./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races 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_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/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_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1941de74eb261e3f3ecbbb76e1746df74b536a1b8190d4ca9fd6a4341892fdcb --- 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 18:16:47,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:16:47,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:16:47,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:16:47,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:16:47,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:16:47,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:16:47,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:16:47,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:16:47,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:16:47,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:16:47,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:16:47,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:16:47,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:16:47,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:16:47,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:16:47,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:16:47,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:16:47,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:16:47,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:16:47,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:16:47,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:16:47,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:16:47,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:16:47,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:16:47,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:16:47,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:16:47,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:16:47,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:16:47,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:16:47,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:16:47,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:16:47,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:16:47,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:16:47,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:16:47,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:16:47,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:16:47,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:16:47,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:16:47,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:16:47,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:16:47,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-11-25 18:16:47,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:16:47,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:16:47,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:16:47,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:16:47,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:16:47,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:16:47,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:16:47,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:16:47,258 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:16:47,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:16:47,258 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:16:47,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:16:47,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:16:47,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:16:47,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:16:47,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:16:47,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:16:47,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:16:47,261 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-25 18:16:47,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:16:47,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:16:47,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:16:47,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:16:47,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:16:47,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:16:47,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:16:47,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:47,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:16:47,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:16:47,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:16:47,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:16:47,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:16:47,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:16:47,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:16:47,265 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:16:47,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:16:47,266 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_05cd927f-896f-413e-9a47-b3fe4791ec93/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1941de74eb261e3f3ecbbb76e1746df74b536a1b8190d4ca9fd6a4341892fdcb [2022-11-25 18:16:47,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:16:47,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:16:47,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:16:47,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:16:47,635 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:16:47,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i [2022-11-25 18:16:50,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:16:51,543 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:16:51,544 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i [2022-11-25 18:16:51,593 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/data/eb478059f/a2d7c81fa1d64ae1bcc18b0f84726869/FLAGf4a3c0182 [2022-11-25 18:16:51,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/data/eb478059f/a2d7c81fa1d64ae1bcc18b0f84726869 [2022-11-25 18:16:51,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:16:51,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:16:51,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:51,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:16:51,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:16:51,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:51" (1/1) ... [2022-11-25 18:16:51,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad05d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:51, skipping insertion in model container [2022-11-25 18:16:51,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:51" (1/1) ... [2022-11-25 18:16:51,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:16:51,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:16:52,262 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_05cd927f-896f-413e-9a47-b3fe4791ec93/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i[5469,5482] [2022-11-25 18:16:52,695 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,701 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,712 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,833 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,874 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:52,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:52,890 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:53,349 WARN L623 FunctionHandler]: Unknown extern function cpu_relax [2022-11-25 18:16:53,354 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:53,358 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:53,367 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:53,473 WARN L623 FunctionHandler]: Unknown extern function set_normalized_timespec [2022-11-25 18:16:53,478 WARN L623 FunctionHandler]: Unknown extern function set_normalized_timespec [2022-11-25 18:16:53,609 WARN L623 FunctionHandler]: Unknown extern function __iter_div_u64_rem [2022-11-25 18:16:53,816 WARN L623 FunctionHandler]: Unknown extern function atomic_add_unless [2022-11-25 18:16:53,823 WARN L623 FunctionHandler]: Unknown extern function atomic_add_unless [2022-11-25 18:16:53,891 WARN L623 FunctionHandler]: Unknown extern function kobject_get [2022-11-25 18:16:53,895 WARN L623 FunctionHandler]: Unknown extern function kobject_put [2022-11-25 18:16:54,218 WARN L623 FunctionHandler]: Unknown extern function bit_spin_lock [2022-11-25 18:16:54,222 WARN L623 FunctionHandler]: Unknown extern function __bit_spin_unlock [2022-11-25 18:16:54,226 WARN L623 FunctionHandler]: Unknown extern function bit_spin_is_locked [2022-11-25 18:16:54,321 WARN L623 FunctionHandler]: Unknown extern function d_instantiate [2022-11-25 18:16:54,322 WARN L623 FunctionHandler]: Unknown extern function d_rehash [2022-11-25 18:16:54,324 WARN L623 FunctionHandler]: Unknown extern function d_instantiate_unique [2022-11-25 18:16:54,325 WARN L623 FunctionHandler]: Unknown extern function d_rehash [2022-11-25 18:16:54,481 WARN L623 FunctionHandler]: Unknown extern function timespec_trunc [2022-11-25 18:16:54,513 WARN L623 FunctionHandler]: Unknown extern function __tty_alloc_driver [2022-11-25 18:16:54,690 WARN L623 FunctionHandler]: Unknown extern function llist_add_batch [2022-11-25 18:16:54,695 WARN L623 FunctionHandler]: Unknown extern function __xchg_wrong_size [2022-11-25 18:16:54,902 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-11-25 18:16:55,125 WARN L623 FunctionHandler]: Unknown extern function tty_unlock [2022-11-25 18:16:55,125 WARN L623 FunctionHandler]: Unknown extern function tty_wait_until_sent [2022-11-25 18:16:55,125 WARN L623 FunctionHandler]: Unknown extern function tty_lock [2022-11-25 18:16:56,276 WARN L611 FunctionHandler]: implicit declaration of function __builtin_constant_p [2022-11-25 18:16:56,277 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:56,294 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:56,303 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:56,310 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:57,105 WARN L623 FunctionHandler]: Unknown extern function nvram_read_byte [2022-11-25 18:16:57,112 WARN L623 FunctionHandler]: Unknown extern function nvram_write_byte [2022-11-25 18:16:57,118 WARN L623 FunctionHandler]: Unknown extern function nvram_sync [2022-11-25 18:16:57,130 WARN L623 FunctionHandler]: Unknown extern function misc_register [2022-11-25 18:16:57,130 WARN L623 FunctionHandler]: Unknown extern function nvram_get_size [2022-11-25 18:16:57,135 WARN L623 FunctionHandler]: Unknown extern function misc_deregister [2022-11-25 18:16:57,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:57,234 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:16:57,266 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_05cd927f-896f-413e-9a47-b3fe4791ec93/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i[5469,5482] [2022-11-25 18:16:57,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,340 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,340 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:16:57,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:16:57,364 WARN L623 FunctionHandler]: Unknown extern function cpu_relax [2022-11-25 18:16:57,365 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:57,366 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:57,367 WARN L623 FunctionHandler]: Unknown extern function smp_rmb [2022-11-25 18:16:57,383 WARN L623 FunctionHandler]: Unknown extern function set_normalized_timespec [2022-11-25 18:16:57,386 WARN L623 FunctionHandler]: Unknown extern function set_normalized_timespec [2022-11-25 18:16:57,396 WARN L623 FunctionHandler]: Unknown extern function __iter_div_u64_rem [2022-11-25 18:16:57,427 WARN L623 FunctionHandler]: Unknown extern function atomic_add_unless [2022-11-25 18:16:57,433 WARN L623 FunctionHandler]: Unknown extern function atomic_add_unless [2022-11-25 18:16:57,437 WARN L623 FunctionHandler]: Unknown extern function kobject_get [2022-11-25 18:16:57,438 WARN L623 FunctionHandler]: Unknown extern function kobject_put [2022-11-25 18:16:57,453 WARN L623 FunctionHandler]: Unknown extern function bit_spin_lock [2022-11-25 18:16:57,454 WARN L623 FunctionHandler]: Unknown extern function __bit_spin_unlock [2022-11-25 18:16:57,454 WARN L623 FunctionHandler]: Unknown extern function bit_spin_is_locked [2022-11-25 18:16:57,463 WARN L623 FunctionHandler]: Unknown extern function d_instantiate [2022-11-25 18:16:57,463 WARN L623 FunctionHandler]: Unknown extern function d_rehash [2022-11-25 18:16:57,464 WARN L623 FunctionHandler]: Unknown extern function d_instantiate_unique [2022-11-25 18:16:57,464 WARN L623 FunctionHandler]: Unknown extern function d_rehash [2022-11-25 18:16:57,479 WARN L623 FunctionHandler]: Unknown extern function timespec_trunc [2022-11-25 18:16:57,484 WARN L623 FunctionHandler]: Unknown extern function __tty_alloc_driver [2022-11-25 18:16:57,494 WARN L623 FunctionHandler]: Unknown extern function llist_add_batch [2022-11-25 18:16:57,496 WARN L623 FunctionHandler]: Unknown extern function __xchg_wrong_size [2022-11-25 18:16:57,502 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-11-25 18:16:57,512 WARN L623 FunctionHandler]: Unknown extern function tty_unlock [2022-11-25 18:16:57,512 WARN L623 FunctionHandler]: Unknown extern function tty_wait_until_sent [2022-11-25 18:16:57,513 WARN L623 FunctionHandler]: Unknown extern function tty_lock [2022-11-25 18:16:57,686 WARN L611 FunctionHandler]: implicit declaration of function __builtin_constant_p [2022-11-25 18:16:57,687 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:57,691 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:57,697 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:57,739 WARN L623 FunctionHandler]: Unknown extern function ____ilog2_NaN [2022-11-25 18:16:57,803 WARN L623 FunctionHandler]: Unknown extern function nvram_read_byte [2022-11-25 18:16:57,806 WARN L623 FunctionHandler]: Unknown extern function nvram_write_byte [2022-11-25 18:16:57,807 WARN L623 FunctionHandler]: Unknown extern function nvram_sync [2022-11-25 18:16:57,810 WARN L623 FunctionHandler]: Unknown extern function misc_register [2022-11-25 18:16:57,811 WARN L623 FunctionHandler]: Unknown extern function nvram_get_size [2022-11-25 18:16:57,811 WARN L623 FunctionHandler]: Unknown extern function misc_deregister [2022-11-25 18:16:57,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:58,496 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:16:58,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58 WrapperNode [2022-11-25 18:16:58,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:58,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:58,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:16:58,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:16:58,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,729 INFO L138 Inliner]: procedures = 1354, calls = 1452, calls flagged for inlining = 347, calls inlined = 19, statements flattened = 492 [2022-11-25 18:16:58,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:58,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:16:58,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:16:58,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:16:58,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:16:58,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:16:58,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:16:58,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:16:58,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (1/1) ... [2022-11-25 18:16:58,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:58,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:16:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cd927f-896f-413e-9a47-b3fe4791ec93/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:16:58,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:16:58,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:16:58,916 INFO L130 BoogieDeclarations]: Found specification of procedure whoop_wrapper_nvram_unlocked_ioctl [2022-11-25 18:16:58,917 INFO L138 BoogieDeclarations]: Found implementation of procedure whoop_wrapper_nvram_unlocked_ioctl [2022-11-25 18:16:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:16:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:16:58,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:16:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-25 18:16:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:16:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:16:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:16:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:16:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:16:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:16:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure whoop_wrapper_write_nvram [2022-11-25 18:16:58,926 INFO L138 BoogieDeclarations]: Found implementation of procedure whoop_wrapper_write_nvram [2022-11-25 18:16:58,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:16:58,931 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 18:16:59,595 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:16:59,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:17:00,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:17:00,756 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:17:00,756 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:17:00,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:00 BoogieIcfgContainer [2022-11-25 18:17:00,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:17:00,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:17:00,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:17:00,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:17:00,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:16:51" (1/3) ... [2022-11-25 18:17:00,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef604d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:00, skipping insertion in model container [2022-11-25 18:17:00,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:58" (2/3) ... [2022-11-25 18:17:00,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef604d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:00, skipping insertion in model container [2022-11-25 18:17:00,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:00" (3/3) ... [2022-11-25 18:17:00,776 INFO L112 eAbstractionObserver]: Analyzing ICFG char_generic_nvram_nvram_unlocked_ioctl_write_nvram.i [2022-11-25 18:17:00,786 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:17:00,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:17:00,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-11-25 18:17:00,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:17:00,992 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:17:01,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 558 places, 563 transitions, 1142 flow [2022-11-25 18:17:01,422 INFO L130 PetriNetUnfolder]: 12/561 cut-off events. [2022-11-25 18:17:01,422 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:17:01,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 561 events. 12/561 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 623 event pairs, 0 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 472. Up to 4 conditions per place. [2022-11-25 18:17:01,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 558 places, 563 transitions, 1142 flow [2022-11-25 18:17:01,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 547 places, 552 transitions, 1113 flow [2022-11-25 18:17:01,465 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:01,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 547 places, 552 transitions, 1113 flow [2022-11-25 18:17:01,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 547 places, 552 transitions, 1113 flow [2022-11-25 18:17:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 547 places, 552 transitions, 1113 flow [2022-11-25 18:17:01,735 INFO L130 PetriNetUnfolder]: 12/552 cut-off events. [2022-11-25 18:17:01,735 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:17:01,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 552 events. 12/552 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 550 event pairs, 0 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 472. Up to 4 conditions per place. [2022-11-25 18:17:01,757 INFO L119 LiptonReduction]: Number of co-enabled transitions 27384 [2022-11-25 18:25:13,149 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 359 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:25:20,464 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification that was a NOOP. DAG size: 335 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:25:29,843 WARN L233 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 359 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:25:37,820 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 335 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:31:21,594 WARN L233 SmtUtils]: Spent 5.44m on a formula simplification. DAG size of input: 582 DAG size of output: 578 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)