./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 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/pthread-ext/31_simple_loop5_vs-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.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-dev-59af5db-m [2024-02-02 09:12:28,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:12:29,061 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:12:29,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:12:29,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:12:29,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:12:29,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:12:29,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:12:29,078 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:12:29,078 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:12:29,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:12:29,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:12:29,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:12:29,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:12:29,080 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:12:29,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:12:29,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:12:29,081 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:12:29,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:12:29,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:12:29,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:12:29,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:12:29,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:12:29,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:12:29,082 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:12:29,083 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:12:29,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:12:29,083 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:12:29,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:12:29,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:12:29,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:12:29,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:12:29,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:12:29,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:12:29,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:12:29,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:12:29,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:12:29,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:12:29,086 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:12:29,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:12:29,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:12:29,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:12:29,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:12:29,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:12:29,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:12:29,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:12:29,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:12:29,311 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:12:29,311 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:12:29,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml [2024-02-02 09:12:29,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:12:29,440 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:12:29,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-02 09:12:30,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:12:30,737 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:12:30,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-02 09:12:30,751 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/472190256/6afcf87266cc422aa36d9cb6d4485fd5/FLAGd66509433 [2024-02-02 09:12:30,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/472190256/6afcf87266cc422aa36d9cb6d4485fd5 [2024-02-02 09:12:30,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:12:30,770 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:12:30,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:12:30,772 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:12:30,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:12:30,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:12:29" (1/2) ... [2024-02-02 09:12:30,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74774608 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:12:30, skipping insertion in model container [2024-02-02 09:12:30,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:12:29" (1/2) ... [2024-02-02 09:12:30,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e37aa33 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:12:30, skipping insertion in model container [2024-02-02 09:12:30,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:12:30" (2/2) ... [2024-02-02 09:12:30,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74774608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:30, skipping insertion in model container [2024-02-02 09:12:30,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:12:30" (2/2) ... [2024-02-02 09:12:30,779 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:12:30,909 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:12:30,910 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] (((((((((((((((((((((((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3)) && (0 <= a)) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Location invariant before [L708-L708] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Loop invariant at [L704-L709] (unsigned long )arg == 0UL [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] (((((((((((((((((((((((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3)) && (0 <= a)) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Loop invariant at [L693-L693] (unsigned long )arg == 0UL [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Location invariant before [L697-L697] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-02 09:12:30,911 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-02 09:12:30,912 INFO L101 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-02-02 09:12:30,912 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L694] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-02 09:12:30,912 INFO L101 nessWitnessExtractor]: Location invariant before [L698-L698] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-02 09:12:30,912 INFO L101 nessWitnessExtractor]: Location invariant before [L714-L714] (((a == 1) && (b == 2)) && (c == 3)) && (temp == 0) [2024-02-02 09:12:30,912 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-02 09:12:30,951 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:12:31,250 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2024-02-02 09:12:31,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:12:31,276 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:12:31,355 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] Start Parsing Local [2024-02-02 09:12:31,361 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:12:31,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:12:31,393 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:12:31,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31 WrapperNode [2024-02-02 09:12:31,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:12:31,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:12:31,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:12:31,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:12:31,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,451 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-02-02 09:12:31,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:12:31,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:12:31,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:12:31,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:12:31,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,517 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-02-02 09:12:31,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,532 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,539 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:12:31,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:12:31,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:12:31,540 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:12:31,540 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (1/1) ... [2024-02-02 09:12:31,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:12:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:12:31,724 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) [2024-02-02 09:12:31,732 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 [2024-02-02 09:12:31,759 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-02-02 09:12:31,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-02-02 09:12:31,759 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-02 09:12:31,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-02 09:12:31,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:12:31,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:12:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:12:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 09:12:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:12:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:12:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:12:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:12:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:12:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:12:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 09:12:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:12:31,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:12:31,763 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:12:31,854 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:12:31,855 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:12:32,151 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:12:32,151 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:12:32,198 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:12:32,199 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-02 09:12:32,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:12:32 BoogieIcfgContainer [2024-02-02 09:12:32,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:12:32,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:12:32,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:12:32,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:12:32,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:12:29" (1/4) ... [2024-02-02 09:12:32,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36df62f6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:12:32, skipping insertion in model container [2024-02-02 09:12:32,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:12:30" (2/4) ... [2024-02-02 09:12:32,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36df62f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:12:32, skipping insertion in model container [2024-02-02 09:12:32,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:12:31" (3/4) ... [2024-02-02 09:12:32,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36df62f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:12:32, skipping insertion in model container [2024-02-02 09:12:32,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:12:32" (4/4) ... [2024-02-02 09:12:32,205 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-02-02 09:12:32,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:12:32,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-02 09:12:32,219 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:12:32,349 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:12:32,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 53 transitions, 114 flow [2024-02-02 09:12:32,402 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2024-02-02 09:12:32,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:12:32,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 54 events. 3/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 111 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2024-02-02 09:12:32,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 53 transitions, 114 flow [2024-02-02 09:12:32,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 111 flow [2024-02-02 09:12:32,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:12:32,421 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;@4e2d8c41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:12:32,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-02-02 09:12:32,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:12:32,424 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:12:32,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:12:32,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:32,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:12:32,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-02 09:12:32,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 7861, now seen corresponding path program 1 times [2024-02-02 09:12:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:32,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155908439] [2024-02-02 09:12:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:32,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155908439] [2024-02-02 09:12:32,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155908439] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:32,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:32,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:12:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275059618] [2024-02-02 09:12:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:32,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:12:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:12:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:12:32,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 53 [2024-02-02 09:12:32,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-02-02 09:12:32,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:32,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 53 [2024-02-02 09:12:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:32,899 INFO L124 PetriNetUnfolderBase]: 151/437 cut-off events. [2024-02-02 09:12:32,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:12:32,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 437 events. 151/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2494 event pairs, 40 based on Foata normal form. 78/467 useless extension candidates. Maximal degree in co-relation 700. Up to 213 conditions per place. [2024-02-02 09:12:32,907 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-02-02 09:12:32,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 159 flow [2024-02-02 09:12:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:12:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:12:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-02-02 09:12:32,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7861635220125787 [2024-02-02 09:12:32,918 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 111 flow. Second operand 3 states and 125 transitions. [2024-02-02 09:12:32,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 159 flow [2024-02-02 09:12:32,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:32,925 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 112 flow [2024-02-02 09:12:32,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-02-02 09:12:32,930 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2024-02-02 09:12:32,930 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 112 flow [2024-02-02 09:12:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-02-02 09:12:32,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:32,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:12:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:12:32,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-02 09:12:32,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 234499080, now seen corresponding path program 1 times [2024-02-02 09:12:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:32,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764583099] [2024-02-02 09:12:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:33,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764583099] [2024-02-02 09:12:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764583099] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:33,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:33,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:12:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588706379] [2024-02-02 09:12:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:33,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 53 [2024-02-02 09:12:33,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2024-02-02 09:12:33,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:33,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 53 [2024-02-02 09:12:33,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:33,209 INFO L124 PetriNetUnfolderBase]: 176/640 cut-off events. [2024-02-02 09:12:33,209 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-02 09:12:33,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 640 events. 176/640 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3939 event pairs, 14 based on Foata normal form. 81/651 useless extension candidates. Maximal degree in co-relation 958. Up to 213 conditions per place. [2024-02-02 09:12:33,213 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 26 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-02-02 09:12:33,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 192 flow [2024-02-02 09:12:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-02-02 09:12:33,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028301886792453 [2024-02-02 09:12:33,215 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 112 flow. Second operand 4 states and 149 transitions. [2024-02-02 09:12:33,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 192 flow [2024-02-02 09:12:33,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:33,217 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 108 flow [2024-02-02 09:12:33,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-02-02 09:12:33,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2024-02-02 09:12:33,218 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 108 flow [2024-02-02 09:12:33,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2024-02-02 09:12:33,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:33,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:12:33,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-02 09:12:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1627731790, now seen corresponding path program 1 times [2024-02-02 09:12:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:33,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117559384] [2024-02-02 09:12:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:12:33,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 09:12:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:12:33,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 09:12:33,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 09:12:33,252 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-02-02 09:12:33,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-02-02 09:12:33,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-02-02 09:12:33,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-02-02 09:12:33,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-02-02 09:12:33,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-02-02 09:12:33,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-02-02 09:12:33,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-02-02 09:12:33,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (17 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-02-02 09:12:33,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-02-02 09:12:33,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 29 remaining) [2024-02-02 09:12:33,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-02-02 09:12:33,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-02-02 09:12:33,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-02-02 09:12:33,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-02-02 09:12:33,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-02-02 09:12:33,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-02-02 09:12:33,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-02-02 09:12:33,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-02-02 09:12:33,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-02-02 09:12:33,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-02-02 09:12:33,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (2 of 29 remaining) [2024-02-02 09:12:33,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-02-02 09:12:33,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-02-02 09:12:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:12:33,258 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-02 09:12:33,260 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 09:12:33,260 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-02 09:12:33,301 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:12:33,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 97 transitions, 214 flow [2024-02-02 09:12:33,310 INFO L124 PetriNetUnfolderBase]: 4/79 cut-off events. [2024-02-02 09:12:33,310 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:12:33,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 79 events. 4/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 226 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 86. Up to 3 conditions per place. [2024-02-02 09:12:33,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 97 transitions, 214 flow [2024-02-02 09:12:33,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 74 transitions, 161 flow [2024-02-02 09:12:33,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:12:33,313 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;@4e2d8c41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:12:33,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-02-02 09:12:33,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:12:33,314 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:12:33,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:12:33,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:33,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:12:33,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:12:33,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash 10965, now seen corresponding path program 1 times [2024-02-02 09:12:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:33,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111398718] [2024-02-02 09:12:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:33,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:33,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111398718] [2024-02-02 09:12:33,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111398718] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:33,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:33,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:12:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704009391] [2024-02-02 09:12:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:12:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:12:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:12:33,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 97 [2024-02-02 09:12:33,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:12:33,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:33,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 97 [2024-02-02 09:12:33,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:33,910 INFO L124 PetriNetUnfolderBase]: 2096/4470 cut-off events. [2024-02-02 09:12:33,910 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-02-02 09:12:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7585 conditions, 4470 events. 2096/4470 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 36493 event pairs, 631 based on Foata normal form. 870/4992 useless extension candidates. Maximal degree in co-relation 7572. Up to 2860 conditions per place. [2024-02-02 09:12:33,945 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 31 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-02-02 09:12:33,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 240 flow [2024-02-02 09:12:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:12:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:12:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-02-02 09:12:33,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7731958762886598 [2024-02-02 09:12:33,950 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 161 flow. Second operand 3 states and 225 transitions. [2024-02-02 09:12:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 240 flow [2024-02-02 09:12:33,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:33,953 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 167 flow [2024-02-02 09:12:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-02-02 09:12:33,955 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-02-02 09:12:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 167 flow [2024-02-02 09:12:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:12:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:33,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:12:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:12:33,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:12:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 327108660, now seen corresponding path program 1 times [2024-02-02 09:12:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137960685] [2024-02-02 09:12:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:34,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:34,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137960685] [2024-02-02 09:12:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137960685] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:34,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:34,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:12:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082696621] [2024-02-02 09:12:34,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:34,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:34,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 97 [2024-02-02 09:12:34,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 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) [2024-02-02 09:12:34,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:34,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 97 [2024-02-02 09:12:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:34,617 INFO L124 PetriNetUnfolderBase]: 1910/4654 cut-off events. [2024-02-02 09:12:34,617 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-02-02 09:12:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4654 events. 1910/4654 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 39195 event pairs, 921 based on Foata normal form. 549/4626 useless extension candidates. Maximal degree in co-relation 7881. Up to 2267 conditions per place. [2024-02-02 09:12:34,652 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 42 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-02-02 09:12:34,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 305 flow [2024-02-02 09:12:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-02-02 09:12:34,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7396907216494846 [2024-02-02 09:12:34,655 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 167 flow. Second operand 4 states and 287 transitions. [2024-02-02 09:12:34,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 305 flow [2024-02-02 09:12:34,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:34,657 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 162 flow [2024-02-02 09:12:34,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-02-02 09:12:34,658 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2024-02-02 09:12:34,658 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 162 flow [2024-02-02 09:12:34,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 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) [2024-02-02 09:12:34,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:34,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:12:34,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:12:34,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1035871013, now seen corresponding path program 1 times [2024-02-02 09:12:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338337478] [2024-02-02 09:12:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:34,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338337478] [2024-02-02 09:12:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338337478] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:34,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:34,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:12:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647318012] [2024-02-02 09:12:34,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:34,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:34,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:34,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:34,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2024-02-02 09:12:34,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2024-02-02 09:12:34,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:34,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2024-02-02 09:12:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:35,165 INFO L124 PetriNetUnfolderBase]: 1822/4208 cut-off events. [2024-02-02 09:12:35,165 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-02-02 09:12:35,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7158 conditions, 4208 events. 1822/4208 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 34270 event pairs, 362 based on Foata normal form. 320/4168 useless extension candidates. Maximal degree in co-relation 7142. Up to 2307 conditions per place. [2024-02-02 09:12:35,187 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 38 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-02 09:12:35,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 277 flow [2024-02-02 09:12:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-02-02 09:12:35,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7396907216494846 [2024-02-02 09:12:35,188 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 162 flow. Second operand 4 states and 287 transitions. [2024-02-02 09:12:35,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 277 flow [2024-02-02 09:12:35,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:12:35,190 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 159 flow [2024-02-02 09:12:35,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-02-02 09:12:35,191 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-02-02 09:12:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 159 flow [2024-02-02 09:12:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2024-02-02 09:12:35,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:35,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:12:35,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:12:35,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1862631509, now seen corresponding path program 1 times [2024-02-02 09:12:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:35,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40556821] [2024-02-02 09:12:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:35,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:35,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40556821] [2024-02-02 09:12:35,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40556821] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:35,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:12:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077711283] [2024-02-02 09:12:35,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:35,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 97 [2024-02-02 09:12:35,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2024-02-02 09:12:35,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:35,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 97 [2024-02-02 09:12:35,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:36,487 INFO L124 PetriNetUnfolderBase]: 6383/12452 cut-off events. [2024-02-02 09:12:36,487 INFO L125 PetriNetUnfolderBase]: For 1064/1064 co-relation queries the response was YES. [2024-02-02 09:12:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22751 conditions, 12452 events. 6383/12452 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 104729 event pairs, 1619 based on Foata normal form. 0/11369 useless extension candidates. Maximal degree in co-relation 22736. Up to 8437 conditions per place. [2024-02-02 09:12:36,556 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 51 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-02-02 09:12:36,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 337 flow [2024-02-02 09:12:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-02-02 09:12:36,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6572164948453608 [2024-02-02 09:12:36,558 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 159 flow. Second operand 4 states and 255 transitions. [2024-02-02 09:12:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 337 flow [2024-02-02 09:12:36,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:12:36,562 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 191 flow [2024-02-02 09:12:36,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-02-02 09:12:36,564 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-02-02 09:12:36,564 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 191 flow [2024-02-02 09:12:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2024-02-02 09:12:36,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:36,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:12:36,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:12:36,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2105944043, now seen corresponding path program 1 times [2024-02-02 09:12:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426588862] [2024-02-02 09:12:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:12:36,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 09:12:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:12:36,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 09:12:36,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 09:12:36,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2024-02-02 09:12:36,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 42 remaining) [2024-02-02 09:12:36,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 42 remaining) [2024-02-02 09:12:36,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 42 remaining) [2024-02-02 09:12:36,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 42 remaining) [2024-02-02 09:12:36,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (30 of 42 remaining) [2024-02-02 09:12:36,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 42 remaining) [2024-02-02 09:12:36,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 42 remaining) [2024-02-02 09:12:36,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 42 remaining) [2024-02-02 09:12:36,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (26 of 42 remaining) [2024-02-02 09:12:36,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 42 remaining) [2024-02-02 09:12:36,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 42 remaining) [2024-02-02 09:12:36,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (8 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 42 remaining) [2024-02-02 09:12:36,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (2 of 42 remaining) [2024-02-02 09:12:36,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 42 remaining) [2024-02-02 09:12:36,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 42 remaining) [2024-02-02 09:12:36,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:12:36,606 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-02-02 09:12:36,606 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 09:12:36,607 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-02 09:12:36,663 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:12:36,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 141 transitions, 318 flow [2024-02-02 09:12:36,679 INFO L124 PetriNetUnfolderBase]: 5/104 cut-off events. [2024-02-02 09:12:36,680 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-02 09:12:36,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 104 events. 5/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 346 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2024-02-02 09:12:36,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 141 transitions, 318 flow [2024-02-02 09:12:36,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 96 transitions, 213 flow [2024-02-02 09:12:36,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:12:36,683 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;@4e2d8c41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:12:36,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-02-02 09:12:36,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:12:36,683 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:12:36,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:12:36,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:36,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:12:36,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:12:36,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash 15477, now seen corresponding path program 1 times [2024-02-02 09:12:36,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:36,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292482703] [2024-02-02 09:12:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:36,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292482703] [2024-02-02 09:12:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292482703] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:36,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:12:36,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235936529] [2024-02-02 09:12:36,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:36,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:12:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:12:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:12:36,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 141 [2024-02-02 09:12:36,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2024-02-02 09:12:36,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:36,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 141 [2024-02-02 09:12:36,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:40,911 INFO L124 PetriNetUnfolderBase]: 23551/42425 cut-off events. [2024-02-02 09:12:40,912 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2024-02-02 09:12:41,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74256 conditions, 42425 events. 23551/42425 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 409920 event pairs, 9184 based on Foata normal form. 8648/48324 useless extension candidates. Maximal degree in co-relation 74242. Up to 30303 conditions per place. [2024-02-02 09:12:41,489 INFO L140 encePairwiseOnDemand]: 129/141 looper letters, 41 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2024-02-02 09:12:41,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 325 flow [2024-02-02 09:12:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:12:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:12:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2024-02-02 09:12:41,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7683215130023641 [2024-02-02 09:12:41,491 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 213 flow. Second operand 3 states and 325 transitions. [2024-02-02 09:12:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 325 flow [2024-02-02 09:12:41,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:41,494 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 222 flow [2024-02-02 09:12:41,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-02-02 09:12:41,495 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -4 predicate places. [2024-02-02 09:12:41,495 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 222 flow [2024-02-02 09:12:41,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2024-02-02 09:12:41,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:41,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:12:41,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:12:41,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:12:41,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 461708332, now seen corresponding path program 1 times [2024-02-02 09:12:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022729288] [2024-02-02 09:12:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:41,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022729288] [2024-02-02 09:12:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022729288] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:41,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:41,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:12:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522021384] [2024-02-02 09:12:41,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:41,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 141 [2024-02-02 09:12:41,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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) [2024-02-02 09:12:41,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:41,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 141 [2024-02-02 09:12:41,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:45,054 INFO L124 PetriNetUnfolderBase]: 17945/40459 cut-off events. [2024-02-02 09:12:45,055 INFO L125 PetriNetUnfolderBase]: For 3407/3407 co-relation queries the response was YES. [2024-02-02 09:12:45,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66863 conditions, 40459 events. 17945/40459 cut-off events. For 3407/3407 co-relation queries the response was YES. Maximal size of possible extension queue 1548. Compared 461575 event pairs, 2438 based on Foata normal form. 3699/40371 useless extension candidates. Maximal degree in co-relation 66847. Up to 17274 conditions per place. [2024-02-02 09:12:45,406 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 58 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-02-02 09:12:45,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 116 transitions, 418 flow [2024-02-02 09:12:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-02-02 09:12:45,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7535460992907801 [2024-02-02 09:12:45,408 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 222 flow. Second operand 4 states and 425 transitions. [2024-02-02 09:12:45,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 116 transitions, 418 flow [2024-02-02 09:12:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:12:45,410 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 216 flow [2024-02-02 09:12:45,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2024-02-02 09:12:45,411 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -5 predicate places. [2024-02-02 09:12:45,411 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 216 flow [2024-02-02 09:12:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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) [2024-02-02 09:12:45,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:45,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:45,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:12:45,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:12:45,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1591308044, now seen corresponding path program 1 times [2024-02-02 09:12:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:45,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45611337] [2024-02-02 09:12:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:45,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45611337] [2024-02-02 09:12:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45611337] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:45,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:12:45,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664604933] [2024-02-02 09:12:45,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:45,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:45,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:45,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 141 [2024-02-02 09:12:45,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2024-02-02 09:12:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:45,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 141 [2024-02-02 09:12:45,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:48,962 INFO L124 PetriNetUnfolderBase]: 18323/36010 cut-off events. [2024-02-02 09:12:48,962 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2024-02-02 09:12:49,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63258 conditions, 36010 events. 18323/36010 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 366813 event pairs, 5319 based on Foata normal form. 2476/35218 useless extension candidates. Maximal degree in co-relation 63241. Up to 21204 conditions per place. [2024-02-02 09:12:49,357 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 54 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-02-02 09:12:49,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 110 transitions, 388 flow [2024-02-02 09:12:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:12:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:12:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-02-02 09:12:49,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7535460992907801 [2024-02-02 09:12:49,365 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 216 flow. Second operand 4 states and 425 transitions. [2024-02-02 09:12:49,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 110 transitions, 388 flow [2024-02-02 09:12:49,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:12:49,371 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 213 flow [2024-02-02 09:12:49,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-02-02 09:12:49,372 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -6 predicate places. [2024-02-02 09:12:49,373 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 213 flow [2024-02-02 09:12:49,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2024-02-02 09:12:49,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:49,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:49,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:12:49,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:12:49,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2076497494, now seen corresponding path program 1 times [2024-02-02 09:12:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:49,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278903037] [2024-02-02 09:12:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:12:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278903037] [2024-02-02 09:12:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278903037] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:12:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649941792] [2024-02-02 09:12:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:49,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:12:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:12:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:12:49,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 141 [2024-02-02 09:12:49,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2024-02-02 09:12:49,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:49,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 141 [2024-02-02 09:12:49,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:13:01,094 INFO L124 PetriNetUnfolderBase]: 69643/120469 cut-off events. [2024-02-02 09:13:01,094 INFO L125 PetriNetUnfolderBase]: For 10106/10106 co-relation queries the response was YES. [2024-02-02 09:13:01,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222973 conditions, 120469 events. 69643/120469 cut-off events. For 10106/10106 co-relation queries the response was YES. Maximal size of possible extension queue 4133. Compared 1205512 event pairs, 25206 based on Foata normal form. 0/110150 useless extension candidates. Maximal degree in co-relation 222957. Up to 88112 conditions per place. [2024-02-02 09:13:02,311 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 63 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-02-02 09:13:02,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 441 flow [2024-02-02 09:13:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:13:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:13:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 385 transitions. [2024-02-02 09:13:02,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826241134751773 [2024-02-02 09:13:02,317 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 213 flow. Second operand 4 states and 385 transitions. [2024-02-02 09:13:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 441 flow [2024-02-02 09:13:02,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 114 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:13:02,321 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 255 flow [2024-02-02 09:13:02,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2024-02-02 09:13:02,322 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -3 predicate places. [2024-02-02 09:13:02,322 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 255 flow [2024-02-02 09:13:02,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2024-02-02 09:13:02,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:13:02,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:13:02,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 09:13:02,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:13:02,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:13:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash -81935683, now seen corresponding path program 1 times [2024-02-02 09:13:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:13:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798929137] [2024-02-02 09:13:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:13:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:13:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:13:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-02 09:13:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:13:02,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798929137] [2024-02-02 09:13:02,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798929137] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:13:02,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:13:02,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:13:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738433231] [2024-02-02 09:13:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:13:02,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:13:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:13:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:13:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:13:02,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 141 [2024-02-02 09:13:02,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 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) [2024-02-02 09:13:02,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:13:02,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 141 [2024-02-02 09:13:02,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:13:06,635 INFO L124 PetriNetUnfolderBase]: 20254/41179 cut-off events. [2024-02-02 09:13:06,636 INFO L125 PetriNetUnfolderBase]: For 4900/4900 co-relation queries the response was YES. [2024-02-02 09:13:06,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73046 conditions, 41179 events. 20254/41179 cut-off events. For 4900/4900 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 439516 event pairs, 8318 based on Foata normal form. 1750/38768 useless extension candidates. Maximal degree in co-relation 73027. Up to 23932 conditions per place. [2024-02-02 09:13:07,048 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 67 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2024-02-02 09:13:07,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 122 transitions, 496 flow [2024-02-02 09:13:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:13:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:13:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2024-02-02 09:13:07,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7641843971631206 [2024-02-02 09:13:07,052 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 255 flow. Second operand 4 states and 431 transitions. [2024-02-02 09:13:07,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 122 transitions, 496 flow [2024-02-02 09:13:07,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:13:07,069 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 241 flow [2024-02-02 09:13:07,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-02-02 09:13:07,078 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -4 predicate places. [2024-02-02 09:13:07,079 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 241 flow [2024-02-02 09:13:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 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) [2024-02-02 09:13:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:13:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:13:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 09:13:07,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-02 09:13:07,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:13:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1715573897, now seen corresponding path program 1 times [2024-02-02 09:13:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:13:07,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831668456] [2024-02-02 09:13:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:13:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:13:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:13:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:13:07,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:13:07,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831668456] [2024-02-02 09:13:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831668456] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:13:07,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:13:07,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:13:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279532614] [2024-02-02 09:13:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:13:07,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:13:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:13:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:13:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:13:07,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 141 [2024-02-02 09:13:07,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2024-02-02 09:13:07,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:13:07,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 141 [2024-02-02 09:13:07,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand