./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/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 658086e6a2b970f68ba6fa20919311f7cc4c75e1705e5ad288c4fd1e6439159f --- 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 10:17:10,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:17:10,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:17:11,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:17:11,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:17:11,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:17:11,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:17:11,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:17:11,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:17:11,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:17:11,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:17:11,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:17:11,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:17:11,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:17:11,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:17:11,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:17:11,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:17:11,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:17:11,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:17:11,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:17:11,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:17:11,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:17:11,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:17:11,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:17:11,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:17:11,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:17:11,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:17:11,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:17:11,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:17:11,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:17:11,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:17:11,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:17:11,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:17:11,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:17:11,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:17:11,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:17:11,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:17:11,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:17:11,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:17:11,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:17:11,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:17:11,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:17:11,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:17:11,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:17:11,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:17:11,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:17:11,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:17:11,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:17:11,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:17:11,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:17:11,097 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:17:11,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:17:11,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:17:11,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:17:11,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:17:11,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:17:11,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:17:11,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:17:11,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:17:11,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:17:11,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:17:11,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:17:11,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:17:11,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:17:11,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:17:11,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:17:11,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:17:11,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:17:11,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:17:11,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:17:11,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:17:11,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:17:11,103 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:17:11,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:17:11,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:17:11,104 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 658086e6a2b970f68ba6fa20919311f7cc4c75e1705e5ad288c4fd1e6439159f [2022-10-17 10:17:11,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:17:11,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:17:11,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:17:11,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:17:11,413 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:17:11,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i [2022-10-17 10:17:11,482 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/data/02c364af5/1f82e145e34a452da2d659ecbb3cff22/FLAG5b9bec71c [2022-10-17 10:17:12,115 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:17:12,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i [2022-10-17 10:17:12,153 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/data/02c364af5/1f82e145e34a452da2d659ecbb3cff22/FLAG5b9bec71c [2022-10-17 10:17:12,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/data/02c364af5/1f82e145e34a452da2d659ecbb3cff22 [2022-10-17 10:17:12,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:17:12,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:17:12,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:17:12,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:17:12,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:17:12,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:17:12" (1/1) ... [2022-10-17 10:17:12,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e919a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:12, skipping insertion in model container [2022-10-17 10:17:12,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:17:12" (1/1) ... [2022-10-17 10:17:12,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:17:12,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:17:12,693 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:17:12,929 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30448,30461] [2022-10-17 10:17:12,940 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30811,30824] [2022-10-17 10:17:12,961 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31483,31496] [2022-10-17 10:17:12,963 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31534,31547] [2022-10-17 10:17:12,967 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31683,31696] [2022-10-17 10:17:12,970 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31760,31773] [2022-10-17 10:17:12,976 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31807,31820] [2022-10-17 10:17:12,979 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31916,31929] [2022-10-17 10:17:12,981 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32035,32048] [2022-10-17 10:17:12,983 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32083,32096] [2022-10-17 10:17:12,986 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32160,32173] [2022-10-17 10:17:12,990 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32286,32299] [2022-10-17 10:17:13,013 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32869,32882] [2022-10-17 10:17:13,014 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32946,32959] [2022-10-17 10:17:13,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:13,030 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:17:13,050 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:17:13,092 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30448,30461] [2022-10-17 10:17:13,098 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30811,30824] [2022-10-17 10:17:13,107 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31483,31496] [2022-10-17 10:17:13,110 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31534,31547] [2022-10-17 10:17:13,114 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31683,31696] [2022-10-17 10:17:13,117 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31760,31773] [2022-10-17 10:17:13,124 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31807,31820] [2022-10-17 10:17:13,127 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31916,31929] [2022-10-17 10:17:13,131 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32035,32048] [2022-10-17 10:17:13,134 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32083,32096] [2022-10-17 10:17:13,136 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32160,32173] [2022-10-17 10:17:13,138 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32286,32299] [2022-10-17 10:17:13,149 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32869,32882] [2022-10-17 10:17:13,154 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_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32946,32959] [2022-10-17 10:17:13,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:13,216 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:17:13,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13 WrapperNode [2022-10-17 10:17:13,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:17:13,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:13,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:17:13,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:17:13,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,316 INFO L138 Inliner]: procedures = 174, calls = 75, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 464 [2022-10-17 10:17:13,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:13,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:17:13,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:17:13,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:17:13,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,421 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:17:13,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:17:13,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:17:13,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:17:13,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (1/1) ... [2022-10-17 10:17:13,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:17:13,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:13,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:17:13,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:17:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:17:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:17:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-10-17 10:17:13,526 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:17:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:17:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:17:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:17:13,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:17:13,529 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 10:17:13,698 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:17:13,700 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:17:14,702 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:17:14,719 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:17:14,720 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-10-17 10:17:14,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:14 BoogieIcfgContainer [2022-10-17 10:17:14,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:17:14,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:17:14,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:17:14,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:17:14,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:17:12" (1/3) ... [2022-10-17 10:17:14,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2129133c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:14, skipping insertion in model container [2022-10-17 10:17:14,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:13" (2/3) ... [2022-10-17 10:17:14,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2129133c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:14, skipping insertion in model container [2022-10-17 10:17:14,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:14" (3/3) ... [2022-10-17 10:17:14,733 INFO L112 eAbstractionObserver]: Analyzing ICFG one_time_barrier_3t.i [2022-10-17 10:17:14,743 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:17:14,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:17:14,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-10-17 10:17:14,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:17:14,912 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:17:14,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1072 flow [2022-10-17 10:17:15,419 INFO L130 PetriNetUnfolder]: 94/783 cut-off events. [2022-10-17 10:17:15,419 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:17:15,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 783 events. 94/783 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2651 event pairs, 0 based on Foata normal form. 0/645 useless extension candidates. Maximal degree in co-relation 460. Up to 4 conditions per place. [2022-10-17 10:17:15,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1072 flow [2022-10-17 10:17:15,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1072 flow [2022-10-17 10:17:15,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:15,510 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;@6f07abfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:15,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-10-17 10:17:15,523 INFO L130 PetriNetUnfolder]: 3/58 cut-off events. [2022-10-17 10:17:15,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:15,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:15,524 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] [2022-10-17 10:17:15,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-10-17 10:17:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1416560676, now seen corresponding path program 1 times [2022-10-17 10:17:15,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:15,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621197699] [2022-10-17 10:17:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:15,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:16,009 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 10:17:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621197699] [2022-10-17 10:17:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621197699] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:16,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:16,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:17:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600869616] [2022-10-17 10:17:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:16,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:17:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:17:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:17:16,075 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 532 [2022-10-17 10:17:16,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1072 flow. Second operand has 3 states, 3 states have (on average 479.0) internal successors, (1437), 3 states have internal predecessors, (1437), 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 10:17:16,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:16,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 532 [2022-10-17 10:17:16,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:16,423 INFO L130 PetriNetUnfolder]: 28/723 cut-off events. [2022-10-17 10:17:16,424 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-10-17 10:17:16,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 723 events. 28/723 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2556 event pairs, 0 based on Foata normal form. 65/716 useless extension candidates. Maximal degree in co-relation 421. Up to 12 conditions per place. [2022-10-17 10:17:16,444 INFO L137 encePairwiseOnDemand]: 486/532 looper letters, 15 selfloop transitions, 2 changer transitions 0/495 dead transitions. [2022-10-17 10:17:16,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 495 transitions, 1032 flow [2022-10-17 10:17:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:17:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:17:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1496 transitions. [2022-10-17 10:17:16,477 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9373433583959899 [2022-10-17 10:17:16,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1496 transitions. [2022-10-17 10:17:16,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1496 transitions. [2022-10-17 10:17:16,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:16,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1496 transitions. [2022-10-17 10:17:16,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 498.6666666666667) internal successors, (1496), 3 states have internal predecessors, (1496), 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 10:17:16,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 10:17:16,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 10:17:16,527 INFO L175 Difference]: Start difference. First operand has 473 places, 532 transitions, 1072 flow. Second operand 3 states and 1496 transitions. [2022-10-17 10:17:16,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 495 transitions, 1032 flow [2022-10-17 10:17:16,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 495 transitions, 1032 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:16,555 INFO L231 Difference]: Finished difference. Result has 476 places, 490 transitions, 998 flow [2022-10-17 10:17:16,560 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=998, PETRI_PLACES=476, PETRI_TRANSITIONS=490} [2022-10-17 10:17:16,564 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 3 predicate places. [2022-10-17 10:17:16,564 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 490 transitions, 998 flow [2022-10-17 10:17:16,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 479.0) internal successors, (1437), 3 states have internal predecessors, (1437), 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 10:17:16,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:16,574 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:16,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:17:16,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-10-17 10:17:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1160245700, now seen corresponding path program 1 times [2022-10-17 10:17:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:16,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096729205] [2022-10-17 10:17:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:16,851 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 10:17:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:16,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096729205] [2022-10-17 10:17:16,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096729205] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:16,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004047582] [2022-10-17 10:17:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:16,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:16,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:17:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:17,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:17:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:17,149 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 10:17:17,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:17,199 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 10:17:17,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004047582] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:17,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:17,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-17 10:17:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254104142] [2022-10-17 10:17:17,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:17,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:17,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:17:17,210 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 532 [2022-10-17 10:17:17,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 490 transitions, 998 flow. Second operand has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 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 10:17:17,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:17,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 532 [2022-10-17 10:17:17,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:17,502 INFO L130 PetriNetUnfolder]: 28/732 cut-off events. [2022-10-17 10:17:17,502 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-10-17 10:17:17,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 732 events. 28/732 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2537 event pairs, 0 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 708. Up to 7 conditions per place. [2022-10-17 10:17:17,524 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 19 selfloop transitions, 5 changer transitions 0/502 dead transitions. [2022-10-17 10:17:17,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 502 transitions, 1072 flow [2022-10-17 10:17:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:17:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:17:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2416 transitions. [2022-10-17 10:17:17,536 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9082706766917293 [2022-10-17 10:17:17,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2416 transitions. [2022-10-17 10:17:17,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2416 transitions. [2022-10-17 10:17:17,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:17,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2416 transitions. [2022-10-17 10:17:17,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 483.2) internal successors, (2416), 5 states have internal predecessors, (2416), 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 10:17:17,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 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 10:17:17,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 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 10:17:17,563 INFO L175 Difference]: Start difference. First operand has 476 places, 490 transitions, 998 flow. Second operand 5 states and 2416 transitions. [2022-10-17 10:17:17,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 502 transitions, 1072 flow [2022-10-17 10:17:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 502 transitions, 1070 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:17,582 INFO L231 Difference]: Finished difference. Result has 482 places, 492 transitions, 1026 flow [2022-10-17 10:17:17,583 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1026, PETRI_PLACES=482, PETRI_TRANSITIONS=492} [2022-10-17 10:17:17,584 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 9 predicate places. [2022-10-17 10:17:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 492 transitions, 1026 flow [2022-10-17 10:17:17,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 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 10:17:17,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:17,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:17,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:17,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-10-17 10:17:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2075425340, now seen corresponding path program 2 times [2022-10-17 10:17:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:17,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374249018] [2022-10-17 10:17:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:17:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374249018] [2022-10-17 10:17:18,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374249018] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:18,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:18,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:17:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909929695] [2022-10-17 10:17:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:17:18,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:17:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:17:18,074 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 532 [2022-10-17 10:17:18,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 492 transitions, 1026 flow. Second operand has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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 10:17:18,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:18,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 532 [2022-10-17 10:17:18,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:18,332 INFO L130 PetriNetUnfolder]: 28/730 cut-off events. [2022-10-17 10:17:18,332 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-10-17 10:17:18,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 730 events. 28/730 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2534 event pairs, 0 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 682. Up to 5 conditions per place. [2022-10-17 10:17:18,353 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 5 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-10-17 10:17:18,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 490 transitions, 1036 flow [2022-10-17 10:17:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:17:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:17:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1932 transitions. [2022-10-17 10:17:18,361 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9078947368421053 [2022-10-17 10:17:18,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1932 transitions. [2022-10-17 10:17:18,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1932 transitions. [2022-10-17 10:17:18,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:18,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1932 transitions. [2022-10-17 10:17:18,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 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 10:17:18,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 10:17:18,381 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 10:17:18,382 INFO L175 Difference]: Start difference. First operand has 482 places, 492 transitions, 1026 flow. Second operand 4 states and 1932 transitions. [2022-10-17 10:17:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 490 transitions, 1036 flow [2022-10-17 10:17:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 490 transitions, 1030 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:18,398 INFO L231 Difference]: Finished difference. Result has 482 places, 490 transitions, 1020 flow [2022-10-17 10:17:18,400 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1020, PETRI_PLACES=482, PETRI_TRANSITIONS=490} [2022-10-17 10:17:18,401 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 9 predicate places. [2022-10-17 10:17:18,401 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 490 transitions, 1020 flow [2022-10-17 10:17:18,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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 10:17:18,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:18,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 10:17:18,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:17:18,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-10-17 10:17:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash 591066944, now seen corresponding path program 1 times [2022-10-17 10:17:18,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969373263] [2022-10-17 10:17:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:18,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:17:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:18,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:17:18,609 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:17:18,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2022-10-17 10:17:18,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (38 of 40 remaining) [2022-10-17 10:17:18,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (37 of 40 remaining) [2022-10-17 10:17:18,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (36 of 40 remaining) [2022-10-17 10:17:18,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (35 of 40 remaining) [2022-10-17 10:17:18,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (34 of 40 remaining) [2022-10-17 10:17:18,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (33 of 40 remaining) [2022-10-17 10:17:18,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (32 of 40 remaining) [2022-10-17 10:17:18,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (31 of 40 remaining) [2022-10-17 10:17:18,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (30 of 40 remaining) [2022-10-17 10:17:18,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION (29 of 40 remaining) [2022-10-17 10:17:18,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION (28 of 40 remaining) [2022-10-17 10:17:18,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION (27 of 40 remaining) [2022-10-17 10:17:18,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION (26 of 40 remaining) [2022-10-17 10:17:18,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION (25 of 40 remaining) [2022-10-17 10:17:18,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION (24 of 40 remaining) [2022-10-17 10:17:18,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (23 of 40 remaining) [2022-10-17 10:17:18,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (22 of 40 remaining) [2022-10-17 10:17:18,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (21 of 40 remaining) [2022-10-17 10:17:18,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (20 of 40 remaining) [2022-10-17 10:17:18,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (19 of 40 remaining) [2022-10-17 10:17:18,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (18 of 40 remaining) [2022-10-17 10:17:18,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (17 of 40 remaining) [2022-10-17 10:17:18,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (16 of 40 remaining) [2022-10-17 10:17:18,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr10ASSERT_VIOLATIONERROR_FUNCTION (15 of 40 remaining) [2022-10-17 10:17:18,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (14 of 40 remaining) [2022-10-17 10:17:18,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr11ASSERT_VIOLATIONERROR_FUNCTION (13 of 40 remaining) [2022-10-17 10:17:18,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (12 of 40 remaining) [2022-10-17 10:17:18,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (11 of 40 remaining) [2022-10-17 10:17:18,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (10 of 40 remaining) [2022-10-17 10:17:18,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (9 of 40 remaining) [2022-10-17 10:17:18,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (8 of 40 remaining) [2022-10-17 10:17:18,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (7 of 40 remaining) [2022-10-17 10:17:18,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (6 of 40 remaining) [2022-10-17 10:17:18,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (5 of 40 remaining) [2022-10-17 10:17:18,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (4 of 40 remaining) [2022-10-17 10:17:18,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr10ASSERT_VIOLATIONERROR_FUNCTION (3 of 40 remaining) [2022-10-17 10:17:18,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (2 of 40 remaining) [2022-10-17 10:17:18,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr11ASSERT_VIOLATIONERROR_FUNCTION (1 of 40 remaining) [2022-10-17 10:17:18,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (0 of 40 remaining) [2022-10-17 10:17:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:17:18,626 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-10-17 10:17:18,629 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:17:18,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:17:18,749 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:17:18,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 738 transitions, 1494 flow [2022-10-17 10:17:19,268 INFO L130 PetriNetUnfolder]: 159/1289 cut-off events. [2022-10-17 10:17:19,269 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:17:19,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 1289 events. 159/1289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5771 event pairs, 0 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 785. Up to 8 conditions per place. [2022-10-17 10:17:19,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 738 transitions, 1494 flow [2022-10-17 10:17:19,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 654 places, 738 transitions, 1494 flow [2022-10-17 10:17:19,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:19,380 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;@6f07abfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:19,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-10-17 10:17:19,392 INFO L130 PetriNetUnfolder]: 3/58 cut-off events. [2022-10-17 10:17:19,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:19,393 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] [2022-10-17 10:17:19,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-10-17 10:17:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash -486723617, now seen corresponding path program 1 times [2022-10-17 10:17:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:19,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531164074] [2022-10-17 10:17:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:19,475 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 10:17:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531164074] [2022-10-17 10:17:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531164074] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:19,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:17:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291109805] [2022-10-17 10:17:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:17:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:17:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:17:19,481 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 673 out of 738 [2022-10-17 10:17:19,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 738 transitions, 1494 flow. Second operand has 2 states, 2 states have (on average 673.5) internal successors, (1347), 2 states have internal predecessors, (1347), 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 10:17:19,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:19,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 673 of 738 [2022-10-17 10:17:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:20,081 INFO L130 PetriNetUnfolder]: 48/1178 cut-off events. [2022-10-17 10:17:20,082 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-10-17 10:17:20,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 1178 events. 48/1178 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5603 event pairs, 0 based on Foata normal form. 148/1205 useless extension candidates. Maximal degree in co-relation 721. Up to 8 conditions per place. [2022-10-17 10:17:20,130 INFO L137 encePairwiseOnDemand]: 677/738 looper letters, 4 selfloop transitions, 0 changer transitions 0/677 dead transitions. [2022-10-17 10:17:20,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 677 transitions, 1380 flow [2022-10-17 10:17:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:17:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:17:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1411 transitions. [2022-10-17 10:17:20,137 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9559620596205962 [2022-10-17 10:17:20,137 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1411 transitions. [2022-10-17 10:17:20,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1411 transitions. [2022-10-17 10:17:20,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:20,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1411 transitions. [2022-10-17 10:17:20,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 705.5) internal successors, (1411), 2 states have internal predecessors, (1411), 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 10:17:20,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 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 10:17:20,153 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 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 10:17:20,153 INFO L175 Difference]: Start difference. First operand has 654 places, 738 transitions, 1494 flow. Second operand 2 states and 1411 transitions. [2022-10-17 10:17:20,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 677 transitions, 1380 flow [2022-10-17 10:17:20,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 677 transitions, 1380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:20,173 INFO L231 Difference]: Finished difference. Result has 655 places, 677 transitions, 1372 flow [2022-10-17 10:17:20,175 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=738, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1372, PETRI_PLACES=655, PETRI_TRANSITIONS=677} [2022-10-17 10:17:20,176 INFO L287 CegarLoopForPetriNet]: 654 programPoint places, 1 predicate places. [2022-10-17 10:17:20,176 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 677 transitions, 1372 flow [2022-10-17 10:17:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 673.5) internal successors, (1347), 2 states have internal predecessors, (1347), 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 10:17:20,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:20,178 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] [2022-10-17 10:17:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:17:20,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-10-17 10:17:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1256086718, now seen corresponding path program 1 times [2022-10-17 10:17:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946457154] [2022-10-17 10:17:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:20,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:20,234 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 10:17:20,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946457154] [2022-10-17 10:17:20,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946457154] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:20,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:20,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:17:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893104266] [2022-10-17 10:17:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:20,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:17:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:17:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:17:20,241 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 664 out of 738 [2022-10-17 10:17:20,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 677 transitions, 1372 flow. Second operand has 3 states, 3 states have (on average 665.0) internal successors, (1995), 3 states have internal predecessors, (1995), 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 10:17:20,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:20,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 664 of 738 [2022-10-17 10:17:20,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:20,831 INFO L130 PetriNetUnfolder]: 48/1184 cut-off events. [2022-10-17 10:17:20,831 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-10-17 10:17:20,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 1184 events. 48/1184 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5636 event pairs, 0 based on Foata normal form. 0/1063 useless extension candidates. Maximal degree in co-relation 1216. Up to 16 conditions per place. [2022-10-17 10:17:20,879 INFO L137 encePairwiseOnDemand]: 735/738 looper letters, 17 selfloop transitions, 2 changer transitions 0/683 dead transitions. [2022-10-17 10:17:20,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 683 transitions, 1422 flow [2022-10-17 10:17:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:17:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:17:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2012 transitions. [2022-10-17 10:17:20,888 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9087624209575429 [2022-10-17 10:17:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2012 transitions. [2022-10-17 10:17:20,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2012 transitions. [2022-10-17 10:17:20,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:20,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2012 transitions. [2022-10-17 10:17:20,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 670.6666666666666) internal successors, (2012), 3 states have internal predecessors, (2012), 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 10:17:20,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 738.0) internal successors, (2952), 4 states have internal predecessors, (2952), 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 10:17:20,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 738.0) internal successors, (2952), 4 states have internal predecessors, (2952), 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 10:17:20,911 INFO L175 Difference]: Start difference. First operand has 655 places, 677 transitions, 1372 flow. Second operand 3 states and 2012 transitions. [2022-10-17 10:17:20,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 683 transitions, 1422 flow [2022-10-17 10:17:20,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 683 transitions, 1422 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:20,932 INFO L231 Difference]: Finished difference. Result has 658 places, 678 transitions, 1384 flow [2022-10-17 10:17:20,934 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=738, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1384, PETRI_PLACES=658, PETRI_TRANSITIONS=678} [2022-10-17 10:17:20,935 INFO L287 CegarLoopForPetriNet]: 654 programPoint places, 4 predicate places. [2022-10-17 10:17:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 678 transitions, 1384 flow [2022-10-17 10:17:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 665.0) internal successors, (1995), 3 states have internal predecessors, (1995), 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 10:17:20,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:20,938 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:17:20,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-10-17 10:17:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -253852356, now seen corresponding path program 1 times [2022-10-17 10:17:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:20,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561294037] [2022-10-17 10:17:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:21,029 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 10:17:21,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561294037] [2022-10-17 10:17:21,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561294037] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017543153] [2022-10-17 10:17:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:21,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:21,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:21,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:21,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:17:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:17:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:21,243 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 10:17:21,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:21,277 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 10:17:21,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017543153] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:21,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:21,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-17 10:17:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178030596] [2022-10-17 10:17:21,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:17:21,289 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 664 out of 738 [2022-10-17 10:17:21,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 678 transitions, 1384 flow. Second operand has 6 states, 6 states have (on average 668.0) internal successors, (4008), 6 states have internal predecessors, (4008), 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 10:17:21,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:21,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 664 of 738 [2022-10-17 10:17:21,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:21,863 INFO L130 PetriNetUnfolder]: 48/1193 cut-off events. [2022-10-17 10:17:21,863 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-10-17 10:17:21,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 1193 events. 48/1193 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5587 event pairs, 0 based on Foata normal form. 2/1075 useless extension candidates. Maximal degree in co-relation 1238. Up to 10 conditions per place. [2022-10-17 10:17:21,920 INFO L137 encePairwiseOnDemand]: 734/738 looper letters, 21 selfloop transitions, 5 changer transitions 0/690 dead transitions. [2022-10-17 10:17:21,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 690 transitions, 1462 flow [2022-10-17 10:17:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:17:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:17:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3348 transitions. [2022-10-17 10:17:21,933 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9073170731707317 [2022-10-17 10:17:21,934 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3348 transitions. [2022-10-17 10:17:21,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3348 transitions. [2022-10-17 10:17:21,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:21,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3348 transitions. [2022-10-17 10:17:21,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 669.6) internal successors, (3348), 5 states have internal predecessors, (3348), 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 10:17:21,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 738.0) internal successors, (4428), 6 states have internal predecessors, (4428), 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 10:17:21,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 738.0) internal successors, (4428), 6 states have internal predecessors, (4428), 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 10:17:21,970 INFO L175 Difference]: Start difference. First operand has 658 places, 678 transitions, 1384 flow. Second operand 5 states and 3348 transitions. [2022-10-17 10:17:21,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 690 transitions, 1462 flow [2022-10-17 10:17:21,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 690 transitions, 1460 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:22,045 INFO L231 Difference]: Finished difference. Result has 664 places, 680 transitions, 1412 flow [2022-10-17 10:17:22,047 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=738, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=657, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1412, PETRI_PLACES=664, PETRI_TRANSITIONS=680} [2022-10-17 10:17:22,049 INFO L287 CegarLoopForPetriNet]: 654 programPoint places, 10 predicate places. [2022-10-17 10:17:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 680 transitions, 1412 flow [2022-10-17 10:17:22,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 668.0) internal successors, (4008), 6 states have internal predecessors, (4008), 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 10:17:22,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:22,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:22,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:22,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d808e46-c8b7-42be-b82c-d9cc9ef3848b/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:22,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-10-17 10:17:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2092046596, now seen corresponding path program 2 times [2022-10-17 10:17:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:22,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850589879] [2022-10-17 10:17:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:17:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850589879] [2022-10-17 10:17:22,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850589879] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:22,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:22,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:17:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354391135] [2022-10-17 10:17:22,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:17:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:17:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:17:22,454 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 667 out of 738 [2022-10-17 10:17:22,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 680 transitions, 1412 flow. Second operand has 4 states, 4 states have (on average 668.0) internal successors, (2672), 4 states have internal predecessors, (2672), 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 10:17:22,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:22,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 667 of 738 [2022-10-17 10:17:22,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:23,011 INFO L130 PetriNetUnfolder]: 48/1191 cut-off events. [2022-10-17 10:17:23,011 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-10-17 10:17:23,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 1191 events. 48/1191 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5595 event pairs, 0 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 1232. Up to 9 conditions per place. [2022-10-17 10:17:23,054 INFO L137 encePairwiseOnDemand]: 735/738 looper letters, 7 selfloop transitions, 2 changer transitions 0/678 dead transitions. [2022-10-17 10:17:23,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 678 transitions, 1426 flow [2022-10-17 10:17:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:17:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:17:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2678 transitions. [2022-10-17 10:17:23,065 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9071815718157181 [2022-10-17 10:17:23,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2678 transitions. [2022-10-17 10:17:23,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2678 transitions. [2022-10-17 10:17:23,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:23,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2678 transitions. [2022-10-17 10:17:23,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 669.5) internal successors, (2678), 4 states have internal predecessors, (2678), 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 10:17:23,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 738.0) internal successors, (3690), 5 states have internal predecessors, (3690), 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 10:17:23,089 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 738.0) internal successors, (3690), 5 states have internal predecessors, (3690), 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 10:17:23,089 INFO L175 Difference]: Start difference. First operand has 664 places, 680 transitions, 1412 flow. Second operand 4 states and 2678 transitions. [2022-10-17 10:17:23,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 678 transitions, 1426 flow [2022-10-17 10:17:23,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 678 transitions, 1420 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:23,110 INFO L231 Difference]: Finished difference. Result has 664 places, 678 transitions, 1406 flow [2022-10-17 10:17:23,112 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=738, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1406, PETRI_PLACES=664, PETRI_TRANSITIONS=678} [2022-10-17 10:17:23,113 INFO L287 CegarLoopForPetriNet]: 654 programPoint places, 10 predicate places. [2022-10-17 10:17:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 678 transitions, 1406 flow [2022-10-17 10:17:23,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 668.0) internal successors, (2672), 4 states have internal predecessors, (2672), 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 10:17:23,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:23,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:17:23,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-10-17 10:17:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash -649049766, now seen corresponding path program 1 times [2022-10-17 10:17:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570352497] [2022-10-17 10:17:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:17:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:26,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570352497] [2022-10-17 10:17:26,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570352497] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:26,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:26,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-10-17 10:17:26,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311774070] [2022-10-17 10:17:26,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:17:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:17:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:17:26,025 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 518 out of 738 [2022-10-17 10:17:26,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 678 transitions, 1406 flow. Second operand has 17 states, 17 states have (on average 520.8235294117648) internal successors, (8854), 17 states have internal predecessors, (8854), 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 10:17:26,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:26,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 518 of 738 [2022-10-17 10:17:26,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand