25 17:28:52,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150524179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:52,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:52,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130584711] [2022-11-25 17:28:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:52,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:52,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 327 [2022-11-25 17:28:52,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:52,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:52,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 327 [2022-11-25 17:28:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:55,117 INFO L130 PetriNetUnfolder]: 10698/16780 cut-off events. [2022-11-25 17:28:55,117 INFO L131 PetriNetUnfolder]: For 9278/9555 co-relation queries the response was YES. [2022-11-25 17:28:55,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49046 conditions, 16780 events. 10698/16780 cut-off events. For 9278/9555 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 120237 event pairs, 6761 based on Foata normal form. 33/12622 useless extension candidates. Maximal degree in co-relation 49038. Up to 14223 conditions per place. [2022-11-25 17:28:55,216 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 77 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-25 17:28:55,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 541 flow [2022-11-25 17:28:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2022-11-25 17:28:55,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4505606523955148 [2022-11-25 17:28:55,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2022-11-25 17:28:55,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2022-11-25 17:28:55,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:55,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2022-11-25 17:28:55,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:55,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:55,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:55,224 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 221 flow. Second operand 3 states and 442 transitions. [2022-11-25 17:28:55,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 541 flow [2022-11-25 17:28:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:28:55,262 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 219 flow [2022-11-25 17:28:55,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2022-11-25 17:28:55,263 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -19 predicate places. [2022-11-25 17:28:55,263 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 219 flow [2022-11-25 17:28:55,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:55,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:55,264 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:55,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:28:55,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1265460713, now seen corresponding path program 1 times [2022-11-25 17:28:55,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649689462] [2022-11-25 17:28:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649689462] [2022-11-25 17:28:55,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649689462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:55,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:55,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:28:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892742867] [2022-11-25 17:28:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:55,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:28:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:28:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:28:55,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2022-11-25 17:28:55,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 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 17:28:55,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:55,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2022-11-25 17:28:55,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:57,585 INFO L130 PetriNetUnfolder]: 10642/16745 cut-off events. [2022-11-25 17:28:57,586 INFO L131 PetriNetUnfolder]: For 7619/7855 co-relation queries the response was YES. [2022-11-25 17:28:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49925 conditions, 16745 events. 10642/16745 cut-off events. For 7619/7855 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 120733 event pairs, 5074 based on Foata normal form. 11/12588 useless extension candidates. Maximal degree in co-relation 49916. Up to 13995 conditions per place. [2022-11-25 17:28:57,683 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 64 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-11-25 17:28:57,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 440 flow [2022-11-25 17:28:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-11-25 17:28:57,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4413863404689093 [2022-11-25 17:28:57,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-11-25 17:28:57,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-11-25 17:28:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:57,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-11-25 17:28:57,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:57,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:57,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:57,689 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 219 flow. Second operand 3 states and 433 transitions. [2022-11-25 17:28:57,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 440 flow [2022-11-25 17:28:57,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:57,723 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 226 flow [2022-11-25 17:28:57,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2022-11-25 17:28:57,724 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -18 predicate places. [2022-11-25 17:28:57,724 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 226 flow [2022-11-25 17:28:57,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 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 17:28:57,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:57,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:57,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:28:57,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting P1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -439186997, now seen corresponding path program 1 times [2022-11-25 17:28:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:57,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216071672] [2022-11-25 17:28:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:57,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:57,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:57,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216071672] [2022-11-25 17:28:57,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216071672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:57,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:57,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:28:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401287802] [2022-11-25 17:28:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:28:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:28:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:57,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 327 [2022-11-25 17:28:57,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:57,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:57,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 327 [2022-11-25 17:28:57,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:59,655 INFO L130 PetriNetUnfolder]: 9208/14462 cut-off events. [2022-11-25 17:28:59,655 INFO L131 PetriNetUnfolder]: For 6889/6889 co-relation queries the response was YES. [2022-11-25 17:28:59,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43623 conditions, 14462 events. 9208/14462 cut-off events. For 6889/6889 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 99077 event pairs, 3954 based on Foata normal form. 20/11200 useless extension candidates. Maximal degree in co-relation 43613. Up to 6552 conditions per place. [2022-11-25 17:28:59,764 INFO L137 encePairwiseOnDemand]: 310/327 looper letters, 56 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2022-11-25 17:28:59,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 452 flow [2022-11-25 17:28:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:28:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:28:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2022-11-25 17:28:59,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4181957186544342 [2022-11-25 17:28:59,768 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2022-11-25 17:28:59,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2022-11-25 17:28:59,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:59,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2022-11-25 17:28:59,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,773 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 226 flow. Second operand 4 states and 547 transitions. [2022-11-25 17:28:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 452 flow [2022-11-25 17:28:59,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:28:59,795 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 314 flow [2022-11-25 17:28:59,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2022-11-25 17:28:59,796 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -15 predicate places. [2022-11-25 17:28:59,796 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 314 flow [2022-11-25 17:28:59,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:59,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:59,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:28:59,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:28:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash -105671046, now seen corresponding path program 1 times [2022-11-25 17:28:59,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:59,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454954999] [2022-11-25 17:28:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:59,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454954999] [2022-11-25 17:29:00,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454954999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:00,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:29:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831679472] [2022-11-25 17:29:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:29:00,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 327 [2022-11-25 17:29:00,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:00,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 327 [2022-11-25 17:29:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:03,086 INFO L130 PetriNetUnfolder]: 16871/26434 cut-off events. [2022-11-25 17:29:03,086 INFO L131 PetriNetUnfolder]: For 26307/26771 co-relation queries the response was YES. [2022-11-25 17:29:03,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91583 conditions, 26434 events. 16871/26434 cut-off events. For 26307/26771 co-relation queries the response was YES. Maximal size of possible extension queue 1782. Compared 204016 event pairs, 4152 based on Foata normal form. 194/22190 useless extension candidates. Maximal degree in co-relation 91572. Up to 12901 conditions per place. [2022-11-25 17:29:03,241 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 115 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2022-11-25 17:29:03,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 971 flow [2022-11-25 17:29:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:29:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:29:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 582 transitions. [2022-11-25 17:29:03,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44495412844036697 [2022-11-25 17:29:03,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 582 transitions. [2022-11-25 17:29:03,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 582 transitions. [2022-11-25 17:29:03,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:03,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 582 transitions. [2022-11-25 17:29:03,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,249 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,249 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 314 flow. Second operand 4 states and 582 transitions. [2022-11-25 17:29:03,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 971 flow [2022-11-25 17:29:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 961 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:03,398 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2022-11-25 17:29:03,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-11-25 17:29:03,399 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -12 predicate places. [2022-11-25 17:29:03,399 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2022-11-25 17:29:03,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:03,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:03,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:29:03,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:29:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1587376480, now seen corresponding path program 2 times [2022-11-25 17:29:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733990253] [2022-11-25 17:29:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:03,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733990253] [2022-11-25 17:29:03,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733990253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:03,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:03,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:29:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192642791] [2022-11-25 17:29:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:29:03,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2022-11-25 17:29:03,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 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 17:29:03,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:03,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2022-11-25 17:29:03,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:08,384 INFO L130 PetriNetUnfolder]: 26363/41305 cut-off events. [2022-11-25 17:29:08,384 INFO L131 PetriNetUnfolder]: For 35962/36596 co-relation queries the response was YES. [2022-11-25 17:29:08,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144691 conditions, 41305 events. 26363/41305 cut-off events. For 35962/36596 co-relation queries the response was YES. Maximal size of possible extension queue 3114. Compared 338951 event pairs, 9203 based on Foata normal form. 188/34101 useless extension candidates. Maximal degree in co-relation 144678. Up to 20778 conditions per place. [2022-11-25 17:29:08,643 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 83 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2022-11-25 17:29:08,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 694 flow [2022-11-25 17:29:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-25 17:29:08,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44954128440366975 [2022-11-25 17:29:08,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-25 17:29:08,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-25 17:29:08,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:08,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-25 17:29:08,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:08,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:08,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:08,651 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 3 states and 441 transitions. [2022-11-25 17:29:08,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 694 flow [2022-11-25 17:29:08,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 688 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:08,880 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 334 flow [2022-11-25 17:29:08,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2022-11-25 17:29:08,881 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -11 predicate places. [2022-11-25 17:29:08,881 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 334 flow [2022-11-25 17:29:08,882 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 17:29:08,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:08,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:29:08,882 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:29:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1488757575, now seen corresponding path program 1 times [2022-11-25 17:29:08,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921198827] [2022-11-25 17:29:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:10,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921198827] [2022-11-25 17:29:10,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921198827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:10,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:10,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:29:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249030519] [2022-11-25 17:29:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:10,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:29:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:29:10,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:29:10,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 327 [2022-11-25 17:29:10,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 334 flow. Second operand has 9 states, 9 states have (on average 114.55555555555556) internal successors, (1031), 9 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:10,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:10,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 327 [2022-11-25 17:29:10,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:15,473 INFO L130 PetriNetUnfolder]: 24047/37929 cut-off events. [2022-11-25 17:29:15,473 INFO L131 PetriNetUnfolder]: For 31341/31369 co-relation queries the response was YES. [2022-11-25 17:29:15,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135247 conditions, 37929 events. 24047/37929 cut-off events. For 31341/31369 co-relation queries the response was YES. Maximal size of possible extension queue 3050. Compared 312364 event pairs, 9125 based on Foata normal form. 31/31674 useless extension candidates. Maximal degree in co-relation 135233. Up to 29114 conditions per place. [2022-11-25 17:29:15,740 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 126 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2022-11-25 17:29:15,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 163 transitions, 1228 flow [2022-11-25 17:29:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:29:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:29:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1244 transitions. [2022-11-25 17:29:15,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3804281345565749 [2022-11-25 17:29:15,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1244 transitions. [2022-11-25 17:29:15,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1244 transitions. [2022-11-25 17:29:15,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:15,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1244 transitions. [2022-11-25 17:29:15,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.4) internal successors, (1244), 10 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:15,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:15,756 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:15,756 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 334 flow. Second operand 10 states and 1244 transitions. [2022-11-25 17:29:15,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 163 transitions, 1228 flow [2022-11-25 17:29:15,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 163 transitions, 1214 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:15,998 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 702 flow [2022-11-25 17:29:15,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=702, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2022-11-25 17:29:15,999 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2022-11-25 17:29:15,999 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 702 flow [2022-11-25 17:29:16,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.55555555555556) internal successors, (1031), 9 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:16,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:16,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:16,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:29:16,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:29:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1151855018, now seen corresponding path program 1 times [2022-11-25 17:29:16,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:16,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449939100] [2022-11-25 17:29:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:16,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449939100] [2022-11-25 17:29:16,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449939100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:16,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:16,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:29:16,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898859796] [2022-11-25 17:29:16,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:29:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:29:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:29:17,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 327 [2022-11-25 17:29:17,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 702 flow. Second operand has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:17,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:17,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 327 [2022-11-25 17:29:17,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:23,048 INFO L130 PetriNetUnfolder]: 19124/30875 cut-off events. [2022-11-25 17:29:23,049 INFO L131 PetriNetUnfolder]: For 44204/44387 co-relation queries the response was YES. [2022-11-25 17:29:23,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117572 conditions, 30875 events. 19124/30875 cut-off events. For 44204/44387 co-relation queries the response was YES. Maximal size of possible extension queue 2511. Compared 255662 event pairs, 7974 based on Foata normal form. 10/27078 useless extension candidates. Maximal degree in co-relation 117550. Up to 20384 conditions per place. [2022-11-25 17:29:23,277 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 130 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2022-11-25 17:29:23,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 177 transitions, 1465 flow [2022-11-25 17:29:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:29:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:29:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1129 transitions. [2022-11-25 17:29:23,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3836221542643561 [2022-11-25 17:29:23,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1129 transitions. [2022-11-25 17:29:23,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1129 transitions. [2022-11-25 17:29:23,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:23,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1129 transitions. [2022-11-25 17:29:23,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.44444444444444) internal successors, (1129), 9 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:23,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:23,290 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:23,290 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 702 flow. Second operand 9 states and 1129 transitions. [2022-11-25 17:29:23,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 177 transitions, 1465 flow [2022-11-25 17:29:24,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 177 transitions, 1455 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-25 17:29:24,418 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 909 flow [2022-11-25 17:29:24,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=909, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2022-11-25 17:29:24,419 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 16 predicate places. [2022-11-25 17:29:24,419 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 909 flow [2022-11-25 17:29:24,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:24,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:24,420 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:24,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:29:24,420 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting P1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:29:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -729893301, now seen corresponding path program 1 times [2022-11-25 17:29:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578449187] [2022-11-25 17:29:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:24,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578449187] [2022-11-25 17:29:24,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578449187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:24,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:24,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:29:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999795748] [2022-11-25 17:29:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:24,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:29:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:29:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:29:24,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 327 [2022-11-25 17:29:24,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 909 flow. Second operand has 9 states, 9 states have (on average 117.44444444444444) internal successors, (1057), 9 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:24,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:24,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 327 [2022-11-25 17:29:24,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand