./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 654ba073723c5bebcf706552b3cd58bc95cc07bc71a7e60391f80a16de89dbcb --- 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-dbf71c6-m [2022-10-17 10:55:59,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:55:59,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:55:59,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:55:59,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:55:59,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:55:59,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:55:59,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:55:59,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:55:59,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:55:59,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:55:59,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:55:59,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:55:59,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:55:59,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:55:59,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:55:59,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:55:59,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:55:59,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:55:59,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:55:59,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:55:59,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:55:59,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:55:59,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:55:59,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:55:59,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:55:59,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:55:59,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:55:59,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:55:59,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:55:59,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:55:59,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:55:59,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:55:59,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:55:59,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:55:59,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:55:59,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:55:59,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:55:59,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:55:59,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:55:59,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:55:59,476 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:55:59,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:55:59,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:55:59,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:55:59,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:55:59,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:55:59,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:55:59,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:55:59,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:55:59,521 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:55:59,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:55:59,522 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:55:59,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:55:59,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:55:59,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:55:59,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:55:59,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:55:59,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:55:59,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:55:59,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:55:59,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:55:59,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:55:59,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:55:59,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:55:59,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:55:59,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:55:59,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:55:59,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:55:59,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:55:59,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:55:59,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:55:59,528 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:55:59,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:55:59,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:55:59,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 654ba073723c5bebcf706552b3cd58bc95cc07bc71a7e60391f80a16de89dbcb [2022-10-17 10:55:59,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:55:59,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:55:59,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:55:59,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:55:59,870 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:55:59,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i [2022-10-17 10:55:59,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/data/a5ccdacf0/95ef123ba7ee4d5189dc2e13e5c46949/FLAG03807340b [2022-10-17 10:56:00,474 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:56:00,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i [2022-10-17 10:56:00,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/data/a5ccdacf0/95ef123ba7ee4d5189dc2e13e5c46949/FLAG03807340b [2022-10-17 10:56:00,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/data/a5ccdacf0/95ef123ba7ee4d5189dc2e13e5c46949 [2022-10-17 10:56:00,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:56:00,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:56:00,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:56:00,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:56:00,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:56:00,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:56:00" (1/1) ... [2022-10-17 10:56:00,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2cb356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:00, skipping insertion in model container [2022-10-17 10:56:00,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:56:00" (1/1) ... [2022-10-17 10:56:00,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:56:00,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:56:01,092 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:56:01,286 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[30448,30461] [2022-10-17 10:56:01,298 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[30811,30824] [2022-10-17 10:56:01,311 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31483,31496] [2022-10-17 10:56:01,313 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31534,31547] [2022-10-17 10:56:01,320 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31683,31696] [2022-10-17 10:56:01,322 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31760,31773] [2022-10-17 10:56:01,329 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31807,31820] [2022-10-17 10:56:01,331 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31916,31929] [2022-10-17 10:56:01,335 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32035,32048] [2022-10-17 10:56:01,338 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32083,32096] [2022-10-17 10:56:01,341 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32160,32173] [2022-10-17 10:56:01,344 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32286,32299] [2022-10-17 10:56:01,357 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32897,32910] [2022-10-17 10:56:01,358 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32974,32987] [2022-10-17 10:56:01,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:56:01,369 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:56:01,382 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:56:01,402 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[30448,30461] [2022-10-17 10:56:01,405 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[30811,30824] [2022-10-17 10:56:01,410 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31483,31496] [2022-10-17 10:56:01,411 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31534,31547] [2022-10-17 10:56:01,412 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31683,31696] [2022-10-17 10:56:01,413 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31760,31773] [2022-10-17 10:56:01,414 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31807,31820] [2022-10-17 10:56:01,415 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[31916,31929] [2022-10-17 10:56:01,417 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32035,32048] [2022-10-17 10:56:01,418 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32083,32096] [2022-10-17 10:56:01,419 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32160,32173] [2022-10-17 10:56:01,420 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32286,32299] [2022-10-17 10:56:01,426 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32897,32910] [2022-10-17 10:56:01,428 WARN L230 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_717192eb-c206-46ab-8480-2d6c5becf6ee/sv-benchmarks/c/pthread-divine/one_time_barrier_twice_2t.i[32974,32987] [2022-10-17 10:56:01,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:56:01,467 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:56:01,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01 WrapperNode [2022-10-17 10:56:01,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:56:01,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:56:01,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:56:01,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:56:01,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,535 INFO L138 Inliner]: procedures = 174, calls = 73, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 469 [2022-10-17 10:56:01,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:56:01,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:56:01,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:56:01,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:56:01,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,615 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:56:01,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:56:01,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:56:01,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:56:01,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (1/1) ... [2022-10-17 10:56:01,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:56:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:56:01,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:56:01,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:56:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:56:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:56:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:56:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-10-17 10:56:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-10-17 10:56:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:56:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:56:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:56:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:56:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:56:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:56:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:56:01,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:56:01,731 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:56:01,943 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:56:01,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:56:02,829 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:56:02,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:56:02,847 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-10-17 10:56:02,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:56:02 BoogieIcfgContainer [2022-10-17 10:56:02,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:56:02,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:56:02,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:56:02,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:56:02,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:56:00" (1/3) ... [2022-10-17 10:56:02,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c69de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:56:02, skipping insertion in model container [2022-10-17 10:56:02,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:56:01" (2/3) ... [2022-10-17 10:56:02,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c69de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:56:02, skipping insertion in model container [2022-10-17 10:56:02,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:56:02" (3/3) ... [2022-10-17 10:56:02,865 INFO L112 eAbstractionObserver]: Analyzing ICFG one_time_barrier_twice_2t.i [2022-10-17 10:56:02,873 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:56:02,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:56:02,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-10-17 10:56:02,884 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:56:03,012 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:56:03,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 482 places, 542 transitions, 1092 flow [2022-10-17 10:56:03,402 INFO L130 PetriNetUnfolder]: 95/795 cut-off events. [2022-10-17 10:56:03,403 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:56:03,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 795 events. 95/795 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2662 event pairs, 0 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 462. Up to 4 conditions per place. [2022-10-17 10:56:03,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 482 places, 542 transitions, 1092 flow [2022-10-17 10:56:03,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 482 places, 542 transitions, 1092 flow [2022-10-17 10:56:03,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:56:03,464 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5cda964, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:56:03,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-10-17 10:56:03,473 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-10-17 10:56:03,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:56:03,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:03,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:03,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1884340507, now seen corresponding path program 1 times [2022-10-17 10:56:03,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896176641] [2022-10-17 10:56:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:03,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:56:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896176641] [2022-10-17 10:56:03,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896176641] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:03,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:56:03,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:56:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303168669] [2022-10-17 10:56:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:56:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:56:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:56:03,927 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 542 [2022-10-17 10:56:03,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 542 transitions, 1092 flow. Second operand has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 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) [2022-10-17 10:56:03,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:03,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 542 [2022-10-17 10:56:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:04,207 INFO L130 PetriNetUnfolder]: 28/734 cut-off events. [2022-10-17 10:56:04,208 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-10-17 10:56:04,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 734 events. 28/734 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2574 event pairs, 0 based on Foata normal form. 66/727 useless extension candidates. Maximal degree in co-relation 423. Up to 12 conditions per place. [2022-10-17 10:56:04,228 INFO L137 encePairwiseOnDemand]: 495/542 looper letters, 15 selfloop transitions, 2 changer transitions 0/504 dead transitions. [2022-10-17 10:56:04,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 504 transitions, 1050 flow [2022-10-17 10:56:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:56:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:56:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1524 transitions. [2022-10-17 10:56:04,256 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9372693726937269 [2022-10-17 10:56:04,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1524 transitions. [2022-10-17 10:56:04,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1524 transitions. [2022-10-17 10:56:04,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:04,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1524 transitions. [2022-10-17 10:56:04,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 508.0) internal successors, (1524), 3 states have internal predecessors, (1524), 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) [2022-10-17 10:56:04,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 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) [2022-10-17 10:56:04,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 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) [2022-10-17 10:56:04,295 INFO L175 Difference]: Start difference. First operand has 482 places, 542 transitions, 1092 flow. Second operand 3 states and 1524 transitions. [2022-10-17 10:56:04,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 504 transitions, 1050 flow [2022-10-17 10:56:04,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 504 transitions, 1050 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:56:04,321 INFO L231 Difference]: Finished difference. Result has 485 places, 499 transitions, 1016 flow [2022-10-17 10:56:04,324 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1016, PETRI_PLACES=485, PETRI_TRANSITIONS=499} [2022-10-17 10:56:04,330 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 3 predicate places. [2022-10-17 10:56:04,330 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 499 transitions, 1016 flow [2022-10-17 10:56:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 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) [2022-10-17 10:56:04,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:04,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:04,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:56:04,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1789690299, now seen corresponding path program 1 times [2022-10-17 10:56:04,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780926130] [2022-10-17 10:56:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:56:04,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:04,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780926130] [2022-10-17 10:56:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780926130] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:56:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885617651] [2022-10-17 10:56:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:04,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:56:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:56:04,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:56:04,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:56:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:56:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:56:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:56:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:56:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:56:04,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885617651] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:56:04,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:56:04,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-10-17 10:56:04,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366800968] [2022-10-17 10:56:04,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:56:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:56:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:56:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:56:04,849 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 542 [2022-10-17 10:56:04,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 499 transitions, 1016 flow. Second operand has 5 states, 5 states have (on average 490.2) internal successors, (2451), 5 states have internal predecessors, (2451), 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) [2022-10-17 10:56:04,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:04,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 542 [2022-10-17 10:56:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:05,103 INFO L130 PetriNetUnfolder]: 28/736 cut-off events. [2022-10-17 10:56:05,104 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-10-17 10:56:05,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 736 events. 28/736 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2568 event pairs, 0 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 710. Up to 7 conditions per place. [2022-10-17 10:56:05,121 INFO L137 encePairwiseOnDemand]: 538/542 looper letters, 14 selfloop transitions, 4 changer transitions 0/505 dead transitions. [2022-10-17 10:56:05,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 505 transitions, 1064 flow [2022-10-17 10:56:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:56:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:56:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1967 transitions. [2022-10-17 10:56:05,129 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9072878228782287 [2022-10-17 10:56:05,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1967 transitions. [2022-10-17 10:56:05,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1967 transitions. [2022-10-17 10:56:05,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:05,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1967 transitions. [2022-10-17 10:56:05,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 491.75) internal successors, (1967), 4 states have internal predecessors, (1967), 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) [2022-10-17 10:56:05,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:05,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:05,147 INFO L175 Difference]: Start difference. First operand has 485 places, 499 transitions, 1016 flow. Second operand 4 states and 1967 transitions. [2022-10-17 10:56:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 505 transitions, 1064 flow [2022-10-17 10:56:05,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 505 transitions, 1062 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:56:05,162 INFO L231 Difference]: Finished difference. Result has 489 places, 500 transitions, 1034 flow [2022-10-17 10:56:05,164 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1034, PETRI_PLACES=489, PETRI_TRANSITIONS=500} [2022-10-17 10:56:05,165 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 7 predicate places. [2022-10-17 10:56:05,165 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 500 transitions, 1034 flow [2022-10-17 10:56:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 490.2) internal successors, (2451), 5 states have internal predecessors, (2451), 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) [2022-10-17 10:56:05,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:05,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:05,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:56:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:56:05,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash -229323493, now seen corresponding path program 2 times [2022-10-17 10:56:05,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218533544] [2022-10-17 10:56:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:05,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218533544] [2022-10-17 10:56:05,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218533544] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:05,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:56:05,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:56:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131221154] [2022-10-17 10:56:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:05,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:56:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:56:05,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:56:05,641 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 542 [2022-10-17 10:56:05,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 500 transitions, 1034 flow. Second operand has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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) [2022-10-17 10:56:05,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:05,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 542 [2022-10-17 10:56:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:05,846 INFO L130 PetriNetUnfolder]: 28/732 cut-off events. [2022-10-17 10:56:05,846 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-10-17 10:56:05,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 732 events. 28/732 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2555 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 700. Up to 9 conditions per place. [2022-10-17 10:56:05,863 INFO L137 encePairwiseOnDemand]: 536/542 looper letters, 8 selfloop transitions, 4 changer transitions 0/496 dead transitions. [2022-10-17 10:56:05,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 496 transitions, 1050 flow [2022-10-17 10:56:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:56:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:56:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1950 transitions. [2022-10-17 10:56:05,870 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8994464944649446 [2022-10-17 10:56:05,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1950 transitions. [2022-10-17 10:56:05,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1950 transitions. [2022-10-17 10:56:05,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:05,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1950 transitions. [2022-10-17 10:56:05,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 487.5) internal successors, (1950), 4 states have internal predecessors, (1950), 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) [2022-10-17 10:56:05,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:05,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:05,888 INFO L175 Difference]: Start difference. First operand has 489 places, 500 transitions, 1034 flow. Second operand 4 states and 1950 transitions. [2022-10-17 10:56:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 496 transitions, 1050 flow [2022-10-17 10:56:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 496 transitions, 1046 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-10-17 10:56:05,923 INFO L231 Difference]: Finished difference. Result has 487 places, 496 transitions, 1030 flow [2022-10-17 10:56:05,925 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1030, PETRI_PLACES=487, PETRI_TRANSITIONS=496} [2022-10-17 10:56:05,927 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 5 predicate places. [2022-10-17 10:56:05,927 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 496 transitions, 1030 flow [2022-10-17 10:56:05,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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) [2022-10-17 10:56:05,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:05,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:05,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:56:05,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash -305101375, now seen corresponding path program 1 times [2022-10-17 10:56:05,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938460884] [2022-10-17 10:56:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938460884] [2022-10-17 10:56:06,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938460884] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:56:06,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122017714] [2022-10-17 10:56:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:56:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:56:06,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:56:06,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:56:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:56:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:56:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:06,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:56:06,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122017714] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:06,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:56:06,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-10-17 10:56:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166672010] [2022-10-17 10:56:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:56:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:56:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:56:06,437 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 542 [2022-10-17 10:56:06,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 496 transitions, 1030 flow. Second operand has 4 states, 4 states have (on average 491.25) internal successors, (1965), 4 states have internal predecessors, (1965), 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) [2022-10-17 10:56:06,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:06,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 542 [2022-10-17 10:56:06,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:06,652 INFO L130 PetriNetUnfolder]: 28/727 cut-off events. [2022-10-17 10:56:06,653 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-10-17 10:56:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 727 events. 28/727 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2517 event pairs, 0 based on Foata normal form. 0/658 useless extension candidates. Maximal degree in co-relation 695. Up to 5 conditions per place. [2022-10-17 10:56:06,667 INFO L137 encePairwiseOnDemand]: 538/542 looper letters, 7 selfloop transitions, 3 changer transitions 0/496 dead transitions. [2022-10-17 10:56:06,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 496 transitions, 1048 flow [2022-10-17 10:56:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:56:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:56:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1967 transitions. [2022-10-17 10:56:06,674 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9072878228782287 [2022-10-17 10:56:06,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1967 transitions. [2022-10-17 10:56:06,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1967 transitions. [2022-10-17 10:56:06,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:06,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1967 transitions. [2022-10-17 10:56:06,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 491.75) internal successors, (1967), 4 states have internal predecessors, (1967), 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) [2022-10-17 10:56:06,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:06,691 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 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) [2022-10-17 10:56:06,691 INFO L175 Difference]: Start difference. First operand has 487 places, 496 transitions, 1030 flow. Second operand 4 states and 1967 transitions. [2022-10-17 10:56:06,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 496 transitions, 1048 flow [2022-10-17 10:56:06,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 496 transitions, 1036 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-10-17 10:56:06,704 INFO L231 Difference]: Finished difference. Result has 486 places, 496 transitions, 1031 flow [2022-10-17 10:56:06,705 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1031, PETRI_PLACES=486, PETRI_TRANSITIONS=496} [2022-10-17 10:56:06,706 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 4 predicate places. [2022-10-17 10:56:06,706 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 496 transitions, 1031 flow [2022-10-17 10:56:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 491.25) internal successors, (1965), 4 states have internal predecessors, (1965), 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) [2022-10-17 10:56:06,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:06,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:06,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:56:06,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:56:06,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:06,936 INFO L85 PathProgramCache]: Analyzing trace with hash 47514415, now seen corresponding path program 1 times [2022-10-17 10:56:06,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:06,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021709545] [2022-10-17 10:56:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021709545] [2022-10-17 10:56:07,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021709545] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:07,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:56:07,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:56:07,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042328286] [2022-10-17 10:56:07,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:07,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:56:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:56:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:56:07,098 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 542 [2022-10-17 10:56:07,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 496 transitions, 1031 flow. Second operand has 3 states, 3 states have (on average 490.0) internal successors, (1470), 3 states have internal predecessors, (1470), 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) [2022-10-17 10:56:07,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:07,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 542 [2022-10-17 10:56:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:07,260 INFO L130 PetriNetUnfolder]: 19/533 cut-off events. [2022-10-17 10:56:07,261 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-10-17 10:56:07,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 533 events. 19/533 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1130 event pairs, 0 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 499. Up to 5 conditions per place. [2022-10-17 10:56:07,274 INFO L137 encePairwiseOnDemand]: 539/542 looper letters, 7 selfloop transitions, 2 changer transitions 0/495 dead transitions. [2022-10-17 10:56:07,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 495 transitions, 1043 flow [2022-10-17 10:56:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:56:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:56:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1477 transitions. [2022-10-17 10:56:07,279 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9083640836408364 [2022-10-17 10:56:07,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1477 transitions. [2022-10-17 10:56:07,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1477 transitions. [2022-10-17 10:56:07,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:07,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1477 transitions. [2022-10-17 10:56:07,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 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) [2022-10-17 10:56:07,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 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) [2022-10-17 10:56:07,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 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) [2022-10-17 10:56:07,292 INFO L175 Difference]: Start difference. First operand has 486 places, 496 transitions, 1031 flow. Second operand 3 states and 1477 transitions. [2022-10-17 10:56:07,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 495 transitions, 1043 flow [2022-10-17 10:56:07,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 495 transitions, 1040 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:56:07,305 INFO L231 Difference]: Finished difference. Result has 486 places, 495 transitions, 1026 flow [2022-10-17 10:56:07,306 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1026, PETRI_PLACES=486, PETRI_TRANSITIONS=495} [2022-10-17 10:56:07,307 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 4 predicate places. [2022-10-17 10:56:07,307 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 495 transitions, 1026 flow [2022-10-17 10:56:07,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 490.0) internal successors, (1470), 3 states have internal predecessors, (1470), 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) [2022-10-17 10:56:07,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:07,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:56:07,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 267906197, now seen corresponding path program 1 times [2022-10-17 10:56:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494450892] [2022-10-17 10:56:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:09,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494450892] [2022-10-17 10:56:09,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494450892] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:09,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:56:09,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-10-17 10:56:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674083657] [2022-10-17 10:56:09,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:56:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:56:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:56:09,538 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 542 [2022-10-17 10:56:09,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 495 transitions, 1026 flow. Second operand has 21 states, 21 states have (on average 371.3809523809524) internal successors, (7799), 21 states have internal predecessors, (7799), 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) [2022-10-17 10:56:09,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:09,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 542 [2022-10-17 10:56:09,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:13,405 INFO L130 PetriNetUnfolder]: 2475/12019 cut-off events. [2022-10-17 10:56:13,406 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 10:56:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16148 conditions, 12019 events. 2475/12019 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 118168 event pairs, 976 based on Foata normal form. 0/10727 useless extension candidates. Maximal degree in co-relation 16048. Up to 2878 conditions per place. [2022-10-17 10:56:13,512 INFO L137 encePairwiseOnDemand]: 521/542 looper letters, 234 selfloop transitions, 24 changer transitions 0/624 dead transitions. [2022-10-17 10:56:13,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 624 transitions, 1800 flow [2022-10-17 10:56:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:56:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-10-17 10:56:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6166 transitions. [2022-10-17 10:56:13,533 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7110239852398524 [2022-10-17 10:56:13,534 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6166 transitions. [2022-10-17 10:56:13,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6166 transitions. [2022-10-17 10:56:13,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:13,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6166 transitions. [2022-10-17 10:56:13,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 385.375) internal successors, (6166), 16 states have internal predecessors, (6166), 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) [2022-10-17 10:56:13,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 542.0) internal successors, (9214), 17 states have internal predecessors, (9214), 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) [2022-10-17 10:56:13,592 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 542.0) internal successors, (9214), 17 states have internal predecessors, (9214), 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) [2022-10-17 10:56:13,592 INFO L175 Difference]: Start difference. First operand has 486 places, 495 transitions, 1026 flow. Second operand 16 states and 6166 transitions. [2022-10-17 10:56:13,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 624 transitions, 1800 flow [2022-10-17 10:56:13,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 624 transitions, 1796 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:56:13,613 INFO L231 Difference]: Finished difference. Result has 504 places, 506 transitions, 1134 flow [2022-10-17 10:56:13,614 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1134, PETRI_PLACES=504, PETRI_TRANSITIONS=506} [2022-10-17 10:56:13,617 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 22 predicate places. [2022-10-17 10:56:13,617 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 506 transitions, 1134 flow [2022-10-17 10:56:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 371.3809523809524) internal successors, (7799), 21 states have internal predecessors, (7799), 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) [2022-10-17 10:56:13,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:13,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:13,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:56:13,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1146631376, now seen corresponding path program 1 times [2022-10-17 10:56:13,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:13,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331245752] [2022-10-17 10:56:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:56:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:15,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331245752] [2022-10-17 10:56:15,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331245752] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:56:15,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:56:15,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-10-17 10:56:15,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573028260] [2022-10-17 10:56:15,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:56:15,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:56:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:56:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:56:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:56:15,790 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 542 [2022-10-17 10:56:15,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 506 transitions, 1134 flow. Second operand has 21 states, 21 states have (on average 371.42857142857144) internal successors, (7800), 21 states have internal predecessors, (7800), 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) [2022-10-17 10:56:15,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:56:15,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 542 [2022-10-17 10:56:15,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:56:19,334 INFO L130 PetriNetUnfolder]: 2501/12492 cut-off events. [2022-10-17 10:56:19,334 INFO L131 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2022-10-17 10:56:19,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17256 conditions, 12492 events. 2501/12492 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 123751 event pairs, 1016 based on Foata normal form. 0/11216 useless extension candidates. Maximal degree in co-relation 17144. Up to 2929 conditions per place. [2022-10-17 10:56:19,420 INFO L137 encePairwiseOnDemand]: 522/542 looper letters, 234 selfloop transitions, 26 changer transitions 0/629 dead transitions. [2022-10-17 10:56:19,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 629 transitions, 1921 flow [2022-10-17 10:56:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:56:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-10-17 10:56:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6165 transitions. [2022-10-17 10:56:19,439 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7109086715867159 [2022-10-17 10:56:19,439 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6165 transitions. [2022-10-17 10:56:19,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6165 transitions. [2022-10-17 10:56:19,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:56:19,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6165 transitions. [2022-10-17 10:56:19,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 385.3125) internal successors, (6165), 16 states have internal predecessors, (6165), 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) [2022-10-17 10:56:19,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 542.0) internal successors, (9214), 17 states have internal predecessors, (9214), 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) [2022-10-17 10:56:19,483 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 542.0) internal successors, (9214), 17 states have internal predecessors, (9214), 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) [2022-10-17 10:56:19,483 INFO L175 Difference]: Start difference. First operand has 504 places, 506 transitions, 1134 flow. Second operand 16 states and 6165 transitions. [2022-10-17 10:56:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 629 transitions, 1921 flow [2022-10-17 10:56:19,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 629 transitions, 1897 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-10-17 10:56:19,504 INFO L231 Difference]: Finished difference. Result has 514 places, 512 transitions, 1207 flow [2022-10-17 10:56:19,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1207, PETRI_PLACES=514, PETRI_TRANSITIONS=512} [2022-10-17 10:56:19,506 INFO L287 CegarLoopForPetriNet]: 482 programPoint places, 32 predicate places. [2022-10-17 10:56:19,506 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 512 transitions, 1207 flow [2022-10-17 10:56:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 371.42857142857144) internal successors, (7800), 21 states have internal predecessors, (7800), 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) [2022-10-17 10:56:19,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:56:19,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:56:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:56:19,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2022-10-17 10:56:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:56:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1809153885, now seen corresponding path program 1 times [2022-10-17 10:56:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:56:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672143700] [2022-10-17 10:56:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:56:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:56:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:56:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672143700] [2022-10-17 10:56:26,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672143700] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:56:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608949604] [2022-10-17 10:56:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:56:26,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:56:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:56:26,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:56:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717192eb-c206-46ab-8480-2d6c5becf6ee/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:56:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:56:26,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 73 conjunts are in the unsatisfiable core [2022-10-17 10:56:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:56:27,497 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 10:56:27,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-10-17 10:56:27,716 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-10-17 10:56:27,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-10-17 10:56:27,990 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-17 10:56:27,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-10-17 10:56:28,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2022-10-17 10:56:28,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2022-10-17 10:56:28,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33