./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R --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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:30:40,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:30:40,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:30:40,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:30:40,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:30:40,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:30:40,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:30:40,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:30:40,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:30:40,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:30:40,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:30:40,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:30:40,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:30:40,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:30:40,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:30:40,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:30:40,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:30:40,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:30:40,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:30:40,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:30:40,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:30:40,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:30:40,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:30:40,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:30:40,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:30:40,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:30:40,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:30:40,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:30:40,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:30:40,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:30:40,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:30:40,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:30:40,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:30:40,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:30:40,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:30:40,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:30:40,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:30:40,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:30:40,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:30:40,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:30:40,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:30:40,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:30:40,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:30:40,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:30:40,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:30:40,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:30:40,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:30:40,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:30:40,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:30:40,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:30:40,664 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:30:40,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:30:40,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:30:40,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:30:40,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:30:40,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:30:40,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:30:40,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:30:40,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:30:40,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:30:40,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:30:40,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:30:40,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:30:40,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:30:40,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:30:40,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:30:40,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:30:40,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:30:40,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:30:40,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:30:40,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:30:40,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:30:40,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:30:40,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:30:40,669 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:30:40,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:30:40,669 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_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2022-11-25 17:30:40,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:30:40,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:30:40,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:30:40,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:30:40,986 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:30:40,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-25 17:30:44,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:30:44,440 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:30:44,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-25 17:30:44,460 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/data/5b60f6fca/249f88602cb34c37a8b952e739a95330/FLAGaa428035e [2022-11-25 17:30:44,479 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/data/5b60f6fca/249f88602cb34c37a8b952e739a95330 [2022-11-25 17:30:44,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:30:44,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:30:44,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:44,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:30:44,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:30:44,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:44" (1/1) ... [2022-11-25 17:30:44,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4088b199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:44, skipping insertion in model container [2022-11-25 17:30:44,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:44" (1/1) ... [2022-11-25 17:30:44,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:30:44,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:30:44,825 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:30:45,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,037 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_aa02adcd-6415-4bce-ab89-781dc8d2be5c/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-25 17:30:45,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:45,063 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:30:45,077 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:30:45,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,095 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_aa02adcd-6415-4bce-ab89-781dc8d2be5c/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-25 17:30:45,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:45,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:45,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:45,165 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:30:45,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45 WrapperNode [2022-11-25 17:30:45,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:45,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:30:45,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:30:45,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:30:45,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,257 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-11-25 17:30:45,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:30:45,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:30:45,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:30:45,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:30:45,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:30:45,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:30:45,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:30:45,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:30:45,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (1/1) ... [2022-11-25 17:30:45,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:30:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:45,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:30:45,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa02adcd-6415-4bce-ab89-781dc8d2be5c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:30:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:30:45,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:30:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:30:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:30:45,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:30:45,383 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:30:45,496 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:30:45,498 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:30:45,598 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:30:45,619 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:30:45,633 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:30:45,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:30:45 BoogieIcfgContainer [2022-11-25 17:30:45,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:30:45,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:30:45,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:30:45,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:30:45,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:30:44" (1/3) ... [2022-11-25 17:30:45,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d564fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:30:45, skipping insertion in model container [2022-11-25 17:30:45,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:45" (2/3) ... [2022-11-25 17:30:45,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d564fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:30:45, skipping insertion in model container [2022-11-25 17:30:45,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:30:45" (3/3) ... [2022-11-25 17:30:45,663 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2022-11-25 17:30:45,672 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:30:45,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:30:45,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:30:45,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:30:45,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,911 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-11-25 17:30:45,911 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-25 17:30:45,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,928 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:45,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 79 flow [2022-11-25 17:30:45,988 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-11-25 17:30:45,988 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-25 17:30:45,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 196 [2022-11-25 17:30:47,201 INFO L134 LiptonReduction]: Checked pairs total: 163 [2022-11-25 17:30:47,201 INFO L136 LiptonReduction]: Total number of compositions: 31 [2022-11-25 17:30:47,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:47,248 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:47,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:30:47,254 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2022-11-25 17:30:47,254 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:47,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:47,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:47,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:30:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash 5039910, now seen corresponding path program 1 times [2022-11-25 17:30:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673343662] [2022-11-25 17:30:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:47,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673343662] [2022-11-25 17:30:47,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673343662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:47,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:47,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580173010] [2022-11-25 17:30:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:47,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 68 [2022-11-25 17:30:47,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:47,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:47,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 68 [2022-11-25 17:30:47,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:47,708 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 17:30:47,708 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:47,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2022-11-25 17:30:47,711 INFO L137 encePairwiseOnDemand]: 64/68 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2022-11-25 17:30:47,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2022-11-25 17:30:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2022-11-25 17:30:47,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2022-11-25 17:30:47,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2022-11-25 17:30:47,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2022-11-25 17:30:47,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:47,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2022-11-25 17:30:47,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:47,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:47,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:47,754 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 3 states and 100 transitions. [2022-11-25 17:30:47,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2022-11-25 17:30:47,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:47,760 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 21 flow [2022-11-25 17:30:47,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2022-11-25 17:30:47,771 INFO L288 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2022-11-25 17:30:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 21 flow [2022-11-25 17:30:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:47,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:47,773 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:30:47,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:30:47,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:30:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 548392144, now seen corresponding path program 1 times [2022-11-25 17:30:47,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090807158] [2022-11-25 17:30:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:47,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:30:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:47,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:30:47,878 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:30:47,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 17:30:47,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 17:30:47,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 17:30:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:30:47,884 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:30:47,887 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:30:47,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:30:47,901 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:47,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,924 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2022-11-25 17:30:47,925 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:30:47,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 3/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2022-11-25 17:30:47,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,931 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:47,932 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 45 transitions, 102 flow [2022-11-25 17:30:47,947 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2022-11-25 17:30:47,947 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:30:47,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 3/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2022-11-25 17:30:47,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2022-11-25 17:30:49,063 INFO L134 LiptonReduction]: Checked pairs total: 1031 [2022-11-25 17:30:49,063 INFO L136 LiptonReduction]: Total number of compositions: 32 [2022-11-25 17:30:49,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:49,067 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:49,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:30:49,069 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 17:30:49,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:49,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:49,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:49,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:30:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash 7657444, now seen corresponding path program 1 times [2022-11-25 17:30:49,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:49,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061568116] [2022-11-25 17:30:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:49,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061568116] [2022-11-25 17:30:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061568116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:49,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:49,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513492260] [2022-11-25 17:30:49,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:49,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:49,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 77 [2022-11-25 17:30:49,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:49,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 77 [2022-11-25 17:30:49,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:49,281 INFO L130 PetriNetUnfolder]: 22/66 cut-off events. [2022-11-25 17:30:49,282 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 17:30:49,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 66 events. 22/66 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 210 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 32 conditions per place. [2022-11-25 17:30:49,283 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 13 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-11-25 17:30:49,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 91 flow [2022-11-25 17:30:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2022-11-25 17:30:49,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2022-11-25 17:30:49,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2022-11-25 17:30:49,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2022-11-25 17:30:49,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:49,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2022-11-25 17:30:49,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,289 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 122 transitions. [2022-11-25 17:30:49,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 91 flow [2022-11-25 17:30:49,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 89 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:49,290 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 61 flow [2022-11-25 17:30:49,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-11-25 17:30:49,291 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2022-11-25 17:30:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 61 flow [2022-11-25 17:30:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:49,292 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:30:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:30:49,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:30:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 501792796, now seen corresponding path program 1 times [2022-11-25 17:30:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:49,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12287686] [2022-11-25 17:30:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:49,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:30:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:49,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:30:49,320 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:30:49,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 17:30:49,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 17:30:49,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 17:30:49,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 17:30:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:30:49,321 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:30:49,322 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:30:49,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:30:49,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,351 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-25 17:30:49,351 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:30:49,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 90 events. 4/90 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 73. Up to 8 conditions per place. [2022-11-25 17:30:49,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,354 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:49,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 53 transitions, 127 flow [2022-11-25 17:30:49,367 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-25 17:30:49,367 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:30:49,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 90 events. 4/90 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 73. Up to 8 conditions per place. [2022-11-25 17:30:49,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 924 [2022-11-25 17:30:50,579 INFO L134 LiptonReduction]: Checked pairs total: 2148 [2022-11-25 17:30:50,580 INFO L136 LiptonReduction]: Total number of compositions: 36 [2022-11-25 17:30:50,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:50,583 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:50,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:30:50,586 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-11-25 17:30:50,586 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:50,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:50,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:50,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:30:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 10644300, now seen corresponding path program 1 times [2022-11-25 17:30:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379685656] [2022-11-25 17:30:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:50,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379685656] [2022-11-25 17:30:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379685656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:50,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:50,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471984929] [2022-11-25 17:30:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:50,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 89 [2022-11-25 17:30:50,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:50,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 89 [2022-11-25 17:30:50,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:50,726 INFO L130 PetriNetUnfolder]: 162/314 cut-off events. [2022-11-25 17:30:50,726 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-11-25 17:30:50,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 314 events. 162/314 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1398 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 139. Up to 226 conditions per place. [2022-11-25 17:30:50,730 INFO L137 encePairwiseOnDemand]: 81/89 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2022-11-25 17:30:50,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 137 flow [2022-11-25 17:30:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2022-11-25 17:30:50,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5318352059925093 [2022-11-25 17:30:50,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2022-11-25 17:30:50,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2022-11-25 17:30:50,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:50,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2022-11-25 17:30:50,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,736 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 63 flow. Second operand 3 states and 142 transitions. [2022-11-25 17:30:50,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 137 flow [2022-11-25 17:30:50,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 129 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:50,738 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 85 flow [2022-11-25 17:30:50,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2022-11-25 17:30:50,739 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2022-11-25 17:30:50,739 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 85 flow [2022-11-25 17:30:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:50,740 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:30:50,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:30:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash 283786792, now seen corresponding path program 1 times [2022-11-25 17:30:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:50,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882693664] [2022-11-25 17:30:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:30:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:50,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882693664] [2022-11-25 17:30:50,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882693664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:50,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:50,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:30:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764537548] [2022-11-25 17:30:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:50,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:50,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:50,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 89 [2022-11-25 17:30:50,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:50,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 89 [2022-11-25 17:30:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:50,891 INFO L130 PetriNetUnfolder]: 279/467 cut-off events. [2022-11-25 17:30:50,891 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 17:30:50,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 467 events. 279/467 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 820. Up to 392 conditions per place. [2022-11-25 17:30:50,898 INFO L137 encePairwiseOnDemand]: 83/89 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2022-11-25 17:30:50,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 153 flow [2022-11-25 17:30:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2022-11-25 17:30:50,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5243445692883895 [2022-11-25 17:30:50,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2022-11-25 17:30:50,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2022-11-25 17:30:50,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:50,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2022-11-25 17:30:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,908 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 85 flow. Second operand 3 states and 140 transitions. [2022-11-25 17:30:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 153 flow [2022-11-25 17:30:50,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:50,913 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 90 flow [2022-11-25 17:30:50,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2022-11-25 17:30:50,917 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2022-11-25 17:30:50,917 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 90 flow [2022-11-25 17:30:50,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:50,918 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:30:50,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:30:50,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:30:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1022789477, now seen corresponding path program 1 times [2022-11-25 17:30:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:50,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647912909] [2022-11-25 17:30:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:50,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:30:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:50,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:30:50,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:30:50,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:30:50,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:30:50,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:30:50,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:30:50,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:30:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:30:50,993 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:30:50,993 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:30:50,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:30:51,009 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:51,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,022 INFO L130 PetriNetUnfolder]: 5/111 cut-off events. [2022-11-25 17:30:51,022 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:30:51,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 111 events. 5/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 154 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2022-11-25 17:30:51,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,024 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:51,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,036 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 154 flow [2022-11-25 17:30:51,052 INFO L130 PetriNetUnfolder]: 5/111 cut-off events. [2022-11-25 17:30:51,052 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:30:51,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 111 events. 5/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 154 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2022-11-25 17:30:51,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2022-11-25 17:30:52,309 INFO L134 LiptonReduction]: Checked pairs total: 3522 [2022-11-25 17:30:52,310 INFO L136 LiptonReduction]: Total number of compositions: 40 [2022-11-25 17:30:52,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:52,312 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:52,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:30:52,314 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-11-25 17:30:52,314 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:52,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:52,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:52,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:30:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash 13999587, now seen corresponding path program 1 times [2022-11-25 17:30:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938588786] [2022-11-25 17:30:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:52,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938588786] [2022-11-25 17:30:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938588786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:52,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:52,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500405219] [2022-11-25 17:30:52,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:52,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 101 [2022-11-25 17:30:52,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:52,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 101 [2022-11-25 17:30:52,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:52,603 INFO L130 PetriNetUnfolder]: 1032/1602 cut-off events. [2022-11-25 17:30:52,603 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2022-11-25 17:30:52,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1602 events. 1032/1602 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8244 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 682. Up to 1390 conditions per place. [2022-11-25 17:30:52,618 INFO L137 encePairwiseOnDemand]: 91/101 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2022-11-25 17:30:52,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 187 flow [2022-11-25 17:30:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2022-11-25 17:30:52,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5346534653465347 [2022-11-25 17:30:52,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2022-11-25 17:30:52,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2022-11-25 17:30:52,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:52,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2022-11-25 17:30:52,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,627 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 3 states and 162 transitions. [2022-11-25 17:30:52,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 187 flow [2022-11-25 17:30:52,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:52,630 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 109 flow [2022-11-25 17:30:52,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2022-11-25 17:30:52,632 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2022-11-25 17:30:52,633 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 109 flow [2022-11-25 17:30:52,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:52,633 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:30:52,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:30:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -598661158, now seen corresponding path program 1 times [2022-11-25 17:30:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:52,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497951337] [2022-11-25 17:30:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:52,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497951337] [2022-11-25 17:30:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497951337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:52,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:52,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:30:52,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256947742] [2022-11-25 17:30:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:52,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:52,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:52,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 101 [2022-11-25 17:30:52,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:52,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 101 [2022-11-25 17:30:52,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:53,007 INFO L130 PetriNetUnfolder]: 1623/2343 cut-off events. [2022-11-25 17:30:53,007 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2022-11-25 17:30:53,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2343 events. 1623/2343 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11370 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 4274. Up to 2160 conditions per place. [2022-11-25 17:30:53,025 INFO L137 encePairwiseOnDemand]: 93/101 looper letters, 30 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2022-11-25 17:30:53,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 200 flow [2022-11-25 17:30:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2022-11-25 17:30:53,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.528052805280528 [2022-11-25 17:30:53,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2022-11-25 17:30:53,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2022-11-25 17:30:53,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:53,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2022-11-25 17:30:53,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:53,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:53,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:53,030 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 109 flow. Second operand 3 states and 160 transitions. [2022-11-25 17:30:53,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 200 flow [2022-11-25 17:30:53,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:53,032 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 116 flow [2022-11-25 17:30:53,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-11-25 17:30:53,037 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2022-11-25 17:30:53,037 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 116 flow [2022-11-25 17:30:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:53,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:53,038 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:53,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:30:53,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:30:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1613379628, now seen corresponding path program 1 times [2022-11-25 17:30:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109271524] [2022-11-25 17:30:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:53,062 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:30:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:53,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:30:53,091 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:30:53,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 17:30:53,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 17:30:53,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-25 17:30:53,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 17:30:53,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 17:30:53,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 17:30:53,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:30:53,092 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:30:53,093 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:30:53,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 17:30:53,112 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:53,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,132 INFO L130 PetriNetUnfolder]: 6/132 cut-off events. [2022-11-25 17:30:53,133 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:30:53,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 132 events. 6/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 192 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2022-11-25 17:30:53,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,135 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:53,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 69 transitions, 183 flow [2022-11-25 17:30:53,150 INFO L130 PetriNetUnfolder]: 6/132 cut-off events. [2022-11-25 17:30:53,150 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:30:53,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 132 events. 6/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 192 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2022-11-25 17:30:53,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 2100 [2022-11-25 17:30:54,573 INFO L134 LiptonReduction]: Checked pairs total: 5650 [2022-11-25 17:30:54,573 INFO L136 LiptonReduction]: Total number of compositions: 44 [2022-11-25 17:30:54,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:54,575 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:54,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:30:54,576 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 17:30:54,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:54,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:54,577 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:54,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:30:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 17723351, now seen corresponding path program 1 times [2022-11-25 17:30:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:54,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260043015] [2022-11-25 17:30:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260043015] [2022-11-25 17:30:54,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260043015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:54,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:54,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:54,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66583724] [2022-11-25 17:30:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:54,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:54,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:54,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 113 [2022-11-25 17:30:54,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:54,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:54,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 113 [2022-11-25 17:30:54,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:55,603 INFO L130 PetriNetUnfolder]: 5980/8248 cut-off events. [2022-11-25 17:30:55,604 INFO L131 PetriNetUnfolder]: For 3486/3486 co-relation queries the response was YES. [2022-11-25 17:30:55,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17869 conditions, 8248 events. 5980/8248 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45042 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 3516. Up to 7756 conditions per place. [2022-11-25 17:30:55,686 INFO L137 encePairwiseOnDemand]: 101/113 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2022-11-25 17:30:55,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 241 flow [2022-11-25 17:30:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2022-11-25 17:30:55,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5368731563421829 [2022-11-25 17:30:55,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2022-11-25 17:30:55,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2022-11-25 17:30:55,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:55,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2022-11-25 17:30:55,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:55,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:55,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:55,692 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 107 flow. Second operand 3 states and 182 transitions. [2022-11-25 17:30:55,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 241 flow [2022-11-25 17:30:55,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 209 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:55,700 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 133 flow [2022-11-25 17:30:55,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2022-11-25 17:30:55,701 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-11-25 17:30:55,701 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 133 flow [2022-11-25 17:30:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:55,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:55,701 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:30:55,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:30:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2092921678, now seen corresponding path program 1 times [2022-11-25 17:30:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:55,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34678382] [2022-11-25 17:30:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:55,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34678382] [2022-11-25 17:30:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34678382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:55,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:30:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789965770] [2022-11-25 17:30:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:55,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 113 [2022-11-25 17:30:55,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:55,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:55,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 113 [2022-11-25 17:30:55,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:57,109 INFO L130 PetriNetUnfolder]: 8535/11343 cut-off events. [2022-11-25 17:30:57,110 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2022-11-25 17:30:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27936 conditions, 11343 events. 8535/11343 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57347 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20700. Up to 10912 conditions per place. [2022-11-25 17:30:57,194 INFO L137 encePairwiseOnDemand]: 103/113 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2022-11-25 17:30:57,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 247 flow [2022-11-25 17:30:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2022-11-25 17:30:57,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5309734513274337 [2022-11-25 17:30:57,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2022-11-25 17:30:57,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2022-11-25 17:30:57,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:57,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2022-11-25 17:30:57,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:57,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:57,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:57,199 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 133 flow. Second operand 3 states and 180 transitions. [2022-11-25 17:30:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 247 flow [2022-11-25 17:30:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:57,203 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 142 flow [2022-11-25 17:30:57,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-11-25 17:30:57,205 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2022-11-25 17:30:57,205 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 142 flow [2022-11-25 17:30:57,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:57,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:57,206 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:57,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:30:57,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:30:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:57,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1727928052, now seen corresponding path program 1 times [2022-11-25 17:30:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343809162] [2022-11-25 17:30:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:57,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:57,230 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:30:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:30:57,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:30:57,254 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:30:57,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:30:57,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-25 17:30:57,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-25 17:30:57,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-25 17:30:57,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-25 17:30:57,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-25 17:30:57,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-25 17:30:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:30:57,256 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:30:57,256 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:30:57,257 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-25 17:30:57,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:30:57,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,305 INFO L130 PetriNetUnfolder]: 7/153 cut-off events. [2022-11-25 17:30:57,306 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:30:57,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 153 events. 7/153 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 222 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 151. Up to 14 conditions per place. [2022-11-25 17:30:57,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,308 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:57,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 77 transitions, 214 flow [2022-11-25 17:30:57,327 INFO L130 PetriNetUnfolder]: 7/153 cut-off events. [2022-11-25 17:30:57,327 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:30:57,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 153 events. 7/153 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 222 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 151. Up to 14 conditions per place. [2022-11-25 17:30:57,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-11-25 17:30:58,869 INFO L134 LiptonReduction]: Checked pairs total: 7637 [2022-11-25 17:30:58,869 INFO L136 LiptonReduction]: Total number of compositions: 48 [2022-11-25 17:30:58,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:58,874 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:58,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 17:30:58,875 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-11-25 17:30:58,875 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:58,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:58,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:30:58,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-25 17:30:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash 21815530, now seen corresponding path program 1 times [2022-11-25 17:30:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:58,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673468136] [2022-11-25 17:30:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:58,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673468136] [2022-11-25 17:30:58,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673468136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:58,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:58,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807459433] [2022-11-25 17:30:58,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:58,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:58,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2022-11-25 17:30:58,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:58,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:58,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2022-11-25 17:30:58,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:03,227 INFO L130 PetriNetUnfolder]: 32246/41520 cut-off events. [2022-11-25 17:31:03,227 INFO L131 PetriNetUnfolder]: For 20783/20783 co-relation queries the response was YES. [2022-11-25 17:31:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90073 conditions, 41520 events. 32246/41520 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 233476 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 18129. Up to 40404 conditions per place. [2022-11-25 17:31:03,558 INFO L137 encePairwiseOnDemand]: 111/125 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2022-11-25 17:31:03,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 299 flow [2022-11-25 17:31:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-11-25 17:31:03,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5386666666666666 [2022-11-25 17:31:03,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-11-25 17:31:03,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-11-25 17:31:03,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:03,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-11-25 17:31:03,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,563 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 132 flow. Second operand 3 states and 202 transitions. [2022-11-25 17:31:03,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 299 flow [2022-11-25 17:31:03,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 249 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-11-25 17:31:03,573 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 157 flow [2022-11-25 17:31:03,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2022-11-25 17:31:03,575 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-25 17:31:03,575 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 157 flow [2022-11-25 17:31:03,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:03,576 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:31:03,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-25 17:31:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 38964905, now seen corresponding path program 1 times [2022-11-25 17:31:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834741737] [2022-11-25 17:31:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:03,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:03,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:03,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834741737] [2022-11-25 17:31:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834741737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:03,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:03,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:31:03,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684278859] [2022-11-25 17:31:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:03,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:03,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:03,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2022-11-25 17:31:03,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:03,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2022-11-25 17:31:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:08,059 INFO L130 PetriNetUnfolder]: 42327/53407 cut-off events. [2022-11-25 17:31:08,060 INFO L131 PetriNetUnfolder]: For 13148/13148 co-relation queries the response was YES. [2022-11-25 17:31:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130277 conditions, 53407 events. 42327/53407 cut-off events. For 13148/13148 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 280492 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96838. Up to 52416 conditions per place. [2022-11-25 17:31:08,388 INFO L137 encePairwiseOnDemand]: 113/125 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2022-11-25 17:31:08,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 294 flow [2022-11-25 17:31:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2022-11-25 17:31:08,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-11-25 17:31:08,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2022-11-25 17:31:08,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2022-11-25 17:31:08,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:08,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2022-11-25 17:31:08,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,393 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 157 flow. Second operand 3 states and 200 transitions. [2022-11-25 17:31:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 294 flow [2022-11-25 17:31:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:08,408 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 168 flow [2022-11-25 17:31:08,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2022-11-25 17:31:08,410 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2022-11-25 17:31:08,410 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 168 flow [2022-11-25 17:31:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:08,411 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:08,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:31:08,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-25 17:31:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -646185040, now seen corresponding path program 1 times [2022-11-25 17:31:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102449968] [2022-11-25 17:31:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:31:08,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:31:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:31:08,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:31:08,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:31:08,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-25 17:31:08,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-25 17:31:08,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-11-25 17:31:08,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-25 17:31:08,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-25 17:31:08,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-25 17:31:08,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-25 17:31:08,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-25 17:31:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:31:08,462 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:31:08,464 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:31:08,464 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-25 17:31:08,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:31:08,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,499 INFO L130 PetriNetUnfolder]: 8/174 cut-off events. [2022-11-25 17:31:08,500 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-25 17:31:08,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 174 events. 8/174 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 270 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 180. Up to 16 conditions per place. [2022-11-25 17:31:08,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,503 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:31:08,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 85 transitions, 247 flow [2022-11-25 17:31:08,519 INFO L130 PetriNetUnfolder]: 8/174 cut-off events. [2022-11-25 17:31:08,519 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-25 17:31:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 174 events. 8/174 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 270 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 180. Up to 16 conditions per place. [2022-11-25 17:31:08,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 3724 [2022-11-25 17:31:10,129 INFO L134 LiptonReduction]: Checked pairs total: 9942 [2022-11-25 17:31:10,129 INFO L136 LiptonReduction]: Total number of compositions: 52 [2022-11-25 17:31:10,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:31:10,131 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;@87ff245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:31:10,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 17:31:10,133 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 17:31:10,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:31:10,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:10,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:31:10,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-25 17:31:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:10,134 INFO L85 PathProgramCache]: Analyzing trace with hash 26279062, now seen corresponding path program 1 times [2022-11-25 17:31:10,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740122824] [2022-11-25 17:31:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:10,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740122824] [2022-11-25 17:31:10,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740122824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:10,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:10,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:10,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275718555] [2022-11-25 17:31:10,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:10,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:10,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 137 [2022-11-25 17:31:10,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:10,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:10,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 137 [2022-11-25 17:31:10,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:29,192 INFO L130 PetriNetUnfolder]: 164558/202770 cut-off events. [2022-11-25 17:31:29,192 INFO L131 PetriNetUnfolder]: For 117491/117491 co-relation queries the response was YES. [2022-11-25 17:31:29,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439990 conditions, 202770 events. 164558/202770 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1155928 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 91161. Up to 200278 conditions per place. [2022-11-25 17:31:30,634 INFO L137 encePairwiseOnDemand]: 121/137 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2022-11-25 17:31:30,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 361 flow [2022-11-25 17:31:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-25 17:31:30,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5401459854014599 [2022-11-25 17:31:30,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-25 17:31:30,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-25 17:31:30,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:30,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-25 17:31:30,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,639 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 159 flow. Second operand 3 states and 222 transitions. [2022-11-25 17:31:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 361 flow [2022-11-25 17:31:31,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 289 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-25 17:31:31,091 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 181 flow [2022-11-25 17:31:31,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2022-11-25 17:31:31,092 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2022-11-25 17:31:31,092 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 181 flow [2022-11-25 17:31:31,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:31,093 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:31,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:31:31,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-25 17:31:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:31,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1049588866, now seen corresponding path program 1 times [2022-11-25 17:31:31,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:31,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454900333] [2022-11-25 17:31:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:31,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:31,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454900333] [2022-11-25 17:31:31,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454900333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:31,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:31,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:31:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383863189] [2022-11-25 17:31:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:31,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:31,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:31,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 137 [2022-11-25 17:31:31,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:31,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 137 [2022-11-25 17:31:31,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand