./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.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/circular_buffer_bad.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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-deagle/circular_buffer_bad.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_bad.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:28:05,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:28:05,910 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:28:05,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:28:05,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:28:05,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:28:05,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:28:05,948 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:28:05,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:28:05,952 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:28:05,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:28:05,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:28:05,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:28:05,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:28:05,956 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:28:05,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:28:05,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:28:05,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:28:05,957 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:28:05,957 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:28:05,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:28:05,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:28:05,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:28:05,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:28:05,959 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:28:05,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:28:05,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:28:05,960 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:28:05,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:28:05,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:28:05,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:28:05,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:28:05,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:28:05,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:28:05,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:28:05,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:28:05,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:28:05,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:28:05,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:28:05,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:28:05,964 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:28:05,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:28:05,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:28:05,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:28:06,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:28:06,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:28:06,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:28:06,244 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:28:06,244 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:28:06,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-31 16:28:07,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:28:07,587 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:28:07,587 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-31 16:28:07,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af834a0d2/6e1f68e1b80d43268e2c64d2563224f3/FLAG9d784e487 [2024-01-31 16:28:07,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af834a0d2/6e1f68e1b80d43268e2c64d2563224f3 [2024-01-31 16:28:07,617 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:28:07,618 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:28:07,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_bad.yml/witness.yml [2024-01-31 16:28:07,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:28:07,791 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:28:07,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:28:07,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:28:07,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:28:07,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:28:07" (1/2) ... [2024-01-31 16:28:07,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d80819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:28:07, skipping insertion in model container [2024-01-31 16:28:07,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:28:07" (1/2) ... [2024-01-31 16:28:07,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5da39411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:28:07, skipping insertion in model container [2024-01-31 16:28:07,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:28:07" (2/2) ... [2024-01-31 16:28:07,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d80819 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:07, skipping insertion in model container [2024-01-31 16:28:07,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:28:07" (2/2) ... [2024-01-31 16:28:07,802 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:28:07,978 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:28:07,979 INFO L98 nessWitnessExtractor]: Location invariant before [L690-L690] (((10 == max) && (send == (_Bool)0)) && (receive == (_Bool)0)) && (max == 10) [2024-01-31 16:28:07,980 INFO L98 nessWitnessExtractor]: Location invariant before [L759-L759] (send == (_Bool)0) && (receive == (_Bool)0) [2024-01-31 16:28:07,980 INFO L98 nessWitnessExtractor]: Location invariant before [L752-L752] (i == 7) && ((unsigned long )arg == 0UL) [2024-01-31 16:28:07,980 INFO L98 nessWitnessExtractor]: Location invariant before [L717-L717] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,981 INFO L98 nessWitnessExtractor]: Location invariant before [L761-L761] (send == (_Bool)1) && (receive == (_Bool)0) [2024-01-31 16:28:07,981 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] (((10 == max) && (send == (_Bool)0)) && (receive == (_Bool)0)) && (max == 10) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Location invariant before [L726-L726] ((unsigned long )arg == 0UL) && ((((((i == 6 || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Location invariant before [L702-L702] (receive == (_Bool)1) && (send == (_Bool)0 || send == (_Bool)1) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Location invariant before [L719-L719] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Location invariant before [L746-L746] (((receive == (_Bool)1) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Location invariant before [L727-L727] ((((unsigned long )arg == 0UL) && (send == (_Bool)0 || send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((i == 6 || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-31 16:28:07,982 INFO L98 nessWitnessExtractor]: Loop invariant at [L724-L724] (unsigned long )arg == 0UL [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L697-L697] (receive == (_Bool)1) && (send == (_Bool)0 || send == (_Bool)1) [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L742-L742] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L709-L709] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L695-L695] (receive == (_Bool)1) && (send == (_Bool)0 || send == (_Bool)1) [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L730-L730] (((send == (_Bool)1) && ((unsigned long )arg == 0UL)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || i == 6) [2024-01-31 16:28:07,983 INFO L98 nessWitnessExtractor]: Location invariant before [L712-L712] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,984 INFO L98 nessWitnessExtractor]: Location invariant before [L757-L757] (send == (_Bool)0) && (receive == (_Bool)0) [2024-01-31 16:28:07,984 INFO L98 nessWitnessExtractor]: Location invariant before [L731-L731] (((send == (_Bool)0) && ((unsigned long )arg == 0UL)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || i == 6) [2024-01-31 16:28:07,984 INFO L98 nessWitnessExtractor]: Location invariant before [L760-L760] (send == (_Bool)1) && (receive == (_Bool)0) [2024-01-31 16:28:07,984 INFO L98 nessWitnessExtractor]: Location invariant before [L750-L750] (((receive == (_Bool)0) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant before [L758-L758] (send == (_Bool)0) && (receive == (_Bool)0) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant after [L746-L746] (((receive == (_Bool)1) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant before [L747-L747] (((receive == (_Bool)1) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || ((((-128 <= i && 5 <= i) && i <= 6) && i <= 127) && (((((((i == -1 || i == 0) || i == 1) || i == 2) || i == 3) || i == 4) || i == 5) || i == 6))) || i == 4) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant before [L729-L729] (((send == (_Bool)1) && ((unsigned long )arg == 0UL)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || i == 6) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant before [L735-L735] (i == 7) && ((unsigned long )arg == 0UL) [2024-01-31 16:28:07,985 INFO L98 nessWitnessExtractor]: Location invariant before [L748-L748] (((receive == (_Bool)0) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || ((((-128 <= i && 5 <= i) && i <= 6) && i <= 127) && (((((((i == -1 || i == 0) || i == 1) || i == 2) || i == 3) || i == 4) || i == 5) || i == 6))) || i == 4) [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Location invariant before [L743-L743] ((((unsigned long )arg == 0UL) && (send == (_Bool)0 || send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Loop invariant at [L740-L740] (unsigned long )arg == 0UL [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Location invariant before [L698-L698] (receive == (_Bool)1) && (send == (_Bool)0 || send == (_Bool)1) [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Location invariant before [L710-L710] (((((0 <= b) && (b <= 6)) && (b <= 127)) && (send == (_Bool)1)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((b == 0 || b == 1) || b == 2) || b == 3) || b == 4) || b == 5) || b == 6) [2024-01-31 16:28:07,986 INFO L98 nessWitnessExtractor]: Location invariant before [L745-L745] (((receive == (_Bool)1) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && ((((((((((i == 3 || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || (5 <= i && i <= 6)) || i == 4) || i == 4) [2024-01-31 16:28:07,987 INFO L98 nessWitnessExtractor]: Location invariant before [L733-L733] (((send == (_Bool)0) && ((unsigned long )arg == 0UL)) && (receive == (_Bool)0 || receive == (_Bool)1)) && ((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || i == 6) [2024-01-31 16:28:08,034 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:28:08,369 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-deagle/circular_buffer_bad.i[30440,30453] [2024-01-31 16:28:08,381 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-deagle/circular_buffer_bad.i[30895,30908] [2024-01-31 16:28:08,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:28:08,413 INFO L204 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 Start Parsing Local Start Parsing Local [2024-01-31 16:28:08,489 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-deagle/circular_buffer_bad.i[30440,30453] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:28:08,542 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-deagle/circular_buffer_bad.i[30895,30908] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:28:08,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:28:08,622 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:28:08,623 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08 WrapperNode [2024-01-31 16:28:08,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:28:08,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:28:08,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:28:08,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:28:08,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,702 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2024-01-31 16:28:08,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:28:08,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:28:08,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:28:08,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:28:08,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,749 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 3, 8, 2, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 0, 1, 1]. [2024-01-31 16:28:08,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,772 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:28:08,780 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:28:08,780 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:28:08,780 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:28:08,781 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (1/1) ... [2024-01-31 16:28:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:28:08,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:28:08,812 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) [2024-01-31 16:28:08,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:28:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-31 16:28:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:28:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:28:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:28:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-01-31 16:28:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-01-31 16:28:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-01-31 16:28:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-01-31 16:28:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-31 16:28:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:28:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:28:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:28:08,855 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:28:09,038 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:28:09,041 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:28:09,514 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:28:09,514 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:28:09,665 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:28:09,665 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:28:09,666 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:28:09 BoogieIcfgContainer [2024-01-31 16:28:09,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:28:09,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:28:09,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:28:09,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:28:09,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:28:07" (1/4) ... [2024-01-31 16:28:09,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368af7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:28:09, skipping insertion in model container [2024-01-31 16:28:09,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:28:07" (2/4) ... [2024-01-31 16:28:09,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368af7c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:28:09, skipping insertion in model container [2024-01-31 16:28:09,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:28:08" (3/4) ... [2024-01-31 16:28:09,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368af7c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:28:09, skipping insertion in model container [2024-01-31 16:28:09,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:28:09" (4/4) ... [2024-01-31 16:28:09,676 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-01-31 16:28:09,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:28:09,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2024-01-31 16:28:09,692 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:28:09,791 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:28:09,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 111 transitions, 236 flow [2024-01-31 16:28:09,876 INFO L124 PetriNetUnfolderBase]: 8/109 cut-off events. [2024-01-31 16:28:09,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:28:09,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 8/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 339 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2024-01-31 16:28:09,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 111 transitions, 236 flow [2024-01-31 16:28:09,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 107 transitions, 223 flow [2024-01-31 16:28:09,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:28:09,903 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;@ee816fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:28:09,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2024-01-31 16:28:09,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:28:09,907 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:28:09,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:28:09,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:09,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:28:09,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:09,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash 14018, now seen corresponding path program 1 times [2024-01-31 16:28:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819663153] [2024-01-31 16:28:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819663153] [2024-01-31 16:28:10,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819663153] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:10,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:10,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:28:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689299172] [2024-01-31 16:28:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:28:10,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:28:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:28:10,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-01-31 16:28:10,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2024-01-31 16:28:10,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:10,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-01-31 16:28:10,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:11,034 INFO L124 PetriNetUnfolderBase]: 1108/2675 cut-off events. [2024-01-31 16:28:11,035 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-01-31 16:28:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 2675 events. 1108/2675 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19195 event pairs, 888 based on Foata normal form. 72/2503 useless extension candidates. Maximal degree in co-relation 4290. Up to 1777 conditions per place. [2024-01-31 16:28:11,056 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 49 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-01-31 16:28:11,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 102 transitions, 315 flow [2024-01-31 16:28:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:28:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:28:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2024-01-31 16:28:11,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6456456456456456 [2024-01-31 16:28:11,071 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 223 flow. Second operand 3 states and 215 transitions. [2024-01-31 16:28:11,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 102 transitions, 315 flow [2024-01-31 16:28:11,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:28:11,085 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 212 flow [2024-01-31 16:28:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2024-01-31 16:28:11,093 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -4 predicate places. [2024-01-31 16:28:11,093 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 212 flow [2024-01-31 16:28:11,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2024-01-31 16:28:11,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:11,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:28:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:28:11,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:11,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 13487389, now seen corresponding path program 1 times [2024-01-31 16:28:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050661099] [2024-01-31 16:28:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:11,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050661099] [2024-01-31 16:28:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050661099] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:11,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:11,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:28:11,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220284712] [2024-01-31 16:28:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:11,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:11,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:11,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 111 [2024-01-31 16:28:11,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2024-01-31 16:28:11,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:11,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 111 [2024-01-31 16:28:11,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:11,757 INFO L124 PetriNetUnfolderBase]: 1108/2673 cut-off events. [2024-01-31 16:28:11,757 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 16:28:11,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4492 conditions, 2673 events. 1108/2673 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19217 event pairs, 888 based on Foata normal form. 0/2429 useless extension candidates. Maximal degree in co-relation 4475. Up to 1777 conditions per place. [2024-01-31 16:28:11,771 INFO L140 encePairwiseOnDemand]: 105/111 looper letters, 47 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2024-01-31 16:28:11,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 310 flow [2024-01-31 16:28:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2024-01-31 16:28:11,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788288288288288 [2024-01-31 16:28:11,774 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 212 flow. Second operand 4 states and 257 transitions. [2024-01-31 16:28:11,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 310 flow [2024-01-31 16:28:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:11,777 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 212 flow [2024-01-31 16:28:11,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2024-01-31 16:28:11,778 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2024-01-31 16:28:11,778 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 212 flow [2024-01-31 16:28:11,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2024-01-31 16:28:11,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:11,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:11,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:28:11,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:11,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1923675306, now seen corresponding path program 1 times [2024-01-31 16:28:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:11,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146486627] [2024-01-31 16:28:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:11,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146486627] [2024-01-31 16:28:11,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146486627] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:11,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:11,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:28:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057365437] [2024-01-31 16:28:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:11,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:11,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:11,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-01-31 16:28:11,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 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) [2024-01-31 16:28:11,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:11,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-01-31 16:28:11,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:12,538 INFO L124 PetriNetUnfolderBase]: 1723/4338 cut-off events. [2024-01-31 16:28:12,539 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-31 16:28:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7209 conditions, 4338 events. 1723/4338 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 31972 event pairs, 556 based on Foata normal form. 44/3964 useless extension candidates. Maximal degree in co-relation 7190. Up to 1410 conditions per place. [2024-01-31 16:28:12,562 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 99 selfloop transitions, 9 changer transitions 0/154 dead transitions. [2024-01-31 16:28:12,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 154 transitions, 542 flow [2024-01-31 16:28:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-01-31 16:28:12,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7364864864864865 [2024-01-31 16:28:12,567 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 212 flow. Second operand 4 states and 327 transitions. [2024-01-31 16:28:12,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 154 transitions, 542 flow [2024-01-31 16:28:12,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 154 transitions, 534 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:28:12,572 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 264 flow [2024-01-31 16:28:12,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2024-01-31 16:28:12,574 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -4 predicate places. [2024-01-31 16:28:12,574 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 264 flow [2024-01-31 16:28:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 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) [2024-01-31 16:28:12,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:12,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:28:12,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:12,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1434267197, now seen corresponding path program 1 times [2024-01-31 16:28:12,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:12,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084360193] [2024-01-31 16:28:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:12,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084360193] [2024-01-31 16:28:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084360193] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:12,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:12,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:28:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702294208] [2024-01-31 16:28:12,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:12,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 111 [2024-01-31 16:28:12,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2024-01-31 16:28:12,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:12,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 111 [2024-01-31 16:28:12,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:13,186 INFO L124 PetriNetUnfolderBase]: 1355/3925 cut-off events. [2024-01-31 16:28:13,189 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-01-31 16:28:13,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6684 conditions, 3925 events. 1355/3925 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 30593 event pairs, 416 based on Foata normal form. 0/3458 useless extension candidates. Maximal degree in co-relation 6288. Up to 2153 conditions per place. [2024-01-31 16:28:13,218 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 56 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-01-31 16:28:13,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 112 transitions, 400 flow [2024-01-31 16:28:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2024-01-31 16:28:13,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6756756756756757 [2024-01-31 16:28:13,222 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 264 flow. Second operand 4 states and 300 transitions. [2024-01-31 16:28:13,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 112 transitions, 400 flow [2024-01-31 16:28:13,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 112 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:28:13,229 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 266 flow [2024-01-31 16:28:13,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2024-01-31 16:28:13,231 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2024-01-31 16:28:13,232 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 266 flow [2024-01-31 16:28:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2024-01-31 16:28:13,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:13,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:28:13,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:13,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 351322990, now seen corresponding path program 1 times [2024-01-31 16:28:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487630344] [2024-01-31 16:28:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:13,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:13,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487630344] [2024-01-31 16:28:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487630344] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:13,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:13,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:28:13,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308670457] [2024-01-31 16:28:13,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:13,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:13,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:13,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 111 [2024-01-31 16:28:13,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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) [2024-01-31 16:28:13,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:13,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 111 [2024-01-31 16:28:13,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:13,827 INFO L124 PetriNetUnfolderBase]: 1324/3602 cut-off events. [2024-01-31 16:28:13,828 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-01-31 16:28:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6416 conditions, 3602 events. 1324/3602 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 27032 event pairs, 71 based on Foata normal form. 0/3238 useless extension candidates. Maximal degree in co-relation 6110. Up to 1937 conditions per place. [2024-01-31 16:28:13,846 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 83 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2024-01-31 16:28:13,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 541 flow [2024-01-31 16:28:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 323 transitions. [2024-01-31 16:28:13,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7274774774774775 [2024-01-31 16:28:13,849 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 266 flow. Second operand 4 states and 323 transitions. [2024-01-31 16:28:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 541 flow [2024-01-31 16:28:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 138 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:13,855 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 265 flow [2024-01-31 16:28:13,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=265, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2024-01-31 16:28:13,857 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2024-01-31 16:28:13,857 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 265 flow [2024-01-31 16:28:13,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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) [2024-01-31 16:28:13,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:13,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:13,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:28:13,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:13,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash 353742438, now seen corresponding path program 1 times [2024-01-31 16:28:13,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:13,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231520395] [2024-01-31 16:28:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:13,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:13,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231520395] [2024-01-31 16:28:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231520395] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:13,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:13,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:28:13,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810986681] [2024-01-31 16:28:13,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:13,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:28:13,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:28:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:28:13,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 111 [2024-01-31 16:28:13,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2024-01-31 16:28:13,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:13,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 111 [2024-01-31 16:28:13,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:14,499 INFO L124 PetriNetUnfolderBase]: 1740/4856 cut-off events. [2024-01-31 16:28:14,499 INFO L125 PetriNetUnfolderBase]: For 423/433 co-relation queries the response was YES. [2024-01-31 16:28:14,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 4856 events. 1740/4856 cut-off events. For 423/433 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 39464 event pairs, 855 based on Foata normal form. 32/4348 useless extension candidates. Maximal degree in co-relation 8208. Up to 2183 conditions per place. [2024-01-31 16:28:14,524 INFO L140 encePairwiseOnDemand]: 107/111 looper letters, 77 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2024-01-31 16:28:14,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 505 flow [2024-01-31 16:28:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:28:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:28:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-01-31 16:28:14,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747747747747747 [2024-01-31 16:28:14,526 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 265 flow. Second operand 3 states and 258 transitions. [2024-01-31 16:28:14,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 505 flow [2024-01-31 16:28:14,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 131 transitions, 499 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:14,529 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 276 flow [2024-01-31 16:28:14,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-01-31 16:28:14,530 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -1 predicate places. [2024-01-31 16:28:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 276 flow [2024-01-31 16:28:14,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2024-01-31 16:28:14,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:14,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:14,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:28:14,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:14,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1681004847, now seen corresponding path program 1 times [2024-01-31 16:28:14,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:14,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358150106] [2024-01-31 16:28:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:14,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:14,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:14,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358150106] [2024-01-31 16:28:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358150106] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:14,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:14,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:28:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247217403] [2024-01-31 16:28:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:28:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:28:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:28:14,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 111 [2024-01-31 16:28:14,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2024-01-31 16:28:14,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:14,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 111 [2024-01-31 16:28:14,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:15,375 INFO L124 PetriNetUnfolderBase]: 2705/7617 cut-off events. [2024-01-31 16:28:15,375 INFO L125 PetriNetUnfolderBase]: For 756/798 co-relation queries the response was YES. [2024-01-31 16:28:15,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13874 conditions, 7617 events. 2705/7617 cut-off events. For 756/798 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 68868 event pairs, 1402 based on Foata normal form. 100/6995 useless extension candidates. Maximal degree in co-relation 13495. Up to 2965 conditions per place. [2024-01-31 16:28:15,416 INFO L140 encePairwiseOnDemand]: 107/111 looper letters, 82 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-01-31 16:28:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 550 flow [2024-01-31 16:28:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:28:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:28:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-01-31 16:28:15,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747747747747747 [2024-01-31 16:28:15,419 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 276 flow. Second operand 3 states and 258 transitions. [2024-01-31 16:28:15,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 550 flow [2024-01-31 16:28:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 136 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:28:15,423 INFO L231 Difference]: Finished difference. Result has 107 places, 103 transitions, 288 flow [2024-01-31 16:28:15,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=107, PETRI_TRANSITIONS=103} [2024-01-31 16:28:15,424 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2024-01-31 16:28:15,424 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 103 transitions, 288 flow [2024-01-31 16:28:15,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2024-01-31 16:28:15,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:15,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:28:15,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:15,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1508248595, now seen corresponding path program 1 times [2024-01-31 16:28:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:15,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518227363] [2024-01-31 16:28:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518227363] [2024-01-31 16:28:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518227363] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:15,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:15,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:28:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116147771] [2024-01-31 16:28:15,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:28:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:28:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:28:15,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-01-31 16:28:15,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 103 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-01-31 16:28:15,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:15,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-01-31 16:28:15,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:16,998 INFO L124 PetriNetUnfolderBase]: 5037/11617 cut-off events. [2024-01-31 16:28:16,998 INFO L125 PetriNetUnfolderBase]: For 2757/2837 co-relation queries the response was YES. [2024-01-31 16:28:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23669 conditions, 11617 events. 5037/11617 cut-off events. For 2757/2837 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 101235 event pairs, 1259 based on Foata normal form. 60/11049 useless extension candidates. Maximal degree in co-relation 23218. Up to 3690 conditions per place. [2024-01-31 16:28:17,055 INFO L140 encePairwiseOnDemand]: 100/111 looper letters, 135 selfloop transitions, 16 changer transitions 0/189 dead transitions. [2024-01-31 16:28:17,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 189 transitions, 856 flow [2024-01-31 16:28:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:28:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:28:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2024-01-31 16:28:17,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-31 16:28:17,057 INFO L175 Difference]: Start difference. First operand has 107 places, 103 transitions, 288 flow. Second operand 5 states and 370 transitions. [2024-01-31 16:28:17,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 189 transitions, 856 flow [2024-01-31 16:28:17,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 848 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:28:17,063 INFO L231 Difference]: Finished difference. Result has 113 places, 114 transitions, 413 flow [2024-01-31 16:28:17,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=113, PETRI_TRANSITIONS=114} [2024-01-31 16:28:17,064 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 7 predicate places. [2024-01-31 16:28:17,064 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 114 transitions, 413 flow [2024-01-31 16:28:17,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-01-31 16:28:17,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:17,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:17,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:28:17,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:17,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 503843406, now seen corresponding path program 1 times [2024-01-31 16:28:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:17,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573471120] [2024-01-31 16:28:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573471120] [2024-01-31 16:28:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573471120] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:17,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:28:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510880850] [2024-01-31 16:28:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:28:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:28:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:28:17,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-01-31 16:28:17,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 114 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2024-01-31 16:28:17,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:17,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-01-31 16:28:17,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:18,695 INFO L124 PetriNetUnfolderBase]: 5517/12365 cut-off events. [2024-01-31 16:28:18,695 INFO L125 PetriNetUnfolderBase]: For 5681/5797 co-relation queries the response was YES. [2024-01-31 16:28:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26955 conditions, 12365 events. 5517/12365 cut-off events. For 5681/5797 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 105541 event pairs, 1925 based on Foata normal form. 48/11922 useless extension candidates. Maximal degree in co-relation 26469. Up to 3802 conditions per place. [2024-01-31 16:28:18,763 INFO L140 encePairwiseOnDemand]: 100/111 looper letters, 133 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2024-01-31 16:28:18,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 936 flow [2024-01-31 16:28:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:28:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:28:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2024-01-31 16:28:18,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-01-31 16:28:18,765 INFO L175 Difference]: Start difference. First operand has 113 places, 114 transitions, 413 flow. Second operand 5 states and 369 transitions. [2024-01-31 16:28:18,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 936 flow [2024-01-31 16:28:18,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 936 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:28:18,773 INFO L231 Difference]: Finished difference. Result has 119 places, 117 transitions, 493 flow [2024-01-31 16:28:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=119, PETRI_TRANSITIONS=117} [2024-01-31 16:28:18,774 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 13 predicate places. [2024-01-31 16:28:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 493 flow [2024-01-31 16:28:18,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2024-01-31 16:28:18,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:18,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:28:18,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1714486476, now seen corresponding path program 1 times [2024-01-31 16:28:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349282056] [2024-01-31 16:28:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:18,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349282056] [2024-01-31 16:28:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349282056] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:18,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:18,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:28:18,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100267549] [2024-01-31 16:28:18,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:18,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:28:18,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:28:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:28:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 111 [2024-01-31 16:28:19,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 117 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 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) [2024-01-31 16:28:19,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:19,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 111 [2024-01-31 16:28:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:20,414 INFO L124 PetriNetUnfolderBase]: 5573/11913 cut-off events. [2024-01-31 16:28:20,414 INFO L125 PetriNetUnfolderBase]: For 10308/10490 co-relation queries the response was YES. [2024-01-31 16:28:20,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28415 conditions, 11913 events. 5573/11913 cut-off events. For 10308/10490 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 97817 event pairs, 1097 based on Foata normal form. 0/10673 useless extension candidates. Maximal degree in co-relation 27927. Up to 2988 conditions per place. [2024-01-31 16:28:20,469 INFO L140 encePairwiseOnDemand]: 96/111 looper letters, 151 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-01-31 16:28:20,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 206 transitions, 1112 flow [2024-01-31 16:28:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:28:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:28:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2024-01-31 16:28:20,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6441441441441441 [2024-01-31 16:28:20,472 INFO L175 Difference]: Start difference. First operand has 119 places, 117 transitions, 493 flow. Second operand 6 states and 429 transitions. [2024-01-31 16:28:20,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 206 transitions, 1112 flow [2024-01-31 16:28:20,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 1094 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:20,484 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 542 flow [2024-01-31 16:28:20,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2024-01-31 16:28:20,486 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2024-01-31 16:28:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 542 flow [2024-01-31 16:28:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 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) [2024-01-31 16:28:20,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:20,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:20,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:28:20,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:20,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1880362664, now seen corresponding path program 1 times [2024-01-31 16:28:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191055925] [2024-01-31 16:28:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:20,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191055925] [2024-01-31 16:28:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191055925] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:28:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487091301] [2024-01-31 16:28:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:20,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:28:20,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:28:20,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:28:20,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:28:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:20,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:28:20,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:28:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:20,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:28:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487091301] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:28:21,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:28:21,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:28:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884352573] [2024-01-31 16:28:21,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:28:21,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:28:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:28:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:28:21,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-01-31 16:28:21,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 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) [2024-01-31 16:28:21,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:21,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-01-31 16:28:21,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:23,446 INFO L124 PetriNetUnfolderBase]: 7965/17841 cut-off events. [2024-01-31 16:28:23,446 INFO L125 PetriNetUnfolderBase]: For 15716/16008 co-relation queries the response was YES. [2024-01-31 16:28:23,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42860 conditions, 17841 events. 7965/17841 cut-off events. For 15716/16008 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 158181 event pairs, 1059 based on Foata normal form. 778/17952 useless extension candidates. Maximal degree in co-relation 42135. Up to 3178 conditions per place. [2024-01-31 16:28:23,538 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 263 selfloop transitions, 8 changer transitions 0/319 dead transitions. [2024-01-31 16:28:23,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 319 transitions, 2175 flow [2024-01-31 16:28:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:28:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:28:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 583 transitions. [2024-01-31 16:28:23,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7503217503217503 [2024-01-31 16:28:23,541 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 542 flow. Second operand 7 states and 583 transitions. [2024-01-31 16:28:23,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 319 transitions, 2175 flow [2024-01-31 16:28:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 319 transitions, 2033 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-31 16:28:23,587 INFO L231 Difference]: Finished difference. Result has 129 places, 121 transitions, 546 flow [2024-01-31 16:28:23,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2024-01-31 16:28:23,588 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 23 predicate places. [2024-01-31 16:28:23,588 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 546 flow [2024-01-31 16:28:23,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 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) [2024-01-31 16:28:23,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:23,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:23,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:28:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 16:28:23,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err12ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:23,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2014212730, now seen corresponding path program 1 times [2024-01-31 16:28:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:23,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258862206] [2024-01-31 16:28:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258862206] [2024-01-31 16:28:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258862206] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:23,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:23,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:28:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144757299] [2024-01-31 16:28:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:28:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:28:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:28:24,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-01-31 16:28:24,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 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) [2024-01-31 16:28:24,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:24,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-01-31 16:28:24,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:26,547 INFO L124 PetriNetUnfolderBase]: 9817/22585 cut-off events. [2024-01-31 16:28:26,547 INFO L125 PetriNetUnfolderBase]: For 17884/17898 co-relation queries the response was YES. [2024-01-31 16:28:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54595 conditions, 22585 events. 9817/22585 cut-off events. For 17884/17898 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 211480 event pairs, 3221 based on Foata normal form. 54/21885 useless extension candidates. Maximal degree in co-relation 53888. Up to 7456 conditions per place. [2024-01-31 16:28:26,653 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 141 selfloop transitions, 14 changer transitions 0/194 dead transitions. [2024-01-31 16:28:26,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 194 transitions, 1169 flow [2024-01-31 16:28:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:28:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:28:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 359 transitions. [2024-01-31 16:28:26,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468468468468469 [2024-01-31 16:28:26,655 INFO L175 Difference]: Start difference. First operand has 129 places, 121 transitions, 546 flow. Second operand 5 states and 359 transitions. [2024-01-31 16:28:26,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 194 transitions, 1169 flow [2024-01-31 16:28:26,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 1132 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:26,698 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 573 flow [2024-01-31 16:28:26,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2024-01-31 16:28:26,699 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 26 predicate places. [2024-01-31 16:28:26,699 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 573 flow [2024-01-31 16:28:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 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) [2024-01-31 16:28:26,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:26,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:28:26,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err13ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1983914272, now seen corresponding path program 1 times [2024-01-31 16:28:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:26,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672200820] [2024-01-31 16:28:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:26,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:26,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672200820] [2024-01-31 16:28:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672200820] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:26,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:28:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752362313] [2024-01-31 16:28:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:26,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 111 [2024-01-31 16:28:26,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 573 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2024-01-31 16:28:26,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:26,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 111 [2024-01-31 16:28:26,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:29,353 INFO L124 PetriNetUnfolderBase]: 9700/21479 cut-off events. [2024-01-31 16:28:29,353 INFO L125 PetriNetUnfolderBase]: For 19555/19695 co-relation queries the response was YES. [2024-01-31 16:28:29,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53456 conditions, 21479 events. 9700/21479 cut-off events. For 19555/19695 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 196687 event pairs, 5584 based on Foata normal form. 172/20279 useless extension candidates. Maximal degree in co-relation 52754. Up to 13203 conditions per place. [2024-01-31 16:28:29,459 INFO L140 encePairwiseOnDemand]: 100/111 looper letters, 130 selfloop transitions, 5 changer transitions 0/173 dead transitions. [2024-01-31 16:28:29,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 173 transitions, 1052 flow [2024-01-31 16:28:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2024-01-31 16:28:29,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869369369369369 [2024-01-31 16:28:29,462 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 573 flow. Second operand 4 states and 305 transitions. [2024-01-31 16:28:29,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 173 transitions, 1052 flow [2024-01-31 16:28:29,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 173 transitions, 1037 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:29,510 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 601 flow [2024-01-31 16:28:29,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=601, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2024-01-31 16:28:29,511 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 28 predicate places. [2024-01-31 16:28:29,511 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 601 flow [2024-01-31 16:28:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2024-01-31 16:28:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:29,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:28:29,512 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2014422215, now seen corresponding path program 1 times [2024-01-31 16:28:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976297475] [2024-01-31 16:28:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:29,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 16:28:29,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389128237] [2024-01-31 16:28:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:29,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:28:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:28:29,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:28:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:28:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:29,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:28:29,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:28:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:29,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:28:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976297475] [2024-01-31 16:28:29,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 16:28:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389128237] [2024-01-31 16:28:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389128237] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:28:29,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:28:29,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:28:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870420211] [2024-01-31 16:28:29,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:28:29,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:28:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:28:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:28:33,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-01-31 16:28:33,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 111 [2024-01-31 16:28:33,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 601 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:28:33,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:33,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 111 [2024-01-31 16:28:33,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:37,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-01-31 16:28:39,077 INFO L124 PetriNetUnfolderBase]: 11271/28352 cut-off events. [2024-01-31 16:28:39,077 INFO L125 PetriNetUnfolderBase]: For 20320/20568 co-relation queries the response was YES. [2024-01-31 16:28:39,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69081 conditions, 28352 events. 11271/28352 cut-off events. For 20320/20568 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 296591 event pairs, 4682 based on Foata normal form. 0/27240 useless extension candidates. Maximal degree in co-relation 68349. Up to 9439 conditions per place. [2024-01-31 16:28:39,210 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 151 selfloop transitions, 2 changer transitions 0/205 dead transitions. [2024-01-31 16:28:39,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 205 transitions, 1365 flow [2024-01-31 16:28:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:28:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:28:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 336 transitions. [2024-01-31 16:28:39,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2024-01-31 16:28:39,212 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 601 flow. Second operand 4 states and 336 transitions. [2024-01-31 16:28:39,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 205 transitions, 1365 flow [2024-01-31 16:28:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 205 transitions, 1351 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 16:28:39,290 INFO L231 Difference]: Finished difference. Result has 135 places, 124 transitions, 604 flow [2024-01-31 16:28:39,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=604, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2024-01-31 16:28:39,290 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 29 predicate places. [2024-01-31 16:28:39,290 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 604 flow [2024-01-31 16:28:39,291 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) [2024-01-31 16:28:39,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:39,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:39,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:28:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:28:39,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:39,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1374887527, now seen corresponding path program 1 times [2024-01-31 16:28:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508959642] [2024-01-31 16:28:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508959642] [2024-01-31 16:28:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508959642] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:28:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552580891] [2024-01-31 16:28:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:28:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:28:39,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:28:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:28:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:39,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:28:39,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:28:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:40,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:28:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552580891] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:28:41,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:28:41,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2024-01-31 16:28:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76749636] [2024-01-31 16:28:41,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:28:41,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:28:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:28:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:28:41,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 111 [2024-01-31 16:28:41,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 604 flow. Second operand has 13 states, 13 states have (on average 44.76923076923077) internal successors, (582), 13 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:28:41,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:41,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 111 [2024-01-31 16:28:41,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:28:50,830 INFO L124 PetriNetUnfolderBase]: 38302/76449 cut-off events. [2024-01-31 16:28:50,830 INFO L125 PetriNetUnfolderBase]: For 58850/59570 co-relation queries the response was YES. [2024-01-31 16:28:51,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199770 conditions, 76449 events. 38302/76449 cut-off events. For 58850/59570 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 755081 event pairs, 4345 based on Foata normal form. 2796/78244 useless extension candidates. Maximal degree in co-relation 198816. Up to 12330 conditions per place. [2024-01-31 16:28:51,293 INFO L140 encePairwiseOnDemand]: 85/111 looper letters, 428 selfloop transitions, 109 changer transitions 0/569 dead transitions. [2024-01-31 16:28:51,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 569 transitions, 3541 flow [2024-01-31 16:28:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:28:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:28:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1275 transitions. [2024-01-31 16:28:51,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2024-01-31 16:28:51,297 INFO L175 Difference]: Start difference. First operand has 135 places, 124 transitions, 604 flow. Second operand 20 states and 1275 transitions. [2024-01-31 16:28:51,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 569 transitions, 3541 flow [2024-01-31 16:28:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 569 transitions, 3541 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:28:51,837 INFO L231 Difference]: Finished difference. Result has 170 places, 215 transitions, 1811 flow [2024-01-31 16:28:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1811, PETRI_PLACES=170, PETRI_TRANSITIONS=215} [2024-01-31 16:28:51,838 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 64 predicate places. [2024-01-31 16:28:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 215 transitions, 1811 flow [2024-01-31 16:28:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 44.76923076923077) internal successors, (582), 13 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:28:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:28:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:28:51,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:28:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:28:52,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 64 more)] === [2024-01-31 16:28:52,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:28:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash -671901914, now seen corresponding path program 1 times [2024-01-31 16:28:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:28:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203234871] [2024-01-31 16:28:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:28:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:52,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:28:52,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203234871] [2024-01-31 16:28:52,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203234871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:28:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831033628] [2024-01-31 16:28:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:28:52,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:28:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:28:52,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:28:52,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:28:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:28:52,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:28:52,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:28:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:52,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:28:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:28:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831033628] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:28:52,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:28:52,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:28:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112762095] [2024-01-31 16:28:52,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:28:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:28:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:28:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:28:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:28:53,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-01-31 16:28:53,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 215 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 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) [2024-01-31 16:28:53,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:28:53,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-01-31 16:28:53,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand