./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-queue-add-3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-queue-add-3.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 11:03:25,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:03:25,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:03:25,813 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:03:25,813 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:03:25,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:03:25,826 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:03:25,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:03:25,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:03:25,827 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:03:25,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:03:25,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:03:25,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:03:25,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:03:25,829 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:03:25,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:03:25,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:03:25,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:03:25,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:03:25,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:03:25,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:03:25,831 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:03:25,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:03:25,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:03:25,832 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:03:25,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:03:25,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:03:25,833 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:03:25,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:03:25,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:03:25,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:03:25,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:03:25,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:03:25,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:03:25,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:03:25,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:03:25,836 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:03:25,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:03:25,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:03:25,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:03:25,837 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:03:25,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:03:25,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:03:25,838 INFO L153 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:03:26,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:03:26,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:03:26,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:03:26,063 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:03:26,063 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:03:26,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-queue-add-3.wvr.yml/witness.yml [2024-05-12 11:03:26,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:03:26,158 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:03:26,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-05-12 11:03:27,137 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:03:27,323 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:03:27,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-05-12 11:03:27,329 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2104ec4a/81ed9d0bef844bab82cc256185c137e9/FLAGa564bf257 [2024-05-12 11:03:27,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2104ec4a/81ed9d0bef844bab82cc256185c137e9 [2024-05-12 11:03:27,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:03:27,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:03:27,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:03:27,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:03:27,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:03:27,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:03:26" (1/2) ... [2024-05-12 11:03:27,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559a4e8e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:03:27, skipping insertion in model container [2024-05-12 11:03:27,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:03:26" (1/2) ... [2024-05-12 11:03:27,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78499f5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:03:27, skipping insertion in model container [2024-05-12 11:03:27,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:03:27" (2/2) ... [2024-05-12 11:03:27,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559a4e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27, skipping insertion in model container [2024-05-12 11:03:27,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:03:27" (2/2) ... [2024-05-12 11:03:27,357 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:03:27,372 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:03:27,373 INFO L97 edCorrectnessWitness]: Location invariant before [L119-L119] ! multithreaded || (((((((((((((((((((((((((((((((((4294967296LL + (long long )q1_front) + (long long )q2_front >= 0LL && (4294967296LL + (long long )q1_front) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )q2_back) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )n1) + (long long )n2 >= 0LL) && (4294967296LL + (long long )n2) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )n1 >= 0LL) && (4294967296LL + (long long )N) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n1) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )n1) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n2) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )n1 >= 0LL) && (4294967295LL - (long long )N) + (long long )n2 >= 0LL) && (4294967295LL + (long long )n1) - (long long )n2 >= 0LL) && (4294967295LL + (long long )N) - (long long )n1 >= 0LL) && (4294967295LL + (long long )N) - (long long )n2 >= 0LL) && (4294967294LL - (long long )n1) - (long long )n2 >= 0LL) && (4294967294LL - (long long )N) - (long long )n1 >= 0LL) && (4294967294LL - (long long )N) - (long long )n2 >= 0LL) [2024-05-12 11:03:27,373 INFO L97 edCorrectnessWitness]: Location invariant before [L120-L120] ! multithreaded || (((((((((((((((((((((((((((((((((4294967296LL + (long long )q1_front) + (long long )q2_front >= 0LL && (4294967296LL + (long long )q1_front) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )q2_back) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )n1) + (long long )n2 >= 0LL) && (4294967296LL + (long long )n2) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )n1 >= 0LL) && (4294967296LL + (long long )N) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n1) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )n1) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n2) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )n1 >= 0LL) && (4294967295LL - (long long )N) + (long long )n2 >= 0LL) && (4294967295LL + (long long )n1) - (long long )n2 >= 0LL) && (4294967295LL + (long long )N) - (long long )n1 >= 0LL) && (4294967295LL + (long long )N) - (long long )n2 >= 0LL) && (4294967294LL - (long long )n1) - (long long )n2 >= 0LL) && (4294967294LL - (long long )N) - (long long )n1 >= 0LL) && (4294967294LL - (long long )N) - (long long )n2 >= 0LL) [2024-05-12 11:03:27,375 INFO L97 edCorrectnessWitness]: Location invariant before [L121-L121] ! multithreaded || (((((((((((((((((((((((((((((((((4294967296LL + (long long )q1_front) + (long long )q2_front >= 0LL && (4294967296LL + (long long )q1_front) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )q2_back) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n1) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )n1) + (long long )n2 >= 0LL) && (4294967296LL + (long long )n2) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )n2) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )q1_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_front >= 0LL) && (4294967296LL + (long long )N) + (long long )q2_back >= 0LL) && (4294967296LL + (long long )N) + (long long )n1 >= 0LL) && (4294967296LL + (long long )N) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n1) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n1) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )n1) + (long long )n2 >= 0LL) && (4294967295LL - (long long )n2) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )n2) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )q1_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_front >= 0LL) && (4294967295LL - (long long )N) + (long long )q2_back >= 0LL) && (4294967295LL - (long long )N) + (long long )n1 >= 0LL) && (4294967295LL - (long long )N) + (long long )n2 >= 0LL) && (4294967295LL + (long long )n1) - (long long )n2 >= 0LL) && (4294967295LL + (long long )N) - (long long )n1 >= 0LL) && (4294967295LL + (long long )N) - (long long )n2 >= 0LL) && (4294967294LL - (long long )n1) - (long long )n2 >= 0LL) && (4294967294LL - (long long )N) - (long long )n1 >= 0LL) && (4294967294LL - (long long )N) - (long long )n2 >= 0LL) [2024-05-12 11:03:27,375 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:03:27,375 INFO L106 edCorrectnessWitness]: ghost_update [L118-L118] multithreaded = 1; [2024-05-12 11:03:27,397 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:03:27,528 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2024-05-12 11:03:27,535 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:03:27,541 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:03:27,615 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2024-05-12 11:03:27,618 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:03:27,644 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:03:27,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27 WrapperNode [2024-05-12 11:03:27,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:03:27,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:03:27,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:03:27,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:03:27,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,689 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 260 [2024-05-12 11:03:27,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:03:27,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:03:27,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:03:27,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:03:27,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,702 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,714 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 2, 1]. [2024-05-12 11:03:27,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,737 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:03:27,738 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:03:27,738 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:03:27,738 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:03:27,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (1/1) ... [2024-05-12 11:03:27,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:03:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:27,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 11:03:27,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 11:03:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 11:03:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 11:03:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 11:03:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 11:03:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 11:03:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 11:03:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 11:03:27,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 11:03:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 11:03:27,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 11:03:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-05-12 11:03:27,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:03:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 11:03:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:03:27,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:03:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:03:27,843 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 11:03:27,940 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:03:27,942 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:03:28,372 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:03:28,372 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:03:28,713 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:03:28,713 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-05-12 11:03:28,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:03:28 BoogieIcfgContainer [2024-05-12 11:03:28,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:03:28,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:03:28,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:03:28,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:03:28,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:03:26" (1/4) ... [2024-05-12 11:03:28,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b3dc74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:03:28, skipping insertion in model container [2024-05-12 11:03:28,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:03:27" (2/4) ... [2024-05-12 11:03:28,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b3dc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:03:28, skipping insertion in model container [2024-05-12 11:03:28,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:03:27" (3/4) ... [2024-05-12 11:03:28,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b3dc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:03:28, skipping insertion in model container [2024-05-12 11:03:28,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:03:28" (4/4) ... [2024-05-12 11:03:28,725 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-05-12 11:03:28,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:03:28,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 11:03:28,740 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:03:28,785 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-05-12 11:03:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 54 transitions, 129 flow [2024-05-12 11:03:28,850 INFO L124 PetriNetUnfolderBase]: 7/51 cut-off events. [2024-05-12 11:03:28,850 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 11:03:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 7/51 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-05-12 11:03:28,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 54 transitions, 129 flow [2024-05-12 11:03:28,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 50 transitions, 118 flow [2024-05-12 11:03:28,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:03:28,877 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@25bcf9ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:03:28,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 11:03:28,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:03:28,884 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2024-05-12 11:03:28,884 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:03:28,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:28,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:28,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:28,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 82944404, now seen corresponding path program 1 times [2024-05-12 11:03:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88876159] [2024-05-12 11:03:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88876159] [2024-05-12 11:03:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88876159] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:30,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:30,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:03:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213770622] [2024-05-12 11:03:30,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:03:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:03:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:03:30,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-05-12 11:03:30,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-05-12 11:03:30,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:30,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-05-12 11:03:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:30,616 INFO L124 PetriNetUnfolderBase]: 1260/2256 cut-off events. [2024-05-12 11:03:30,616 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-05-12 11:03:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4165 conditions, 2256 events. 1260/2256 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13476 event pairs, 543 based on Foata normal form. 425/2371 useless extension candidates. Maximal degree in co-relation 2358. Up to 1558 conditions per place. [2024-05-12 11:03:30,631 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 54 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2024-05-12 11:03:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 292 flow [2024-05-12 11:03:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:03:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:03:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 11:03:30,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-05-12 11:03:30,643 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 118 flow. Second operand 5 states and 147 transitions. [2024-05-12 11:03:30,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 292 flow [2024-05-12 11:03:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:03:30,650 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 143 flow [2024-05-12 11:03:30,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-05-12 11:03:30,654 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-05-12 11:03:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 143 flow [2024-05-12 11:03:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-05-12 11:03:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:30,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:30,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:03:30,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:30,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1831050946, now seen corresponding path program 1 times [2024-05-12 11:03:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:30,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086224310] [2024-05-12 11:03:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:31,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:31,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086224310] [2024-05-12 11:03:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086224310] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:31,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992484254] [2024-05-12 11:03:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:31,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:31,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:31,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 11:03:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:31,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:03:31,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:31,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992484254] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:32,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-05-12 11:03:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862130760] [2024-05-12 11:03:32,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 11:03:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 11:03:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-05-12 11:03:32,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-05-12 11:03:32,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 143 flow. Second operand has 14 states, 14 states have (on average 17.928571428571427) internal successors, (251), 14 states have internal predecessors, (251), 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) [2024-05-12 11:03:32,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:33,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-05-12 11:03:33,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:34,106 INFO L124 PetriNetUnfolderBase]: 1772/3342 cut-off events. [2024-05-12 11:03:34,106 INFO L125 PetriNetUnfolderBase]: For 523/589 co-relation queries the response was YES. [2024-05-12 11:03:34,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 3342 events. 1772/3342 cut-off events. For 523/589 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22493 event pairs, 827 based on Foata normal form. 232/3284 useless extension candidates. Maximal degree in co-relation 4313. Up to 1409 conditions per place. [2024-05-12 11:03:34,123 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 74 selfloop transitions, 7 changer transitions 0/94 dead transitions. [2024-05-12 11:03:34,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 403 flow [2024-05-12 11:03:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:03:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:03:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 11:03:34,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 11:03:34,125 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 143 flow. Second operand 8 states and 216 transitions. [2024-05-12 11:03:34,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 403 flow [2024-05-12 11:03:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 398 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 11:03:34,128 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 173 flow [2024-05-12 11:03:34,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-05-12 11:03:34,129 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-05-12 11:03:34,129 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 173 flow [2024-05-12 11:03:34,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.928571428571427) internal successors, (251), 14 states have internal predecessors, (251), 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) [2024-05-12 11:03:34,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:34,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:34,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:34,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:34,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash -393409572, now seen corresponding path program 1 times [2024-05-12 11:03:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27793644] [2024-05-12 11:03:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:34,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27793644] [2024-05-12 11:03:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27793644] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:34,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:34,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:03:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7320020] [2024-05-12 11:03:34,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:34,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:03:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:34,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:03:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:03:34,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-05-12 11:03:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:34,653 INFO L124 PetriNetUnfolderBase]: 1495/2839 cut-off events. [2024-05-12 11:03:34,653 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-05-12 11:03:34,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 2839 events. 1495/2839 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18275 event pairs, 440 based on Foata normal form. 36/2689 useless extension candidates. Maximal degree in co-relation 2707. Up to 2103 conditions per place. [2024-05-12 11:03:34,668 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 50 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2024-05-12 11:03:34,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 311 flow [2024-05-12 11:03:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:03:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:03:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-05-12 11:03:34,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-05-12 11:03:34,670 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 173 flow. Second operand 3 states and 103 transitions. [2024-05-12 11:03:34,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 311 flow [2024-05-12 11:03:34,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 297 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 11:03:34,672 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 178 flow [2024-05-12 11:03:34,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-05-12 11:03:34,673 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-05-12 11:03:34,674 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 178 flow [2024-05-12 11:03:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-05-12 11:03:34,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:34,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:03:34,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:34,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1022711518, now seen corresponding path program 2 times [2024-05-12 11:03:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954356105] [2024-05-12 11:03:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954356105] [2024-05-12 11:03:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954356105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:34,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:03:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784543938] [2024-05-12 11:03:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:03:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:03:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:03:34,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:34,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2024-05-12 11:03:34,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:34,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:34,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:35,065 INFO L124 PetriNetUnfolderBase]: 1322/2625 cut-off events. [2024-05-12 11:03:35,065 INFO L125 PetriNetUnfolderBase]: For 1289/1329 co-relation queries the response was YES. [2024-05-12 11:03:35,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 2625 events. 1322/2625 cut-off events. For 1289/1329 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17538 event pairs, 917 based on Foata normal form. 16/2408 useless extension candidates. Maximal degree in co-relation 2953. Up to 1930 conditions per place. [2024-05-12 11:03:35,081 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 37 selfloop transitions, 2 changer transitions 15/67 dead transitions. [2024-05-12 11:03:35,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 311 flow [2024-05-12 11:03:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:03:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:03:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-05-12 11:03:35,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-05-12 11:03:35,082 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 178 flow. Second operand 4 states and 126 transitions. [2024-05-12 11:03:35,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 311 flow [2024-05-12 11:03:35,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:03:35,085 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 166 flow [2024-05-12 11:03:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-05-12 11:03:35,086 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-05-12 11:03:35,086 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 166 flow [2024-05-12 11:03:35,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2024-05-12 11:03:35,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:35,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:35,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 11:03:35,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:35,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1649271326, now seen corresponding path program 1 times [2024-05-12 11:03:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:35,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695199072] [2024-05-12 11:03:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:35,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:35,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:35,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695199072] [2024-05-12 11:03:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695199072] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:35,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:35,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 11:03:35,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362784235] [2024-05-12 11:03:35,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:35,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:03:35,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:35,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:03:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:03:35,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:35,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-05-12 11:03:35,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:35,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:35,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:35,512 INFO L124 PetriNetUnfolderBase]: 1559/3110 cut-off events. [2024-05-12 11:03:35,512 INFO L125 PetriNetUnfolderBase]: For 1824/1870 co-relation queries the response was YES. [2024-05-12 11:03:35,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7040 conditions, 3110 events. 1559/3110 cut-off events. For 1824/1870 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 21420 event pairs, 1095 based on Foata normal form. 80/2938 useless extension candidates. Maximal degree in co-relation 7020. Up to 1931 conditions per place. [2024-05-12 11:03:35,531 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 37 selfloop transitions, 3 changer transitions 23/76 dead transitions. [2024-05-12 11:03:35,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 366 flow [2024-05-12 11:03:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:03:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:03:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-05-12 11:03:35,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-05-12 11:03:35,533 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 166 flow. Second operand 4 states and 131 transitions. [2024-05-12 11:03:35,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 366 flow [2024-05-12 11:03:35,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 346 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 11:03:35,539 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 175 flow [2024-05-12 11:03:35,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-05-12 11:03:35,542 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-05-12 11:03:35,542 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 175 flow [2024-05-12 11:03:35,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-05-12 11:03:35,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:35,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:35,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 11:03:35,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:35,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1387503278, now seen corresponding path program 1 times [2024-05-12 11:03:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:35,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312846853] [2024-05-12 11:03:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:35,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:03:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312846853] [2024-05-12 11:03:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312846853] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:03:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557043098] [2024-05-12 11:03:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:03:35,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:03:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:03:35,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-05-12 11:03:35,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:03:35,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:35,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-05-12 11:03:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:36,432 INFO L124 PetriNetUnfolderBase]: 3978/6545 cut-off events. [2024-05-12 11:03:36,433 INFO L125 PetriNetUnfolderBase]: For 3325/3357 co-relation queries the response was YES. [2024-05-12 11:03:36,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15470 conditions, 6545 events. 3978/6545 cut-off events. For 3325/3357 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43759 event pairs, 1067 based on Foata normal form. 2/6346 useless extension candidates. Maximal degree in co-relation 8190. Up to 2066 conditions per place. [2024-05-12 11:03:36,462 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 102 selfloop transitions, 10 changer transitions 14/135 dead transitions. [2024-05-12 11:03:36,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 135 transitions, 672 flow [2024-05-12 11:03:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:03:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:03:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-05-12 11:03:36,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-05-12 11:03:36,464 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 175 flow. Second operand 8 states and 237 transitions. [2024-05-12 11:03:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 135 transitions, 672 flow [2024-05-12 11:03:36,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 639 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 11:03:36,467 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 225 flow [2024-05-12 11:03:36,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=225, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-05-12 11:03:36,468 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 16 predicate places. [2024-05-12 11:03:36,468 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 225 flow [2024-05-12 11:03:36,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:03:36,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:36,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:36,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 11:03:36,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:36,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2076606568, now seen corresponding path program 2 times [2024-05-12 11:03:36,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:36,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584171105] [2024-05-12 11:03:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-05-12 11:03:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584171105] [2024-05-12 11:03:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584171105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:36,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:03:36,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:03:36,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370705466] [2024-05-12 11:03:36,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:03:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:36,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:03:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:03:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-05-12 11:03:36,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:36,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:36,857 INFO L124 PetriNetUnfolderBase]: 2105/4178 cut-off events. [2024-05-12 11:03:36,857 INFO L125 PetriNetUnfolderBase]: For 2375/2536 co-relation queries the response was YES. [2024-05-12 11:03:36,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9993 conditions, 4178 events. 2105/4178 cut-off events. For 2375/2536 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 30315 event pairs, 568 based on Foata normal form. 48/4080 useless extension candidates. Maximal degree in co-relation 9972. Up to 2361 conditions per place. [2024-05-12 11:03:36,882 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-05-12 11:03:36,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 385 flow [2024-05-12 11:03:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:03:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:03:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-05-12 11:03:36,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-05-12 11:03:36,883 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 225 flow. Second operand 3 states and 104 transitions. [2024-05-12 11:03:36,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 385 flow [2024-05-12 11:03:36,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 374 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 11:03:36,887 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 228 flow [2024-05-12 11:03:36,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-05-12 11:03:36,887 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-05-12 11:03:36,887 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 228 flow [2024-05-12 11:03:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-05-12 11:03:36,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:36,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:36,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 11:03:36,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:36,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1842647000, now seen corresponding path program 1 times [2024-05-12 11:03:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413375020] [2024-05-12 11:03:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:36,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:37,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413375020] [2024-05-12 11:03:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413375020] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180644097] [2024-05-12 11:03:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:37,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:37,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:37,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:37,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 11:03:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:37,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:03:37,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:37,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180644097] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:37,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-05-12 11:03:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225053902] [2024-05-12 11:03:37,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:37,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 11:03:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:37,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 11:03:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:03:37,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:37,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 228 flow. Second operand has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2024-05-12 11:03:37,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:37,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:37,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:37,728 INFO L124 PetriNetUnfolderBase]: 1724/3511 cut-off events. [2024-05-12 11:03:37,728 INFO L125 PetriNetUnfolderBase]: For 2728/2778 co-relation queries the response was YES. [2024-05-12 11:03:37,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8924 conditions, 3511 events. 1724/3511 cut-off events. For 2728/2778 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25082 event pairs, 1032 based on Foata normal form. 137/3534 useless extension candidates. Maximal degree in co-relation 5258. Up to 1502 conditions per place. [2024-05-12 11:03:37,741 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 75 selfloop transitions, 5 changer transitions 4/100 dead transitions. [2024-05-12 11:03:37,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 517 flow [2024-05-12 11:03:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:03:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:03:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-05-12 11:03:37,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-05-12 11:03:37,743 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 228 flow. Second operand 6 states and 189 transitions. [2024-05-12 11:03:37,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 517 flow [2024-05-12 11:03:37,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 514 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:03:37,745 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 250 flow [2024-05-12 11:03:37,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-05-12 11:03:37,746 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-05-12 11:03:37,746 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 250 flow [2024-05-12 11:03:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2024-05-12 11:03:37,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:37,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:37,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-05-12 11:03:37,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:37,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1779357016, now seen corresponding path program 1 times [2024-05-12 11:03:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:37,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306980512] [2024-05-12 11:03:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:37,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306980512] [2024-05-12 11:03:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306980512] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21922087] [2024-05-12 11:03:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:38,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:38,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 11:03:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:38,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2024-05-12 11:03:38,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:03:38,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 11:03:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21922087] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:03:38,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 11:03:38,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-05-12 11:03:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830134810] [2024-05-12 11:03:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:03:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:03:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:03:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:03:38,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:38,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-05-12 11:03:38,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:38,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:38,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:38,870 INFO L124 PetriNetUnfolderBase]: 3105/6370 cut-off events. [2024-05-12 11:03:38,871 INFO L125 PetriNetUnfolderBase]: For 6496/6850 co-relation queries the response was YES. [2024-05-12 11:03:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15750 conditions, 6370 events. 3105/6370 cut-off events. For 6496/6850 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 49310 event pairs, 727 based on Foata normal form. 229/6333 useless extension candidates. Maximal degree in co-relation 12132. Up to 1661 conditions per place. [2024-05-12 11:03:38,904 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 82 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2024-05-12 11:03:38,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 577 flow [2024-05-12 11:03:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:03:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:03:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-05-12 11:03:38,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-05-12 11:03:38,905 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 250 flow. Second operand 4 states and 150 transitions. [2024-05-12 11:03:38,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 577 flow [2024-05-12 11:03:38,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 557 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 11:03:38,911 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 301 flow [2024-05-12 11:03:38,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2024-05-12 11:03:38,912 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-05-12 11:03:38,912 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 301 flow [2024-05-12 11:03:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-05-12 11:03:38,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:38,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:38,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:39,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:39,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:39,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash -377572668, now seen corresponding path program 2 times [2024-05-12 11:03:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905621175] [2024-05-12 11:03:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:39,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905621175] [2024-05-12 11:03:39,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905621175] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144981333] [2024-05-12 11:03:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:03:39,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:39,690 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:39,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 11:03:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:03:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:39,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:03:39,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:40,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-05-12 11:03:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:40,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:40,199 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:03:40,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-05-12 11:03:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:03:40,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144981333] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:40,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:40,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-05-12 11:03:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706849436] [2024-05-12 11:03:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:40,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-05-12 11:03:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-05-12 11:03:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-05-12 11:03:40,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-05-12 11:03:40,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 301 flow. Second operand has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 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) [2024-05-12 11:03:40,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:40,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-05-12 11:03:40,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:45,805 INFO L124 PetriNetUnfolderBase]: 19933/33723 cut-off events. [2024-05-12 11:03:45,805 INFO L125 PetriNetUnfolderBase]: For 77308/79750 co-relation queries the response was YES. [2024-05-12 11:03:45,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95852 conditions, 33723 events. 19933/33723 cut-off events. For 77308/79750 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 279379 event pairs, 2738 based on Foata normal form. 371/32917 useless extension candidates. Maximal degree in co-relation 89879. Up to 5168 conditions per place. [2024-05-12 11:03:46,038 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 522 selfloop transitions, 74 changer transitions 0/609 dead transitions. [2024-05-12 11:03:46,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 609 transitions, 3711 flow [2024-05-12 11:03:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-05-12 11:03:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-05-12 11:03:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1127 transitions. [2024-05-12 11:03:46,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640640640640641 [2024-05-12 11:03:46,042 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 301 flow. Second operand 37 states and 1127 transitions. [2024-05-12 11:03:46,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 609 transitions, 3711 flow [2024-05-12 11:03:46,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 609 transitions, 3551 flow, removed 80 selfloop flow, removed 0 redundant places. [2024-05-12 11:03:46,061 INFO L231 Difference]: Finished difference. Result has 123 places, 152 transitions, 908 flow [2024-05-12 11:03:46,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=908, PETRI_PLACES=123, PETRI_TRANSITIONS=152} [2024-05-12 11:03:46,062 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-05-12 11:03:46,062 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 152 transitions, 908 flow [2024-05-12 11:03:46,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 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) [2024-05-12 11:03:46,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:46,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:46,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-05-12 11:03:46,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:46,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:46,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash 639228292, now seen corresponding path program 3 times [2024-05-12 11:03:46,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:46,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670627440] [2024-05-12 11:03:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:47,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:47,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670627440] [2024-05-12 11:03:47,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670627440] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:47,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531972279] [2024-05-12 11:03:47,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:03:47,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:47,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:47,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 11:03:47,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-05-12 11:03:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:47,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 15 conjunts are in the unsatisfiable core [2024-05-12 11:03:47,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:03:47,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:47,408 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:03:47,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-05-12 11:03:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-05-12 11:03:47,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531972279] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:47,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:47,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 17 [2024-05-12 11:03:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465981998] [2024-05-12 11:03:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-05-12 11:03:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-05-12 11:03:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2024-05-12 11:03:47,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-05-12 11:03:47,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 152 transitions, 908 flow. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 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) [2024-05-12 11:03:47,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:47,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-05-12 11:03:47,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:53,884 INFO L124 PetriNetUnfolderBase]: 26339/44599 cut-off events. [2024-05-12 11:03:53,885 INFO L125 PetriNetUnfolderBase]: For 126086/128795 co-relation queries the response was YES. [2024-05-12 11:03:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143447 conditions, 44599 events. 26339/44599 cut-off events. For 126086/128795 co-relation queries the response was YES. Maximal size of possible extension queue 1715. Compared 379969 event pairs, 4335 based on Foata normal form. 511/44487 useless extension candidates. Maximal degree in co-relation 136655. Up to 18614 conditions per place. [2024-05-12 11:03:54,551 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 410 selfloop transitions, 150 changer transitions 0/573 dead transitions. [2024-05-12 11:03:54,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 573 transitions, 4117 flow [2024-05-12 11:03:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-05-12 11:03:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-05-12 11:03:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 816 transitions. [2024-05-12 11:03:54,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210727969348659 [2024-05-12 11:03:54,555 INFO L175 Difference]: Start difference. First operand has 123 places, 152 transitions, 908 flow. Second operand 29 states and 816 transitions. [2024-05-12 11:03:54,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 573 transitions, 4117 flow [2024-05-12 11:03:54,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 573 transitions, 3710 flow, removed 199 selfloop flow, removed 4 redundant places. [2024-05-12 11:03:54,962 INFO L231 Difference]: Finished difference. Result has 157 places, 266 transitions, 2051 flow [2024-05-12 11:03:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2051, PETRI_PLACES=157, PETRI_TRANSITIONS=266} [2024-05-12 11:03:54,962 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-05-12 11:03:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 266 transitions, 2051 flow [2024-05-12 11:03:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 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) [2024-05-12 11:03:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:54,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:54,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-05-12 11:03:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-05-12 11:03:55,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:03:55,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1788191241, now seen corresponding path program 1 times [2024-05-12 11:03:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:55,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792294957] [2024-05-12 11:03:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:03:55,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792294957] [2024-05-12 11:03:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792294957] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223434891] [2024-05-12 11:03:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:55,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:55,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:55,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 11:03:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:55,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:03:55,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 11:03:55,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 11:03:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223434891] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:55,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-05-12 11:03:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573298290] [2024-05-12 11:03:55,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 11:03:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 11:03:55,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:03:55,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 11:03:55,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 266 transitions, 2051 flow. Second operand has 13 states, 13 states have (on average 23.923076923076923) internal successors, (311), 13 states have internal predecessors, (311), 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) [2024-05-12 11:03:55,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:55,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 11:03:55,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:00,069 INFO L124 PetriNetUnfolderBase]: 17323/33542 cut-off events. [2024-05-12 11:04:00,069 INFO L125 PetriNetUnfolderBase]: For 114524/117220 co-relation queries the response was YES. [2024-05-12 11:04:00,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111134 conditions, 33542 events. 17323/33542 cut-off events. For 114524/117220 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 316031 event pairs, 4649 based on Foata normal form. 1137/34300 useless extension candidates. Maximal degree in co-relation 108964. Up to 18982 conditions per place. [2024-05-12 11:04:00,478 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 120 selfloop transitions, 13 changer transitions 248/415 dead transitions. [2024-05-12 11:04:00,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 415 transitions, 3227 flow [2024-05-12 11:04:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 11:04:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 11:04:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 551 transitions. [2024-05-12 11:04:00,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-05-12 11:04:00,480 INFO L175 Difference]: Start difference. First operand has 157 places, 266 transitions, 2051 flow. Second operand 19 states and 551 transitions. [2024-05-12 11:04:00,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 415 transitions, 3227 flow [2024-05-12 11:04:01,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 415 transitions, 3088 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-05-12 11:04:01,330 INFO L231 Difference]: Finished difference. Result has 170 places, 159 transitions, 1022 flow [2024-05-12 11:04:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1022, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2024-05-12 11:04:01,331 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 117 predicate places. [2024-05-12 11:04:01,331 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 1022 flow [2024-05-12 11:04:01,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.923076923076923) internal successors, (311), 13 states have internal predecessors, (311), 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) [2024-05-12 11:04:01,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:01,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:01,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:01,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 178724867, now seen corresponding path program 1 times [2024-05-12 11:04:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073784175] [2024-05-12 11:04:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073784175] [2024-05-12 11:04:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073784175] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862861172] [2024-05-12 11:04:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:02,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:02,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:04:02,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 11:04:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:03,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 32 conjunts are in the unsatisfiable core [2024-05-12 11:04:03,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:03,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 11:04:03,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2024-05-12 11:04:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:03,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:03,857 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-05-12 11:04:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 99 [2024-05-12 11:04:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:04,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862861172] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:04,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:04,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 36 [2024-05-12 11:04:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260140916] [2024-05-12 11:04:04,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-05-12 11:04:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-05-12 11:04:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-05-12 11:04:05,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-05-12 11:04:05,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 1022 flow. Second operand has 37 states, 37 states have (on average 15.972972972972974) internal successors, (591), 37 states have internal predecessors, (591), 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) [2024-05-12 11:04:05,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:05,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-05-12 11:04:05,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand