./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:07:42,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:07:42,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:07:42,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:07:42,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:07:42,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:07:42,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:07:42,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:07:42,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:07:42,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:07:42,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:07:42,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:07:42,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:07:42,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:07:42,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:07:42,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:07:42,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:07:42,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:07:42,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:07:42,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:07:42,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:07:42,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:07:42,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:07:42,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:07:42,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:07:42,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:07:42,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:07:42,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:07:42,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:07:42,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:07:42,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:07:42,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:07:42,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:07:42,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:07:42,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:07:42,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:07:42,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:07:42,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:07:42,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:07:42,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:07:42,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:07:42,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:07:42,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:07:42,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:07:42,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:07:42,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:07:42,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:07:42,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:07:42,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:07:42,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:07:42,590 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:07:42,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:07:42,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:07:42,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:07:42,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:07:42,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:07:42,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:07:42,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:07:42,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:07:42,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:07:42,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:07:42,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:07:42,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:07:42,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:07:42,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:07:42,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:07:42,594 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:07:42,595 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_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-12-13 15:07:42,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:07:42,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:07:42,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:07:42,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:07:42,822 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:07:42,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-12-13 15:07:45,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:07:45,730 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:07:45,731 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-12-13 15:07:45,743 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/data/6e32f406d/6f26cac054e54ec58a9dec59a05fbce5/FLAG7e2868f40 [2022-12-13 15:07:45,757 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/data/6e32f406d/6f26cac054e54ec58a9dec59a05fbce5 [2022-12-13 15:07:45,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:07:45,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:07:45,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:07:45,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:07:45,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:07:45,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:07:45" (1/1) ... [2022-12-13 15:07:45,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27838e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:45, skipping insertion in model container [2022-12-13 15:07:45,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:07:45" (1/1) ... [2022-12-13 15:07:45,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:07:45,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:07:45,971 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 15:07:46,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:07:46,090 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_93a1835c-1c03-488f-a084-8a7b883abaf0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-12-13 15:07:46,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:07:46,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:07:46,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:07:46,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:07:46,110 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:07:46,123 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 15:07:46,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:07:46,142 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_93a1835c-1c03-488f-a084-8a7b883abaf0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-12-13 15:07:46,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:07:46,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:07:46,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:07:46,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:07:46,175 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:07:46,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46 WrapperNode [2022-12-13 15:07:46,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:07:46,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:07:46,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:07:46,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:07:46,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,213 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2022-12-13 15:07:46,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:07:46,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:07:46,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:07:46,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:07:46,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:07:46,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:07:46,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:07:46,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:07:46,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (1/1) ... [2022-12-13 15:07:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:07:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:46,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:07:46,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a1835c-1c03-488f-a084-8a7b883abaf0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 15:07:46,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:07:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:07:46,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:07:46,294 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:07:46,405 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:07:46,407 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:07:46,528 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:07:46,560 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:07:46,560 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:07:46,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:07:46 BoogieIcfgContainer [2022-12-13 15:07:46,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:07:46,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:07:46,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:07:46,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:07:46,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:07:45" (1/3) ... [2022-12-13 15:07:46,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d401de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:07:46, skipping insertion in model container [2022-12-13 15:07:46,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:46" (2/3) ... [2022-12-13 15:07:46,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d401de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:07:46, skipping insertion in model container [2022-12-13 15:07:46,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:07:46" (3/3) ... [2022-12-13 15:07:46,568 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-12-13 15:07:46,574 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:07:46,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:07:46,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:07:46,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:07:46,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:07:46,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,696 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-12-13 15:07:46,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:46,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2022-12-13 15:07:46,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:07:46,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-12-13 15:07:46,741 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-12-13 15:07:46,741 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:46,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2022-12-13 15:07:46,743 INFO L119 LiptonReduction]: Number of co-enabled transitions 1092 [2022-12-13 15:07:48,130 INFO L134 LiptonReduction]: Checked pairs total: 877 [2022-12-13 15:07:48,130 INFO L136 LiptonReduction]: Total number of compositions: 69 [2022-12-13 15:07:48,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:07:48,145 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:07:48,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:07:48,147 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 15:07:48,147 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:48,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:48,147 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:07:48,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 10934950, now seen corresponding path program 1 times [2022-12-13 15:07:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:48,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513392985] [2022-12-13 15:07:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:48,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513392985] [2022-12-13 15:07:48,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513392985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:48,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:48,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13392841] [2022-12-13 15:07:48,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:48,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:48,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:48,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 138 [2022-12-13 15:07:48,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:48,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:48,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 138 [2022-12-13 15:07:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:48,359 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2022-12-13 15:07:48,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:48,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2022-12-13 15:07:48,360 INFO L137 encePairwiseOnDemand]: 134/138 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2022-12-13 15:07:48,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 43 flow [2022-12-13 15:07:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2022-12-13 15:07:48,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2022-12-13 15:07:48,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2022-12-13 15:07:48,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2022-12-13 15:07:48,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:48,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2022-12-13 15:07:48,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:48,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:48,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:48,380 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 3 states and 189 transitions. [2022-12-13 15:07:48,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 43 flow [2022-12-13 15:07:48,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:07:48,383 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 25 flow [2022-12-13 15:07:48,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=25, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2022-12-13 15:07:48,387 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2022-12-13 15:07:48,387 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 25 flow [2022-12-13 15:07:48,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:48,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:48,387 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:07:48,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:07:48,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1918517804, now seen corresponding path program 1 times [2022-12-13 15:07:48,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030755513] [2022-12-13 15:07:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:48,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:07:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:48,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:07:48,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:07:48,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 15:07:48,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 15:07:48,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 15:07:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:07:48,425 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 15:07:48,427 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:07:48,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:07:48,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:07:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,467 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-12-13 15:07:48,467 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:07:48,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 208 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2022-12-13 15:07:48,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,469 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:07:48,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-12-13 15:07:48,496 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-12-13 15:07:48,496 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:07:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 208 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2022-12-13 15:07:48,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 5304 [2022-12-13 15:07:49,878 INFO L134 LiptonReduction]: Checked pairs total: 6193 [2022-12-13 15:07:49,878 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-12-13 15:07:49,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:07:49,881 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:07:49,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 15:07:49,882 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 15:07:49,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:49,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:49,883 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:07:49,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:07:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash 18761591, now seen corresponding path program 1 times [2022-12-13 15:07:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:49,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560977125] [2022-12-13 15:07:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:49,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560977125] [2022-12-13 15:07:49,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560977125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:49,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277112354] [2022-12-13 15:07:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:49,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 214 [2022-12-13 15:07:49,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:49,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:49,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 214 [2022-12-13 15:07:49,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:50,002 INFO L130 PetriNetUnfolder]: 129/237 cut-off events. [2022-12-13 15:07:50,002 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 15:07:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 237 events. 129/237 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 943 event pairs, 47 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 198. Up to 125 conditions per place. [2022-12-13 15:07:50,003 INFO L137 encePairwiseOnDemand]: 208/214 looper letters, 27 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2022-12-13 15:07:50,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 33 transitions, 143 flow [2022-12-13 15:07:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-12-13 15:07:50,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48286604361370716 [2022-12-13 15:07:50,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-12-13 15:07:50,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-12-13 15:07:50,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:50,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-12-13 15:07:50,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:50,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:50,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:50,009 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 56 flow. Second operand 3 states and 310 transitions. [2022-12-13 15:07:50,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 33 transitions, 143 flow [2022-12-13 15:07:50,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 141 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 15:07:50,010 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 73 flow [2022-12-13 15:07:50,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2022-12-13 15:07:50,011 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-12-13 15:07:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 73 flow [2022-12-13 15:07:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:50,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:50,011 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 15:07:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:07:50,011 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)] === [2022-12-13 15:07:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2117076940, now seen corresponding path program 1 times [2022-12-13 15:07:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794265568] [2022-12-13 15:07:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:50,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:07:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:50,032 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:07:50,033 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:07:50,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 15:07:50,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 15:07:50,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 15:07:50,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 15:07:50,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:07:50,034 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 15:07:50,034 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:07:50,034 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 15:07:50,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:07:50,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,076 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-12-13 15:07:50,076 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:07:50,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 186 events. 10/186 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 423 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-12-13 15:07:50,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:07:50,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-12-13 15:07:50,093 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-12-13 15:07:50,093 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:07:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 186 events. 10/186 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 423 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-12-13 15:07:50,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 12636 [2022-12-13 15:07:51,867 INFO L134 LiptonReduction]: Checked pairs total: 14571 [2022-12-13 15:07:51,867 INFO L136 LiptonReduction]: Total number of compositions: 142 [2022-12-13 15:07:51,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:07:51,870 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:07:51,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 15:07:51,871 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 15:07:51,871 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:51,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:51,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:07:51,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:07:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash 28766365, now seen corresponding path program 1 times [2022-12-13 15:07:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646612159] [2022-12-13 15:07:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646612159] [2022-12-13 15:07:51,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646612159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:51,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:51,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:51,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434655325] [2022-12-13 15:07:51,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:51,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:51,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:51,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 291 [2022-12-13 15:07:51,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:51,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:51,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 291 [2022-12-13 15:07:51,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:52,118 INFO L130 PetriNetUnfolder]: 1525/2241 cut-off events. [2022-12-13 15:07:52,118 INFO L131 PetriNetUnfolder]: For 292/292 co-relation queries the response was YES. [2022-12-13 15:07:52,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 2241 events. 1525/2241 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10982 event pairs, 461 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 862. Up to 1621 conditions per place. [2022-12-13 15:07:52,127 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-12-13 15:07:52,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 215 flow [2022-12-13 15:07:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2022-12-13 15:07:52,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4856815578465063 [2022-12-13 15:07:52,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2022-12-13 15:07:52,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2022-12-13 15:07:52,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:52,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2022-12-13 15:07:52,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,132 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 3 states and 424 transitions. [2022-12-13 15:07:52,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 215 flow [2022-12-13 15:07:52,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 207 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 15:07:52,133 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 103 flow [2022-12-13 15:07:52,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2022-12-13 15:07:52,134 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-12-13 15:07:52,134 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 103 flow [2022-12-13 15:07:52,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:52,135 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:07:52,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:07:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1193952118, now seen corresponding path program 1 times [2022-12-13 15:07:52,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559077213] [2022-12-13 15:07:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:07:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:52,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559077213] [2022-12-13 15:07:52,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559077213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:52,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:52,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012835086] [2022-12-13 15:07:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:52,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 291 [2022-12-13 15:07:52,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:52,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 291 [2022-12-13 15:07:52,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:52,358 INFO L130 PetriNetUnfolder]: 1237/1837 cut-off events. [2022-12-13 15:07:52,358 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2022-12-13 15:07:52,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4108 conditions, 1837 events. 1237/1837 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8340 event pairs, 935 based on Foata normal form. 128/1929 useless extension candidates. Maximal degree in co-relation 2052. Up to 1755 conditions per place. [2022-12-13 15:07:52,365 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 25 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-12-13 15:07:52,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 143 flow [2022-12-13 15:07:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-12-13 15:07:52,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45933562428407787 [2022-12-13 15:07:52,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-12-13 15:07:52,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-12-13 15:07:52,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:52,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-12-13 15:07:52,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,369 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 103 flow. Second operand 3 states and 401 transitions. [2022-12-13 15:07:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 143 flow [2022-12-13 15:07:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:52,370 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 89 flow [2022-12-13 15:07:52,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2022-12-13 15:07:52,371 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-12-13 15:07:52,371 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 89 flow [2022-12-13 15:07:52,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:52,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:52,371 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 15:07:52,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:07:52,371 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)] === [2022-12-13 15:07:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -191755024, now seen corresponding path program 1 times [2022-12-13 15:07:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107366406] [2022-12-13 15:07:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:52,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:52,381 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:07:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:52,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:07:52,390 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:07:52,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 15:07:52,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 15:07:52,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 15:07:52,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 15:07:52,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 15:07:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:07:52,391 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 15:07:52,391 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:07:52,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 15:07:52,407 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:07:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,428 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-12-13 15:07:52,428 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:07:52,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 239 events. 13/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 194. Up to 10 conditions per place. [2022-12-13 15:07:52,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:07:52,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-12-13 15:07:52,451 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-12-13 15:07:52,451 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:07:52,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 239 events. 13/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 194. Up to 10 conditions per place. [2022-12-13 15:07:52,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 23088 [2022-12-13 15:07:54,616 INFO L134 LiptonReduction]: Checked pairs total: 26838 [2022-12-13 15:07:54,616 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-12-13 15:07:54,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:07:54,618 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:07:54,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 15:07:54,620 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 15:07:54,620 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:54,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:54,621 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:07:54,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:07:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash 41321205, now seen corresponding path program 1 times [2022-12-13 15:07:54,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:54,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103106698] [2022-12-13 15:07:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:54,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103106698] [2022-12-13 15:07:54,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103106698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:54,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:54,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993538931] [2022-12-13 15:07:54,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:54,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 372 [2022-12-13 15:07:54,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:54,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:54,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 372 [2022-12-13 15:07:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:56,113 INFO L130 PetriNetUnfolder]: 15543/20499 cut-off events. [2022-12-13 15:07:56,113 INFO L131 PetriNetUnfolder]: For 3384/3384 co-relation queries the response was YES. [2022-12-13 15:07:56,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42616 conditions, 20499 events. 15543/20499 cut-off events. For 3384/3384 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 109848 event pairs, 4221 based on Foata normal form. 0/15984 useless extension candidates. Maximal degree in co-relation 4715. Up to 17335 conditions per place. [2022-12-13 15:07:56,191 INFO L137 encePairwiseOnDemand]: 362/372 looper letters, 53 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2022-12-13 15:07:56,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 291 flow [2022-12-13 15:07:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-12-13 15:07:56,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.482078853046595 [2022-12-13 15:07:56,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-12-13 15:07:56,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-12-13 15:07:56,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:56,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-12-13 15:07:56,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,196 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 108 flow. Second operand 3 states and 538 transitions. [2022-12-13 15:07:56,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 291 flow [2022-12-13 15:07:56,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 273 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 15:07:56,201 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 133 flow [2022-12-13 15:07:56,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 15:07:56,202 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2022-12-13 15:07:56,202 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 133 flow [2022-12-13 15:07:56,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:56,202 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:56,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:07:56,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:07:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1128348620, now seen corresponding path program 1 times [2022-12-13 15:07:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:56,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81535275] [2022-12-13 15:07:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:07:56,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81535275] [2022-12-13 15:07:56,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81535275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:56,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:56,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018542712] [2022-12-13 15:07:56,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:56,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:56,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 372 [2022-12-13 15:07:56,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:56,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 372 [2022-12-13 15:07:56,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:57,218 INFO L130 PetriNetUnfolder]: 10525/14077 cut-off events. [2022-12-13 15:07:57,218 INFO L131 PetriNetUnfolder]: For 2790/2790 co-relation queries the response was YES. [2022-12-13 15:07:57,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31221 conditions, 14077 events. 10525/14077 cut-off events. For 2790/2790 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 69885 event pairs, 7967 based on Foata normal form. 1344/15217 useless extension candidates. Maximal degree in co-relation 15760. Up to 13635 conditions per place. [2022-12-13 15:07:57,274 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 33 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-12-13 15:07:57,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 185 flow [2022-12-13 15:07:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2022-12-13 15:07:57,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4551971326164875 [2022-12-13 15:07:57,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2022-12-13 15:07:57,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2022-12-13 15:07:57,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:57,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2022-12-13 15:07:57,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,280 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 133 flow. Second operand 3 states and 508 transitions. [2022-12-13 15:07:57,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 185 flow [2022-12-13 15:07:57,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:57,284 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 114 flow [2022-12-13 15:07:57,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-13 15:07:57,285 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-12-13 15:07:57,286 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 114 flow [2022-12-13 15:07:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:57,287 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:07:57,287 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)] === [2022-12-13 15:07:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1771077025, now seen corresponding path program 1 times [2022-12-13 15:07:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563214561] [2022-12-13 15:07:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:57,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:07:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:07:57,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:07:57,318 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:07:57,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 15:07:57,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 15:07:57,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 15:07:57,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 15:07:57,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 15:07:57,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 15:07:57,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:07:57,319 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 15:07:57,319 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:07:57,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 15:07:57,344 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:07:57,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,387 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-12-13 15:07:57,387 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 15:07:57,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 292 events. 16/292 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 894 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2022-12-13 15:07:57,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:07:57,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-12-13 15:07:57,430 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-12-13 15:07:57,430 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 15:07:57,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 292 events. 16/292 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 894 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2022-12-13 15:07:57,443 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2022-12-13 15:08:00,151 INFO L134 LiptonReduction]: Checked pairs total: 42300 [2022-12-13 15:08:00,151 INFO L136 LiptonReduction]: Total number of compositions: 224 [2022-12-13 15:08:00,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:08:00,153 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:08:00,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 15:08:00,154 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 15:08:00,154 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:08:00,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:00,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:08:00,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 15:08:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash 56783740, now seen corresponding path program 1 times [2022-12-13 15:08:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:00,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16495541] [2022-12-13 15:08:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:00,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16495541] [2022-12-13 15:08:00,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16495541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:00,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:00,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:08:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490230009] [2022-12-13 15:08:00,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:00,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:00,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:00,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:00,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 453 [2022-12-13 15:08:00,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:00,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 453 [2022-12-13 15:08:00,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:11,322 INFO L130 PetriNetUnfolder]: 146239/181311 cut-off events. [2022-12-13 15:08:11,322 INFO L131 PetriNetUnfolder]: For 35720/35720 co-relation queries the response was YES. [2022-12-13 15:08:11,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376753 conditions, 181311 events. 146239/181311 cut-off events. For 35720/35720 co-relation queries the response was YES. Maximal size of possible extension queue 6701. Compared 1022160 event pairs, 38427 based on Foata normal form. 0/138379 useless extension candidates. Maximal degree in co-relation 43003. Up to 165923 conditions per place. [2022-12-13 15:08:12,186 INFO L137 encePairwiseOnDemand]: 441/453 looper letters, 66 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2022-12-13 15:08:12,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 371 flow [2022-12-13 15:08:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:08:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-12-13 15:08:12,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797645327446652 [2022-12-13 15:08:12,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-12-13 15:08:12,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-12-13 15:08:12,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:12,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-12-13 15:08:12,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,194 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 137 flow. Second operand 3 states and 652 transitions. [2022-12-13 15:08:12,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 371 flow [2022-12-13 15:08:12,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 339 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-12-13 15:08:12,227 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 163 flow [2022-12-13 15:08:12,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2022-12-13 15:08:12,227 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2022-12-13 15:08:12,227 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 163 flow [2022-12-13 15:08:12,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:12,228 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:08:12,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 15:08:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -981460066, now seen corresponding path program 1 times [2022-12-13 15:08:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:12,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327818015] [2022-12-13 15:08:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:12,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:08:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327818015] [2022-12-13 15:08:12,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327818015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:12,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:12,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:12,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403811982] [2022-12-13 15:08:12,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:12,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:12,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 453 [2022-12-13 15:08:12,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:12,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 453 [2022-12-13 15:08:12,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:19,077 INFO L130 PetriNetUnfolder]: 81805/102893 cut-off events. [2022-12-13 15:08:19,077 INFO L131 PetriNetUnfolder]: For 21702/21702 co-relation queries the response was YES. [2022-12-13 15:08:19,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226854 conditions, 102893 events. 81805/102893 cut-off events. For 21702/21702 co-relation queries the response was YES. Maximal size of possible extension queue 3167. Compared 541954 event pairs, 62095 based on Foata normal form. 11744/113473 useless extension candidates. Maximal degree in co-relation 114504. Up to 100467 conditions per place. [2022-12-13 15:08:19,522 INFO L137 encePairwiseOnDemand]: 447/453 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 15:08:19,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 227 flow [2022-12-13 15:08:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:08:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2022-12-13 15:08:19,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45253863134657835 [2022-12-13 15:08:19,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2022-12-13 15:08:19,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2022-12-13 15:08:19,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:19,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2022-12-13 15:08:19,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:19,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:19,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:19,527 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 163 flow. Second operand 3 states and 615 transitions. [2022-12-13 15:08:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 227 flow [2022-12-13 15:08:19,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:08:19,533 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 139 flow [2022-12-13 15:08:19,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2022-12-13 15:08:19,534 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2022-12-13 15:08:19,534 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 139 flow [2022-12-13 15:08:19,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:19,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:19,534 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:19,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:08:19,535 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)] === [2022-12-13 15:08:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 759737248, now seen corresponding path program 1 times [2022-12-13 15:08:19,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746335114] [2022-12-13 15:08:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:19,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:08:19,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:08:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:08:19,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:08:19,563 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 15:08:19,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 15:08:19,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 15:08:19,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:08:19,564 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 15:08:19,564 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:08:19,564 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-13 15:08:19,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:08:19,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,638 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-12-13 15:08:19,638 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 15:08:19,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 345 events. 19/345 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1134 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 311. Up to 14 conditions per place. [2022-12-13 15:08:19,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:08:19,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,645 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-12-13 15:08:19,702 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-12-13 15:08:19,702 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 15:08:19,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 345 events. 19/345 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1134 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 311. Up to 14 conditions per place. [2022-12-13 15:08:19,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2022-12-13 15:08:22,878 INFO L134 LiptonReduction]: Checked pairs total: 60739 [2022-12-13 15:08:22,878 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-12-13 15:08:22,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:08:22,880 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;@6ec62e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:08:22,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 15:08:22,881 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 15:08:22,881 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:08:22,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:22,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 15:08:22,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 15:08:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 73666359, now seen corresponding path program 1 times [2022-12-13 15:08:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236832681] [2022-12-13 15:08:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:22,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236832681] [2022-12-13 15:08:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236832681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:22,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:08:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943644533] [2022-12-13 15:08:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:22,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 528 [2022-12-13 15:08:22,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:22,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:22,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 528 [2022-12-13 15:08:22,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:09,528 INFO L130 PetriNetUnfolder]: 1303053/1553181 cut-off events. [2022-12-13 15:10:09,528 INFO L131 PetriNetUnfolder]: For 355810/355810 co-relation queries the response was YES. [2022-12-13 15:10:12,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225484 conditions, 1553181 events. 1303053/1553181 cut-off events. For 355810/355810 co-relation queries the response was YES. Maximal size of possible extension queue 44456. Compared 8952212 event pairs, 345987 based on Foata normal form. 0/1168069 useless extension candidates. Maximal degree in co-relation 379363. Up to 1480705 conditions per place. [2022-12-13 15:10:17,819 INFO L137 encePairwiseOnDemand]: 514/528 looper letters, 79 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2022-12-13 15:10:17,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 455 flow [2022-12-13 15:10:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2022-12-13 15:10:17,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48358585858585856 [2022-12-13 15:10:17,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2022-12-13 15:10:17,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2022-12-13 15:10:17,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:17,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2022-12-13 15:10:17,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:17,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 528.0) internal successors, (2112), 4 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:17,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 528.0) internal successors, (2112), 4 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:17,828 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 168 flow. Second operand 3 states and 766 transitions. [2022-12-13 15:10:17,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 455 flow [2022-12-13 15:10:18,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 405 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 15:10:18,236 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 193 flow [2022-12-13 15:10:18,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=528, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-12-13 15:10:18,236 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2022-12-13 15:10:18,236 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 193 flow [2022-12-13 15:10:18,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:18,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:18,237 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:18,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:10:18,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 15:10:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1807474016, now seen corresponding path program 1 times [2022-12-13 15:10:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:18,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730838535] [2022-12-13 15:10:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:10:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730838535] [2022-12-13 15:10:18,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730838535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:18,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:18,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:10:18,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462876087] [2022-12-13 15:10:18,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:18,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:18,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 528 [2022-12-13 15:10:18,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:18,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:18,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 528 [2022-12-13 15:10:18,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand