./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8 --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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- 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-2329fc7 [2022-12-13 16:59:56,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:59:56,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:59:56,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:59:56,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:59:56,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:59:56,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:59:56,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:59:56,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:59:56,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:59:56,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:59:56,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:59:56,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:59:56,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:59:56,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:59:56,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:59:56,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:59:56,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:59:56,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:59:56,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:59:56,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:59:56,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:59:56,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:59:56,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:59:56,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:59:56,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:59:56,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:59:56,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:59:56,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:59:56,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:59:56,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:59:56,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:59:56,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:59:56,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:59:56,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:59:56,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:59:56,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:59:56,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:59:56,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:59:56,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:59:56,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:59:56,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:59:56,206 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:59:56,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:59:56,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:59:56,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:59:56,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:59:56,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:59:56,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:59:56,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:59:56,208 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:59:56,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:59:56,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:59:56,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:59:56,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:59:56,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:59:56,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:59:56,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:59:56,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:59:56,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:59:56,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:59:56,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:59:56,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:59:56,212 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:59:56,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:59:56,213 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:59:56,213 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2022-12-13 16:59:56,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:59:56,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:59:56,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:59:56,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:59:56,393 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:59:56,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-12-13 16:59:58,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:59:59,146 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:59:59,146 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-12-13 16:59:59,156 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/data/bbc18b2d8/b4f1ad51e34d47baadc70d32f604394e/FLAGa4b7d4c3a [2022-12-13 16:59:59,517 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/data/bbc18b2d8/b4f1ad51e34d47baadc70d32f604394e [2022-12-13 16:59:59,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:59:59,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:59:59,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:59:59,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:59:59,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:59:59,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b57e31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59, skipping insertion in model container [2022-12-13 16:59:59,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:59:59,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:59:59,691 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 16:59:59,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,792 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-13 16:59:59,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:59:59,807 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:59:59,817 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 16:59:59,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,838 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-13 16:59:59,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:59:59,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:59:59,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:59:59,866 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:59:59,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59 WrapperNode [2022-12-13 16:59:59,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:59:59,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:59:59,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:59:59,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:59:59,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,905 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-12-13 16:59:59,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:59:59,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:59:59,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:59:59,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:59:59,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,927 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:59:59,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:59:59,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:59:59,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:59:59,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (1/1) ... [2022-12-13 16:59:59,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:59:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:59:59,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:59:59,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:59:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:59:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-12-13 16:59:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:59:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:59:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:59:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:59:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:59:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-12-13 16:59:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-12-13 16:59:59,997 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:00:00,092 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:00:00,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:00:00,234 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:00:00,261 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:00:00,261 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 17:00:00,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:00:00 BoogieIcfgContainer [2022-12-13 17:00:00,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:00:00,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:00:00,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:00:00,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:00:00,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:59:59" (1/3) ... [2022-12-13 17:00:00,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e8bc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:00:00, skipping insertion in model container [2022-12-13 17:00:00,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:59:59" (2/3) ... [2022-12-13 17:00:00,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e8bc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:00:00, skipping insertion in model container [2022-12-13 17:00:00,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:00:00" (3/3) ... [2022-12-13 17:00:00,270 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-12-13 17:00:00,277 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:00:00,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:00:00,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:00:00,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:00:00,352 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:00:00,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2022-12-13 17:00:00,440 INFO L130 PetriNetUnfolder]: 2/110 cut-off events. [2022-12-13 17:00:00,441 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:00:00,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2022-12-13 17:00:00,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 114 transitions, 260 flow [2022-12-13 17:00:00,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 213 flow [2022-12-13 17:00:00,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:00:00,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 96 transitions, 213 flow [2022-12-13 17:00:00,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 96 transitions, 213 flow [2022-12-13 17:00:00,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 96 transitions, 213 flow [2022-12-13 17:00:00,494 INFO L130 PetriNetUnfolder]: 2/96 cut-off events. [2022-12-13 17:00:00,494 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:00:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 96 events. 2/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2022-12-13 17:00:00,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2022-12-13 17:00:02,405 INFO L134 LiptonReduction]: Checked pairs total: 9477 [2022-12-13 17:00:02,406 INFO L136 LiptonReduction]: Total number of compositions: 65 [2022-12-13 17:00:02,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:00:02,420 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;@2c93c9d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:00:02,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:00:02,424 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2022-12-13 17:00:02,424 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:00:02,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:02,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:02,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1082577099, now seen corresponding path program 1 times [2022-12-13 17:00:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:02,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416559914] [2022-12-13 17:00:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:02,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416559914] [2022-12-13 17:00:02,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416559914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:02,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:02,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:00:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458434770] [2022-12-13 17:00:02,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:00:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:00:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:00:02,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 179 [2022-12-13 17:00:02,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 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) [2022-12-13 17:00:02,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:02,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 179 [2022-12-13 17:00:02,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:03,960 INFO L130 PetriNetUnfolder]: 11095/17074 cut-off events. [2022-12-13 17:00:03,960 INFO L131 PetriNetUnfolder]: For 1590/1590 co-relation queries the response was YES. [2022-12-13 17:00:04,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33594 conditions, 17074 events. 11095/17074 cut-off events. For 1590/1590 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 114510 event pairs, 1895 based on Foata normal form. 440/17432 useless extension candidates. Maximal degree in co-relation 26552. Up to 7825 conditions per place. [2022-12-13 17:00:04,064 INFO L137 encePairwiseOnDemand]: 169/179 looper letters, 132 selfloop transitions, 26 changer transitions 4/167 dead transitions. [2022-12-13 17:00:04,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 167 transitions, 742 flow [2022-12-13 17:00:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:00:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:00:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 977 transitions. [2022-12-13 17:00:04,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.606455617628802 [2022-12-13 17:00:04,093 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 977 transitions. [2022-12-13 17:00:04,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 977 transitions. [2022-12-13 17:00:04,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:04,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 977 transitions. [2022-12-13 17:00:04,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.55555555555556) internal successors, (977), 9 states have internal predecessors, (977), 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) [2022-12-13 17:00:04,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 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) [2022-12-13 17:00:04,113 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 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) [2022-12-13 17:00:04,115 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 101 flow. Second operand 9 states and 977 transitions. [2022-12-13 17:00:04,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 167 transitions, 742 flow [2022-12-13 17:00:04,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 167 transitions, 692 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 17:00:04,144 INFO L231 Difference]: Finished difference. Result has 56 places, 63 transitions, 225 flow [2022-12-13 17:00:04,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=225, PETRI_PLACES=56, PETRI_TRANSITIONS=63} [2022-12-13 17:00:04,150 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2022-12-13 17:00:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 63 transitions, 225 flow [2022-12-13 17:00:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 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) [2022-12-13 17:00:04,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:04,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:04,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:00:04,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash 393732193, now seen corresponding path program 1 times [2022-12-13 17:00:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290516025] [2022-12-13 17:00:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:04,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:04,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290516025] [2022-12-13 17:00:04,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290516025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:04,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:04,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:00:04,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730656012] [2022-12-13 17:00:04,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:04,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:00:04,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:00:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:00:04,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-12-13 17:00:04,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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) [2022-12-13 17:00:04,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:04,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-12-13 17:00:04,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:04,906 INFO L130 PetriNetUnfolder]: 4890/8282 cut-off events. [2022-12-13 17:00:04,906 INFO L131 PetriNetUnfolder]: For 2191/2457 co-relation queries the response was YES. [2022-12-13 17:00:04,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18654 conditions, 8282 events. 4890/8282 cut-off events. For 2191/2457 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 63487 event pairs, 1301 based on Foata normal form. 901/8700 useless extension candidates. Maximal degree in co-relation 14266. Up to 3355 conditions per place. [2022-12-13 17:00:04,946 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 46 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2022-12-13 17:00:04,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 386 flow [2022-12-13 17:00:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:00:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:00:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2022-12-13 17:00:04,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6312849162011173 [2022-12-13 17:00:04,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2022-12-13 17:00:04,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2022-12-13 17:00:04,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:04,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2022-12-13 17:00:04,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2022-12-13 17:00:04,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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) [2022-12-13 17:00:04,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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) [2022-12-13 17:00:04,950 INFO L175 Difference]: Start difference. First operand has 56 places, 63 transitions, 225 flow. Second operand 3 states and 339 transitions. [2022-12-13 17:00:04,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 386 flow [2022-12-13 17:00:04,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:00:04,965 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 241 flow [2022-12-13 17:00:04,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2022-12-13 17:00:04,965 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2022-12-13 17:00:04,965 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 241 flow [2022-12-13 17:00:04,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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) [2022-12-13 17:00:04,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:04,966 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:04,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:00:04,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:04,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1059765865, now seen corresponding path program 2 times [2022-12-13 17:00:04,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:04,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70024613] [2022-12-13 17:00:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:05,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70024613] [2022-12-13 17:00:05,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70024613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:05,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:05,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:00:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892875435] [2022-12-13 17:00:05,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:05,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:00:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:00:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:00:05,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-12-13 17:00:05,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 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) [2022-12-13 17:00:05,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:05,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-12-13 17:00:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:05,420 INFO L130 PetriNetUnfolder]: 1753/3813 cut-off events. [2022-12-13 17:00:05,420 INFO L131 PetriNetUnfolder]: For 2859/2950 co-relation queries the response was YES. [2022-12-13 17:00:05,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9048 conditions, 3813 events. 1753/3813 cut-off events. For 2859/2950 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31475 event pairs, 454 based on Foata normal form. 379/4029 useless extension candidates. Maximal degree in co-relation 7789. Up to 1194 conditions per place. [2022-12-13 17:00:05,430 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 55 selfloop transitions, 7 changer transitions 14/109 dead transitions. [2022-12-13 17:00:05,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 543 flow [2022-12-13 17:00:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:00:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:00:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2022-12-13 17:00:05,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6410614525139665 [2022-12-13 17:00:05,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2022-12-13 17:00:05,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2022-12-13 17:00:05,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:05,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2022-12-13 17:00:05,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 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) [2022-12-13 17:00:05,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2022-12-13 17:00:05,434 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2022-12-13 17:00:05,434 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 241 flow. Second operand 4 states and 459 transitions. [2022-12-13 17:00:05,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 543 flow [2022-12-13 17:00:05,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 109 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:00:05,440 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 283 flow [2022-12-13 17:00:05,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2022-12-13 17:00:05,440 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2022-12-13 17:00:05,440 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 283 flow [2022-12-13 17:00:05,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 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) [2022-12-13 17:00:05,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:05,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:05,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:00:05,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 307224848, now seen corresponding path program 1 times [2022-12-13 17:00:05,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:05,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427283506] [2022-12-13 17:00:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:05,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:05,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427283506] [2022-12-13 17:00:05,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427283506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:05,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:05,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:00:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745229160] [2022-12-13 17:00:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:00:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:00:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:00:05,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 179 [2022-12-13 17:00:05,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 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) [2022-12-13 17:00:05,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:05,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 179 [2022-12-13 17:00:05,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:06,010 INFO L130 PetriNetUnfolder]: 2780/5515 cut-off events. [2022-12-13 17:00:06,010 INFO L131 PetriNetUnfolder]: For 4908/5082 co-relation queries the response was YES. [2022-12-13 17:00:06,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15115 conditions, 5515 events. 2780/5515 cut-off events. For 4908/5082 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42593 event pairs, 487 based on Foata normal form. 418/5899 useless extension candidates. Maximal degree in co-relation 13644. Up to 2225 conditions per place. [2022-12-13 17:00:06,026 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 132 selfloop transitions, 43 changer transitions 28/210 dead transitions. [2022-12-13 17:00:06,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 210 transitions, 1298 flow [2022-12-13 17:00:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:00:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:00:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 967 transitions. [2022-12-13 17:00:06,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6002482929857231 [2022-12-13 17:00:06,028 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 967 transitions. [2022-12-13 17:00:06,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 967 transitions. [2022-12-13 17:00:06,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:06,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 967 transitions. [2022-12-13 17:00:06,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 107.44444444444444) internal successors, (967), 9 states have internal predecessors, (967), 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) [2022-12-13 17:00:06,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 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) [2022-12-13 17:00:06,032 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 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) [2022-12-13 17:00:06,033 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 283 flow. Second operand 9 states and 967 transitions. [2022-12-13 17:00:06,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 210 transitions, 1298 flow [2022-12-13 17:00:06,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 210 transitions, 1282 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-12-13 17:00:06,042 INFO L231 Difference]: Finished difference. Result has 77 places, 98 transitions, 588 flow [2022-12-13 17:00:06,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=588, PETRI_PLACES=77, PETRI_TRANSITIONS=98} [2022-12-13 17:00:06,043 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2022-12-13 17:00:06,043 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 98 transitions, 588 flow [2022-12-13 17:00:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 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) [2022-12-13 17:00:06,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:06,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:00:06,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1352750556, now seen corresponding path program 1 times [2022-12-13 17:00:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038861405] [2022-12-13 17:00:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038861405] [2022-12-13 17:00:06,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038861405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:06,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:06,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:00:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320557111] [2022-12-13 17:00:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:00:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:00:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:00:06,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 179 [2022-12-13 17:00:06,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:06,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:06,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 179 [2022-12-13 17:00:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:06,638 INFO L130 PetriNetUnfolder]: 2607/5317 cut-off events. [2022-12-13 17:00:06,638 INFO L131 PetriNetUnfolder]: For 7603/7691 co-relation queries the response was YES. [2022-12-13 17:00:06,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17044 conditions, 5317 events. 2607/5317 cut-off events. For 7603/7691 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 41653 event pairs, 670 based on Foata normal form. 134/5424 useless extension candidates. Maximal degree in co-relation 16138. Up to 2699 conditions per place. [2022-12-13 17:00:06,656 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 116 selfloop transitions, 47 changer transitions 20/190 dead transitions. [2022-12-13 17:00:06,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 190 transitions, 1358 flow [2022-12-13 17:00:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:00:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:00:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 760 transitions. [2022-12-13 17:00:06,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6065442936951316 [2022-12-13 17:00:06,658 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 760 transitions. [2022-12-13 17:00:06,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 760 transitions. [2022-12-13 17:00:06,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:06,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 760 transitions. [2022-12-13 17:00:06,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 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) [2022-12-13 17:00:06,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2022-12-13 17:00:06,661 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2022-12-13 17:00:06,661 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 588 flow. Second operand 7 states and 760 transitions. [2022-12-13 17:00:06,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 190 transitions, 1358 flow [2022-12-13 17:00:06,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 190 transitions, 1356 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 17:00:06,706 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 754 flow [2022-12-13 17:00:06,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=754, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2022-12-13 17:00:06,706 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2022-12-13 17:00:06,707 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 754 flow [2022-12-13 17:00:06,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:06,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:06,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:06,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:00:06,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -924220967, now seen corresponding path program 1 times [2022-12-13 17:00:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:06,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144810194] [2022-12-13 17:00:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:06,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144810194] [2022-12-13 17:00:06,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144810194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:06,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:06,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:00:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356087164] [2022-12-13 17:00:06,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:06,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:00:06,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:00:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:00:06,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 179 [2022-12-13 17:00:06,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 754 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:06,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:06,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 179 [2022-12-13 17:00:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:07,510 INFO L130 PetriNetUnfolder]: 2572/5243 cut-off events. [2022-12-13 17:00:07,510 INFO L131 PetriNetUnfolder]: For 9616/9755 co-relation queries the response was YES. [2022-12-13 17:00:07,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17722 conditions, 5243 events. 2572/5243 cut-off events. For 9616/9755 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40908 event pairs, 712 based on Foata normal form. 189/5368 useless extension candidates. Maximal degree in co-relation 16651. Up to 2765 conditions per place. [2022-12-13 17:00:07,533 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 124 selfloop transitions, 49 changer transitions 13/195 dead transitions. [2022-12-13 17:00:07,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 195 transitions, 1533 flow [2022-12-13 17:00:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:00:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:00:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 755 transitions. [2022-12-13 17:00:07,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6025538707102953 [2022-12-13 17:00:07,535 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 755 transitions. [2022-12-13 17:00:07,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 755 transitions. [2022-12-13 17:00:07,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:07,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 755 transitions. [2022-12-13 17:00:07,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 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) [2022-12-13 17:00:07,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2022-12-13 17:00:07,539 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2022-12-13 17:00:07,539 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 754 flow. Second operand 7 states and 755 transitions. [2022-12-13 17:00:07,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 195 transitions, 1533 flow [2022-12-13 17:00:07,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 195 transitions, 1512 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:00:07,579 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 908 flow [2022-12-13 17:00:07,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=908, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2022-12-13 17:00:07,580 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 40 predicate places. [2022-12-13 17:00:07,580 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 908 flow [2022-12-13 17:00:07,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:07,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:07,580 INFO L209 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] [2022-12-13 17:00:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:00:07,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 17:00:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1449164372, now seen corresponding path program 1 times [2022-12-13 17:00:07,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:07,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692912656] [2022-12-13 17:00:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:00:07,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:00:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:00:07,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:00:07,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:00:07,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-12-13 17:00:07,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 17:00:07,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-12-13 17:00:07,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-12-13 17:00:07,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-12-13 17:00:07,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-12-13 17:00:07,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 17:00:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:00:07,627 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-12-13 17:00:07,632 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 17:00:07,632 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:00:07,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:00:07 BasicIcfg [2022-12-13 17:00:07,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:00:07,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:00:07,662 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:00:07,662 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:00:07,662 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:00:00" (3/4) ... [2022-12-13 17:00:07,664 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 17:00:07,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 17:00:07,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:00:07,707 INFO L158 Benchmark]: Toolchain (without parser) took 8186.89ms. Allocated memory was 132.1MB in the beginning and 828.4MB in the end (delta: 696.3MB). Free memory was 100.4MB in the beginning and 326.3MB in the end (delta: -225.9MB). Peak memory consumption was 473.0MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,707 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 132.1MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:00:07,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.42ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 78.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.61ms. Allocated memory is still 132.1MB. Free memory was 78.4MB in the beginning and 76.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,708 INFO L158 Benchmark]: Boogie Preprocessor took 24.79ms. Allocated memory is still 132.1MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:00:07,709 INFO L158 Benchmark]: RCFGBuilder took 332.05ms. Allocated memory is still 132.1MB. Free memory was 74.7MB in the beginning and 58.5MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,709 INFO L158 Benchmark]: TraceAbstraction took 7396.22ms. Allocated memory was 132.1MB in the beginning and 828.4MB in the end (delta: 696.3MB). Free memory was 58.0MB in the beginning and 334.7MB in the end (delta: -276.7MB). Peak memory consumption was 422.7MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,709 INFO L158 Benchmark]: Witness Printer took 44.38ms. Allocated memory is still 828.4MB. Free memory was 334.7MB in the beginning and 326.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 17:00:07,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 132.1MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.42ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 78.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.61ms. Allocated memory is still 132.1MB. Free memory was 78.4MB in the beginning and 76.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.79ms. Allocated memory is still 132.1MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 332.05ms. Allocated memory is still 132.1MB. Free memory was 74.7MB in the beginning and 58.5MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7396.22ms. Allocated memory was 132.1MB in the beginning and 828.4MB in the end (delta: 696.3MB). Free memory was 58.0MB in the beginning and 334.7MB in the end (delta: -276.7MB). Peak memory consumption was 422.7MB. Max. memory is 16.1GB. * Witness Printer took 44.38ms. Allocated memory is still 828.4MB. Free memory was 334.7MB in the beginning and 326.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 107 PlacesBefore, 52 PlacesAfterwards, 96 TransitionsBefore, 40 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 6 FixpointIterations, 22 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 65 TotalNumberOfCompositions, 9477 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4724, independent: 4457, independent conditional: 0, independent unconditional: 4457, dependent: 267, dependent conditional: 0, dependent unconditional: 267, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1382, independent: 1346, independent conditional: 0, independent unconditional: 1346, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4724, independent: 3111, independent conditional: 0, independent unconditional: 3111, dependent: 231, dependent conditional: 0, dependent unconditional: 231, unknown: 1382, unknown conditional: 0, unknown unconditional: 1382] , Statistics on independence cache: Total cache size (in pairs): 300, Positive cache size: 278, Positive conditional cache size: 0, Positive unconditional cache size: 278, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-2, r=0, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-1, r=0, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=0, r=1, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=1, r=1, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l [L745] 2 return 0; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 139 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.2s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 636 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 547 mSDsluCounter, 152 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 82 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1402 IncrementalHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 70 mSDtfsCounter, 1402 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=908occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 112 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 17:00:07,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27541289-9eb5-4c7f-a8a7-df5ac6d6d2e2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE