./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c --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/test-easy11.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ab2e0ac4 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy11.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-ab2e0ac-m [2024-01-29 14:20:31,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-29 14:20:31,521 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-29 14:20:31,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-29 14:20:31,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-29 14:20:31,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-29 14:20:31,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-29 14:20:31,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-29 14:20:31,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-29 14:20:31,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-29 14:20:31,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-29 14:20:31,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-29 14:20:31,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-29 14:20:31,554 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-29 14:20:31,554 INFO L153 SettingsManager]: * Use SBE=true [2024-01-29 14:20:31,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-29 14:20:31,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-29 14:20:31,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-29 14:20:31,555 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-29 14:20:31,555 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-29 14:20:31,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-29 14:20:31,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-29 14:20:31,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-29 14:20:31,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-29 14:20:31,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-29 14:20:31,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-29 14:20:31,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-29 14:20:31,557 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-29 14:20:31,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-29 14:20:31,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-29 14:20:31,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-29 14:20:31,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-29 14:20:31,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 14:20:31,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-29 14:20:31,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-29 14:20:31,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-29 14:20:31,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-29 14:20:31,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-29 14:20:31,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-29 14:20:31,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-29 14:20:31,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-29 14:20:31,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-29 14:20:31,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-29 14:20:31,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-29 14:20:31,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-29 14:20:31,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-29 14:20:31,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-29 14:20:31,788 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-29 14:20:31,789 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-29 14:20:31,790 INFO L431 ainManager$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/test-easy11.wvr.yml/witness.yml [2024-01-29 14:20:31,866 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-29 14:20:31,867 INFO L274 PluginConnector]: CDTParser initialized [2024-01-29 14:20:31,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-01-29 14:20:32,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-29 14:20:32,967 INFO L384 CDTParser]: Found 1 translation units. [2024-01-29 14:20:32,967 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-01-29 14:20:32,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b62a3483/740983f577024dcab8d66cd75898a054/FLAGdd670bf7f [2024-01-29 14:20:32,981 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b62a3483/740983f577024dcab8d66cd75898a054 [2024-01-29 14:20:32,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-29 14:20:32,983 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-29 14:20:32,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-29 14:20:32,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-29 14:20:32,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-29 14:20:32,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:20:31" (1/2) ... [2024-01-29 14:20:32,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106b407c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 02:20:32, skipping insertion in model container [2024-01-29 14:20:32,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:20:31" (1/2) ... [2024-01-29 14:20:32,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4831e75f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 02:20:32, skipping insertion in model container [2024-01-29 14:20:32,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 02:20:32" (2/2) ... [2024-01-29 14:20:32,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106b407c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:32, skipping insertion in model container [2024-01-29 14:20:32,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 02:20:32" (2/2) ... [2024-01-29 14:20:32,991 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-29 14:20:33,014 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-29 14:20:33,018 INFO L98 nessWitnessExtractor]: Location invariant before [L70-L70] Y == 0 [2024-01-29 14:20:33,018 INFO L98 nessWitnessExtractor]: Location invariant before [L73-L73] Y == 0 [2024-01-29 14:20:33,018 INFO L98 nessWitnessExtractor]: Location invariant before [L44-L44] x <= 9999 [2024-01-29 14:20:33,018 INFO L98 nessWitnessExtractor]: Location invariant before [L44-L44] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,018 INFO L98 nessWitnessExtractor]: Location invariant before [L46-L46] x != 0 [2024-01-29 14:20:33,019 INFO L98 nessWitnessExtractor]: Location invariant before [L46-L46] 10000 <= x [2024-01-29 14:20:33,019 INFO L98 nessWitnessExtractor]: Location invariant before [L46-L46] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,019 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] x <= 9999 [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] (0LL - (long long )X) + (long long )Y >= 0LL [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] (long long )X + (long long )Y >= 0LL [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] (0LL - (long long )X) - (long long )Y >= 0LL [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] (long long )X - (long long )Y >= 0LL [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] X == 0 [2024-01-29 14:20:33,020 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] Y == 0 [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L48-L48] 10000 <= x [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L48-L48] x != 0 [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L48-L48] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L48-L48] 10000 <= Y [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,021 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] 0 <= Y [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] x != 0 [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] 10000 <= x [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L61-L61] x != 0 [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L61-L61] 10000 <= x [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L61-L61] 10000 <= Y [2024-01-29 14:20:33,022 INFO L98 nessWitnessExtractor]: Location invariant before [L61-L61] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] x != 0 [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] 10000 <= x [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] x != 0 [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] 10000 <= x [2024-01-29 14:20:33,023 INFO L98 nessWitnessExtractor]: Location invariant before [L63-L63] 10000 <= x [2024-01-29 14:20:33,024 INFO L98 nessWitnessExtractor]: Location invariant before [L63-L63] x != 0 [2024-01-29 14:20:33,024 INFO L98 nessWitnessExtractor]: Location invariant before [L63-L63] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,024 INFO L98 nessWitnessExtractor]: Loop invariant at [L43-L45] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,024 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] (long long )X + (long long )Y >= 0LL [2024-01-29 14:20:33,025 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] (long long )X - (long long )Y >= 0LL [2024-01-29 14:20:33,025 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] Y == 0 [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] X == 0 [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] (0LL - (long long )X) + (long long )Y >= 0LL [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] (0LL - (long long )X) - (long long )Y >= 0LL [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Loop invariant at [L56-L58] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,026 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,027 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] 10000 <= x [2024-01-29 14:20:33,027 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] 0 <= Y [2024-01-29 14:20:33,027 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-01-29 14:20:33,027 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] x != 0 [2024-01-29 14:20:33,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-29 14:20:33,163 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2031,2044] [2024-01-29 14:20:33,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 14:20:33,173 INFO L202 MainTranslator]: Completed pre-run [2024-01-29 14:20:33,182 WARN L424 MainDispatcher]: Unable to annotate extern int pthread_create (pthread_t *__restrict __newthread, const pthread_attr_t *__restrict __attr, void *(*__start_routine) (void *), void *__restrict __arg) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 3))); with a witness entry 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 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 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 Start Parsing Local Start Parsing Local [2024-01-29 14:20:33,218 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2031,2044] [2024-01-29 14:20:33,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 14:20:33,229 INFO L206 MainTranslator]: Completed translation [2024-01-29 14:20:33,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33 WrapperNode [2024-01-29 14:20:33,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-29 14:20:33,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-29 14:20:33,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-29 14:20:33,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-29 14:20:33,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,258 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-01-29 14:20:33,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-29 14:20:33,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-29 14:20:33,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-29 14:20:33,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-29 14:20:33,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,269 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,284 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-29 14:20:33,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-29 14:20:33,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-29 14:20:33,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-29 14:20:33,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-29 14:20:33,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (1/1) ... [2024-01-29 14:20:33,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 14:20:33,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:33,362 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) [2024-01-29 14:20:33,379 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 [2024-01-29 14:20:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-29 14:20:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-29 14:20:33,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-29 14:20:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-29 14:20:33,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-29 14:20:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-29 14:20:33,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-29 14:20:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-29 14:20:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-29 14:20:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-29 14:20:33,429 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-29 14:20:33,508 INFO L244 CfgBuilder]: Building ICFG [2024-01-29 14:20:33,510 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-29 14:20:33,760 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-29 14:20:33,760 INFO L293 CfgBuilder]: Performing block encoding [2024-01-29 14:20:33,934 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-29 14:20:33,935 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-29 14:20:33,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 02:20:33 BoogieIcfgContainer [2024-01-29 14:20:33,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-29 14:20:33,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-29 14:20:33,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-29 14:20:33,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-29 14:20:33,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:20:31" (1/4) ... [2024-01-29 14:20:33,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307feb48 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 02:20:33, skipping insertion in model container [2024-01-29 14:20:33,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 02:20:32" (2/4) ... [2024-01-29 14:20:33,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307feb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 02:20:33, skipping insertion in model container [2024-01-29 14:20:33,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:20:33" (3/4) ... [2024-01-29 14:20:33,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307feb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 02:20:33, skipping insertion in model container [2024-01-29 14:20:33,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 02:20:33" (4/4) ... [2024-01-29 14:20:33,946 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2024-01-29 14:20:33,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-29 14:20:33,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2024-01-29 14:20:33,959 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-29 14:20:34,017 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-29 14:20:34,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 97 transitions, 208 flow [2024-01-29 14:20:34,106 INFO L124 PetriNetUnfolderBase]: 2/95 cut-off events. [2024-01-29 14:20:34,107 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 14:20:34,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 95 events. 2/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2024-01-29 14:20:34,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 97 transitions, 208 flow [2024-01-29 14:20:34,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 94 transitions, 200 flow [2024-01-29 14:20:34,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 14:20:34,128 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;@55f7dd7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 14:20:34,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2024-01-29 14:20:34,129 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 14:20:34,129 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-29 14:20:34,129 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 14:20:34,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:34,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-29 14:20:34,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash 12973, now seen corresponding path program 1 times [2024-01-29 14:20:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:34,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740439226] [2024-01-29 14:20:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:34,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740439226] [2024-01-29 14:20:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740439226] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:34,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:34,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 14:20:34,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491916305] [2024-01-29 14:20:34,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 97 [2024-01-29 14:20:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:34,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:34,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 97 [2024-01-29 14:20:34,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:34,611 INFO L124 PetriNetUnfolderBase]: 295/976 cut-off events. [2024-01-29 14:20:34,611 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-29 14:20:34,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 976 events. 295/976 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7361 event pairs, 167 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 1401. Up to 286 conditions per place. [2024-01-29 14:20:34,623 INFO L140 encePairwiseOnDemand]: 80/97 looper letters, 47 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2024-01-29 14:20:34,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 100 transitions, 315 flow [2024-01-29 14:20:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2024-01-29 14:20:34,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7869415807560137 [2024-01-29 14:20:34,635 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 200 flow. Second operand 3 states and 229 transitions. [2024-01-29 14:20:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 100 transitions, 315 flow [2024-01-29 14:20:34,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 305 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-29 14:20:34,645 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 189 flow [2024-01-29 14:20:34,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2024-01-29 14:20:34,655 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2024-01-29 14:20:34,655 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 189 flow [2024-01-29 14:20:34,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:34,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:34,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-29 14:20:34,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-29 14:20:34,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:34,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 402552, now seen corresponding path program 1 times [2024-01-29 14:20:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118137934] [2024-01-29 14:20:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:34,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:34,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118137934] [2024-01-29 14:20:34,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118137934] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:34,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:34,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 14:20:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464374011] [2024-01-29 14:20:34,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:34,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 97 [2024-01-29 14:20:34,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2024-01-29 14:20:34,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:34,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 97 [2024-01-29 14:20:34,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:34,825 INFO L124 PetriNetUnfolderBase]: 299/960 cut-off events. [2024-01-29 14:20:34,825 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-01-29 14:20:34,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 960 events. 299/960 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7251 event pairs, 273 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 856. Up to 511 conditions per place. [2024-01-29 14:20:34,831 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 32 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-01-29 14:20:34,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 255 flow [2024-01-29 14:20:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-01-29 14:20:34,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6701030927835051 [2024-01-29 14:20:34,836 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 189 flow. Second operand 3 states and 195 transitions. [2024-01-29 14:20:34,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 255 flow [2024-01-29 14:20:34,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:20:34,840 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 188 flow [2024-01-29 14:20:34,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-01-29 14:20:34,841 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2024-01-29 14:20:34,841 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 188 flow [2024-01-29 14:20:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2024-01-29 14:20:34,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:34,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-29 14:20:34,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-29 14:20:34,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 12479568, now seen corresponding path program 1 times [2024-01-29 14:20:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254289621] [2024-01-29 14:20:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:34,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254289621] [2024-01-29 14:20:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254289621] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:34,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:34,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 14:20:34,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698040743] [2024-01-29 14:20:34,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:34,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:34,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 97 [2024-01-29 14:20:34,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:34,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:34,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 97 [2024-01-29 14:20:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,052 INFO L124 PetriNetUnfolderBase]: 299/956 cut-off events. [2024-01-29 14:20:35,053 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-01-29 14:20:35,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 956 events. 299/956 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7254 event pairs, 273 based on Foata normal form. 4/686 useless extension candidates. Maximal degree in co-relation 1521. Up to 511 conditions per place. [2024-01-29 14:20:35,058 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 31 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-01-29 14:20:35,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 246 flow [2024-01-29 14:20:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-01-29 14:20:35,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151202749140894 [2024-01-29 14:20:35,059 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 188 flow. Second operand 3 states and 179 transitions. [2024-01-29 14:20:35,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 246 flow [2024-01-29 14:20:35,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 79 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:35,061 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 180 flow [2024-01-29 14:20:35,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-01-29 14:20:35,062 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2024-01-29 14:20:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 180 flow [2024-01-29 14:20:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:35,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-29 14:20:35,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash 64862185, now seen corresponding path program 1 times [2024-01-29 14:20:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733311316] [2024-01-29 14:20:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733311316] [2024-01-29 14:20:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733311316] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:20:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620002112] [2024-01-29 14:20:35,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 14:20:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 14:20:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 14:20:35,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 97 [2024-01-29 14:20:35,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2024-01-29 14:20:35,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 97 [2024-01-29 14:20:35,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,309 INFO L124 PetriNetUnfolderBase]: 298/874 cut-off events. [2024-01-29 14:20:35,310 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-01-29 14:20:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441 conditions, 874 events. 298/874 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6008 event pairs, 106 based on Foata normal form. 102/775 useless extension candidates. Maximal degree in co-relation 1425. Up to 468 conditions per place. [2024-01-29 14:20:35,317 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 41 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-01-29 14:20:35,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 277 flow [2024-01-29 14:20:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 14:20:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 14:20:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-01-29 14:20:35,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391752577319587 [2024-01-29 14:20:35,319 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 180 flow. Second operand 4 states and 248 transitions. [2024-01-29 14:20:35,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 277 flow [2024-01-29 14:20:35,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:35,322 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 166 flow [2024-01-29 14:20:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2024-01-29 14:20:35,323 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2024-01-29 14:20:35,324 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 166 flow [2024-01-29 14:20:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2024-01-29 14:20:35,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-29 14:20:35,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2093505721, now seen corresponding path program 1 times [2024-01-29 14:20:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216578844] [2024-01-29 14:20:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216578844] [2024-01-29 14:20:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216578844] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:20:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261617421] [2024-01-29 14:20:35,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 14:20:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 14:20:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 14:20:35,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 97 [2024-01-29 14:20:35,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 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) [2024-01-29 14:20:35,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 97 [2024-01-29 14:20:35,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,543 INFO L124 PetriNetUnfolderBase]: 245/731 cut-off events. [2024-01-29 14:20:35,543 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-01-29 14:20:35,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 731 events. 245/731 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4798 event pairs, 10 based on Foata normal form. 102/729 useless extension candidates. Maximal degree in co-relation 1030. Up to 351 conditions per place. [2024-01-29 14:20:35,547 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 48 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-01-29 14:20:35,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 299 flow [2024-01-29 14:20:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 14:20:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 14:20:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-01-29 14:20:35,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6572164948453608 [2024-01-29 14:20:35,548 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 166 flow. Second operand 4 states and 255 transitions. [2024-01-29 14:20:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 299 flow [2024-01-29 14:20:35,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:35,550 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 153 flow [2024-01-29 14:20:35,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-01-29 14:20:35,552 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2024-01-29 14:20:35,552 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 153 flow [2024-01-29 14:20:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 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) [2024-01-29 14:20:35,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-29 14:20:35,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash -304331218, now seen corresponding path program 1 times [2024-01-29 14:20:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732990259] [2024-01-29 14:20:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732990259] [2024-01-29 14:20:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732990259] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:20:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638718729] [2024-01-29 14:20:35,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:35,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 97 [2024-01-29 14:20:35,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-01-29 14:20:35,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 97 [2024-01-29 14:20:35,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,687 INFO L124 PetriNetUnfolderBase]: 417/994 cut-off events. [2024-01-29 14:20:35,687 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-01-29 14:20:35,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 994 events. 417/994 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6277 event pairs, 222 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 1656. Up to 423 conditions per place. [2024-01-29 14:20:35,692 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 42 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-01-29 14:20:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 286 flow [2024-01-29 14:20:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2024-01-29 14:20:35,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597938144329897 [2024-01-29 14:20:35,693 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 153 flow. Second operand 3 states and 192 transitions. [2024-01-29 14:20:35,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 286 flow [2024-01-29 14:20:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:35,696 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 164 flow [2024-01-29 14:20:35,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-01-29 14:20:35,698 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2024-01-29 14:20:35,698 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 164 flow [2024-01-29 14:20:35,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-01-29 14:20:35,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-29 14:20:35,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash -304330193, now seen corresponding path program 1 times [2024-01-29 14:20:35,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684030717] [2024-01-29 14:20:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684030717] [2024-01-29 14:20:35,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684030717] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:20:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815212112] [2024-01-29 14:20:35,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:35,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 97 [2024-01-29 14:20:35,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-01-29 14:20:35,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 97 [2024-01-29 14:20:35,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,815 INFO L124 PetriNetUnfolderBase]: 263/697 cut-off events. [2024-01-29 14:20:35,815 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-01-29 14:20:35,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 697 events. 263/697 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4132 event pairs, 121 based on Foata normal form. 94/735 useless extension candidates. Maximal degree in co-relation 1106. Up to 267 conditions per place. [2024-01-29 14:20:35,818 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 41 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2024-01-29 14:20:35,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 248 flow [2024-01-29 14:20:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2024-01-29 14:20:35,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6529209621993127 [2024-01-29 14:20:35,819 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 164 flow. Second operand 3 states and 190 transitions. [2024-01-29 14:20:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 248 flow [2024-01-29 14:20:35,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:35,821 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 138 flow [2024-01-29 14:20:35,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-01-29 14:20:35,821 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -36 predicate places. [2024-01-29 14:20:35,821 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 138 flow [2024-01-29 14:20:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-01-29 14:20:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-29 14:20:35,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 226839308, now seen corresponding path program 1 times [2024-01-29 14:20:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561384570] [2024-01-29 14:20:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561384570] [2024-01-29 14:20:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561384570] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:20:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490967757] [2024-01-29 14:20:35,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:35,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 97 [2024-01-29 14:20:35,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:35,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 97 [2024-01-29 14:20:35,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:35,926 INFO L124 PetriNetUnfolderBase]: 324/698 cut-off events. [2024-01-29 14:20:35,926 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-01-29 14:20:35,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 698 events. 324/698 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3836 event pairs, 171 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 1165. Up to 334 conditions per place. [2024-01-29 14:20:35,929 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 39 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-01-29 14:20:35,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 260 flow [2024-01-29 14:20:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-01-29 14:20:35,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6563573883161512 [2024-01-29 14:20:35,930 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 138 flow. Second operand 3 states and 191 transitions. [2024-01-29 14:20:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 260 flow [2024-01-29 14:20:35,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:20:35,931 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 149 flow [2024-01-29 14:20:35,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-01-29 14:20:35,931 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -36 predicate places. [2024-01-29 14:20:35,932 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 149 flow [2024-01-29 14:20:35,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:35,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:35,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-29 14:20:35,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:35,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash 226840333, now seen corresponding path program 1 times [2024-01-29 14:20:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336322385] [2024-01-29 14:20:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:35,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:35,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336322385] [2024-01-29 14:20:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336322385] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:35,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:35,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:20:35,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937591716] [2024-01-29 14:20:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:35,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 97 [2024-01-29 14:20:35,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:35,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 97 [2024-01-29 14:20:35,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:36,016 INFO L124 PetriNetUnfolderBase]: 213/509 cut-off events. [2024-01-29 14:20:36,016 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-01-29 14:20:36,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 509 events. 213/509 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2592 event pairs, 104 based on Foata normal form. 84/567 useless extension candidates. Maximal degree in co-relation 835. Up to 201 conditions per place. [2024-01-29 14:20:36,019 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 38 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-01-29 14:20:36,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 230 flow [2024-01-29 14:20:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-01-29 14:20:36,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494845360824743 [2024-01-29 14:20:36,020 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 149 flow. Second operand 3 states and 189 transitions. [2024-01-29 14:20:36,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 230 flow [2024-01-29 14:20:36,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:36,021 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 127 flow [2024-01-29 14:20:36,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-01-29 14:20:36,022 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -41 predicate places. [2024-01-29 14:20:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 127 flow [2024-01-29 14:20:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:36,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:36,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-29 14:20:36,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err10ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:36,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1205111500, now seen corresponding path program 1 times [2024-01-29 14:20:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245412341] [2024-01-29 14:20:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245412341] [2024-01-29 14:20:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245412341] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:36,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:36,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:20:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313441040] [2024-01-29 14:20:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:20:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:20:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:20:36,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 97 [2024-01-29 14:20:36,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:36,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:36,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 97 [2024-01-29 14:20:36,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:36,118 INFO L124 PetriNetUnfolderBase]: 157/427 cut-off events. [2024-01-29 14:20:36,118 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-01-29 14:20:36,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 427 events. 157/427 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2134 event pairs, 72 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 643. Up to 148 conditions per place. [2024-01-29 14:20:36,120 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 36 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-01-29 14:20:36,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 223 flow [2024-01-29 14:20:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:20:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:20:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2024-01-29 14:20:36,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044673539518901 [2024-01-29 14:20:36,121 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 127 flow. Second operand 3 states and 205 transitions. [2024-01-29 14:20:36,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 223 flow [2024-01-29 14:20:36,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:20:36,124 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 122 flow [2024-01-29 14:20:36,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-01-29 14:20:36,125 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -42 predicate places. [2024-01-29 14:20:36,125 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 122 flow [2024-01-29 14:20:36,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:20:36,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:36,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:36,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-29 14:20:36,126 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:36,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:36,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1849641591, now seen corresponding path program 1 times [2024-01-29 14:20:36,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:36,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847258314] [2024-01-29 14:20:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:36,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847258314] [2024-01-29 14:20:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847258314] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328661948] [2024-01-29 14:20:36,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:36,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:36,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 122 flow. Second operand has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:36,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:36,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:36,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:36,658 INFO L124 PetriNetUnfolderBase]: 385/888 cut-off events. [2024-01-29 14:20:36,659 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-01-29 14:20:36,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 888 events. 385/888 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5053 event pairs, 39 based on Foata normal form. 1/829 useless extension candidates. Maximal degree in co-relation 1583. Up to 258 conditions per place. [2024-01-29 14:20:36,663 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 61 selfloop transitions, 14 changer transitions 15/106 dead transitions. [2024-01-29 14:20:36,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 106 transitions, 446 flow [2024-01-29 14:20:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 388 transitions. [2024-01-29 14:20:36,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-29 14:20:36,664 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 122 flow. Second operand 9 states and 388 transitions. [2024-01-29 14:20:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 106 transitions, 446 flow [2024-01-29 14:20:36,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:20:36,666 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 212 flow [2024-01-29 14:20:36,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=212, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-01-29 14:20:36,667 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2024-01-29 14:20:36,667 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 212 flow [2024-01-29 14:20:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:36,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:36,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-29 14:20:36,667 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:36,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1002610297, now seen corresponding path program 2 times [2024-01-29 14:20:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903932599] [2024-01-29 14:20:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903932599] [2024-01-29 14:20:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903932599] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:36,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:36,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:36,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998763037] [2024-01-29 14:20:36,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:36,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:36,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:36,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:36,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:36,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:37,126 INFO L124 PetriNetUnfolderBase]: 293/724 cut-off events. [2024-01-29 14:20:37,126 INFO L125 PetriNetUnfolderBase]: For 383/417 co-relation queries the response was YES. [2024-01-29 14:20:37,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 724 events. 293/724 cut-off events. For 383/417 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4125 event pairs, 45 based on Foata normal form. 9/719 useless extension candidates. Maximal degree in co-relation 1736. Up to 203 conditions per place. [2024-01-29 14:20:37,130 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 52 selfloop transitions, 17 changer transitions 13/101 dead transitions. [2024-01-29 14:20:37,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 531 flow [2024-01-29 14:20:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 444 transitions. [2024-01-29 14:20:37,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085910652920962 [2024-01-29 14:20:37,132 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 212 flow. Second operand 9 states and 444 transitions. [2024-01-29 14:20:37,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 531 flow [2024-01-29 14:20:37,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 503 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-29 14:20:37,136 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 302 flow [2024-01-29 14:20:37,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=302, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-01-29 14:20:37,138 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -22 predicate places. [2024-01-29 14:20:37,138 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 302 flow [2024-01-29 14:20:37,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:37,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:37,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:37,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-29 14:20:37,139 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:37,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1799227569, now seen corresponding path program 3 times [2024-01-29 14:20:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182002496] [2024-01-29 14:20:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:37,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:37,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182002496] [2024-01-29 14:20:37,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182002496] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:37,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:37,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215878545] [2024-01-29 14:20:37,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:37,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:37,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:37,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:37,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:37,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:37,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:37,625 INFO L124 PetriNetUnfolderBase]: 303/768 cut-off events. [2024-01-29 14:20:37,625 INFO L125 PetriNetUnfolderBase]: For 771/791 co-relation queries the response was YES. [2024-01-29 14:20:37,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 768 events. 303/768 cut-off events. For 771/791 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4650 event pairs, 35 based on Foata normal form. 13/753 useless extension candidates. Maximal degree in co-relation 2034. Up to 228 conditions per place. [2024-01-29 14:20:37,629 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 60 selfloop transitions, 20 changer transitions 13/111 dead transitions. [2024-01-29 14:20:37,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 685 flow [2024-01-29 14:20:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 439 transitions. [2024-01-29 14:20:37,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028636884306987 [2024-01-29 14:20:37,631 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 302 flow. Second operand 9 states and 439 transitions. [2024-01-29 14:20:37,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 685 flow [2024-01-29 14:20:37,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 661 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-29 14:20:37,634 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 403 flow [2024-01-29 14:20:37,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-01-29 14:20:37,635 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2024-01-29 14:20:37,635 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 403 flow [2024-01-29 14:20:37,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:37,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:37,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-29 14:20:37,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:37,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 338910377, now seen corresponding path program 4 times [2024-01-29 14:20:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:37,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171166944] [2024-01-29 14:20:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:37,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:37,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171166944] [2024-01-29 14:20:37,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171166944] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:37,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:37,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:37,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869616260] [2024-01-29 14:20:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:37,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:37,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:37,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 403 flow. Second operand has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:37,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:37,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:37,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:38,090 INFO L124 PetriNetUnfolderBase]: 525/1159 cut-off events. [2024-01-29 14:20:38,090 INFO L125 PetriNetUnfolderBase]: For 1609/1617 co-relation queries the response was YES. [2024-01-29 14:20:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313 conditions, 1159 events. 525/1159 cut-off events. For 1609/1617 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7073 event pairs, 105 based on Foata normal form. 9/1157 useless extension candidates. Maximal degree in co-relation 3292. Up to 328 conditions per place. [2024-01-29 14:20:38,096 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 64 selfloop transitions, 27 changer transitions 13/120 dead transitions. [2024-01-29 14:20:38,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 808 flow [2024-01-29 14:20:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 383 transitions. [2024-01-29 14:20:38,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43871706758304696 [2024-01-29 14:20:38,098 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 403 flow. Second operand 9 states and 383 transitions. [2024-01-29 14:20:38,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 808 flow [2024-01-29 14:20:38,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 776 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-29 14:20:38,103 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 529 flow [2024-01-29 14:20:38,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=529, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2024-01-29 14:20:38,103 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2024-01-29 14:20:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 529 flow [2024-01-29 14:20:38,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:38,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:38,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-29 14:20:38,104 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:38,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1378386049, now seen corresponding path program 5 times [2024-01-29 14:20:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:38,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605887293] [2024-01-29 14:20:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605887293] [2024-01-29 14:20:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605887293] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:38,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:38,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168248435] [2024-01-29 14:20:38,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:38,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:38,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 529 flow. Second operand has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:38,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:38,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:38,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:38,640 INFO L124 PetriNetUnfolderBase]: 548/1245 cut-off events. [2024-01-29 14:20:38,640 INFO L125 PetriNetUnfolderBase]: For 2608/2624 co-relation queries the response was YES. [2024-01-29 14:20:38,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3704 conditions, 1245 events. 548/1245 cut-off events. For 2608/2624 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7774 event pairs, 109 based on Foata normal form. 17/1261 useless extension candidates. Maximal degree in co-relation 3680. Up to 348 conditions per place. [2024-01-29 14:20:38,648 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 69 selfloop transitions, 27 changer transitions 15/127 dead transitions. [2024-01-29 14:20:38,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 901 flow [2024-01-29 14:20:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 390 transitions. [2024-01-29 14:20:38,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44673539518900346 [2024-01-29 14:20:38,649 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 529 flow. Second operand 9 states and 390 transitions. [2024-01-29 14:20:38,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 901 flow [2024-01-29 14:20:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 871 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-29 14:20:38,655 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 572 flow [2024-01-29 14:20:38,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=572, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-01-29 14:20:38,655 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -5 predicate places. [2024-01-29 14:20:38,655 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 572 flow [2024-01-29 14:20:38,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:38,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:38,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-29 14:20:38,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:38,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1756663095, now seen corresponding path program 6 times [2024-01-29 14:20:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432043084] [2024-01-29 14:20:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432043084] [2024-01-29 14:20:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432043084] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658672770] [2024-01-29 14:20:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:38,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 97 [2024-01-29 14:20:38,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 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) [2024-01-29 14:20:38,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:38,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 97 [2024-01-29 14:20:38,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:39,112 INFO L124 PetriNetUnfolderBase]: 566/1271 cut-off events. [2024-01-29 14:20:39,113 INFO L125 PetriNetUnfolderBase]: For 3298/3314 co-relation queries the response was YES. [2024-01-29 14:20:39,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 1271 events. 566/1271 cut-off events. For 3298/3314 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7982 event pairs, 103 based on Foata normal form. 17/1286 useless extension candidates. Maximal degree in co-relation 3884. Up to 460 conditions per place. [2024-01-29 14:20:39,119 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 73 selfloop transitions, 23 changer transitions 15/127 dead transitions. [2024-01-29 14:20:39,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 946 flow [2024-01-29 14:20:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 375 transitions. [2024-01-29 14:20:39,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42955326460481097 [2024-01-29 14:20:39,121 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 572 flow. Second operand 9 states and 375 transitions. [2024-01-29 14:20:39,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 946 flow [2024-01-29 14:20:39,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 883 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:39,126 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 575 flow [2024-01-29 14:20:39,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=575, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-01-29 14:20:39,127 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -4 predicate places. [2024-01-29 14:20:39,127 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 575 flow [2024-01-29 14:20:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 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) [2024-01-29 14:20:39,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:39,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:39,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-29 14:20:39,127 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:39,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:39,128 INFO L85 PathProgramCache]: Analyzing trace with hash 380649817, now seen corresponding path program 7 times [2024-01-29 14:20:39,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:39,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548900975] [2024-01-29 14:20:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:39,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:39,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:39,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548900975] [2024-01-29 14:20:39,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548900975] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:39,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:39,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198988910] [2024-01-29 14:20:39,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:39,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:39,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:39,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 575 flow. Second operand has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:39,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:39,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:39,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:39,549 INFO L124 PetriNetUnfolderBase]: 388/981 cut-off events. [2024-01-29 14:20:39,549 INFO L125 PetriNetUnfolderBase]: For 3143/3227 co-relation queries the response was YES. [2024-01-29 14:20:39,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3153 conditions, 981 events. 388/981 cut-off events. For 3143/3227 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6311 event pairs, 53 based on Foata normal form. 45/1016 useless extension candidates. Maximal degree in co-relation 3128. Up to 282 conditions per place. [2024-01-29 14:20:39,555 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 57 selfloop transitions, 30 changer transitions 13/118 dead transitions. [2024-01-29 14:20:39,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 935 flow [2024-01-29 14:20:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 440 transitions. [2024-01-29 14:20:39,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040091638029782 [2024-01-29 14:20:39,556 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 575 flow. Second operand 9 states and 440 transitions. [2024-01-29 14:20:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 935 flow [2024-01-29 14:20:39,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 118 transitions, 877 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-29 14:20:39,562 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 628 flow [2024-01-29 14:20:39,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=628, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-01-29 14:20:39,562 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-01-29 14:20:39,562 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 628 flow [2024-01-29 14:20:39,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:39,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:39,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-29 14:20:39,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:39,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash -386028251, now seen corresponding path program 8 times [2024-01-29 14:20:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799596409] [2024-01-29 14:20:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:39,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799596409] [2024-01-29 14:20:39,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799596409] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:39,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:39,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:39,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088703123] [2024-01-29 14:20:39,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:39,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:39,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:39,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 628 flow. Second operand has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:39,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:39,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:40,063 INFO L124 PetriNetUnfolderBase]: 404/1025 cut-off events. [2024-01-29 14:20:40,063 INFO L125 PetriNetUnfolderBase]: For 3217/3307 co-relation queries the response was YES. [2024-01-29 14:20:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1025 events. 404/1025 cut-off events. For 3217/3307 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6607 event pairs, 63 based on Foata normal form. 41/1054 useless extension candidates. Maximal degree in co-relation 3265. Up to 288 conditions per place. [2024-01-29 14:20:40,069 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 61 selfloop transitions, 29 changer transitions 12/120 dead transitions. [2024-01-29 14:20:40,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 120 transitions, 963 flow [2024-01-29 14:20:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 439 transitions. [2024-01-29 14:20:40,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028636884306987 [2024-01-29 14:20:40,071 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 628 flow. Second operand 9 states and 439 transitions. [2024-01-29 14:20:40,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 120 transitions, 963 flow [2024-01-29 14:20:40,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 120 transitions, 911 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-29 14:20:40,077 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 656 flow [2024-01-29 14:20:40,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=656, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2024-01-29 14:20:40,077 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2024-01-29 14:20:40,077 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 656 flow [2024-01-29 14:20:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.0) internal successors, (387), 9 states have internal predecessors, (387), 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) [2024-01-29 14:20:40,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:40,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-29 14:20:40,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:40,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -911272721, now seen corresponding path program 9 times [2024-01-29 14:20:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702903304] [2024-01-29 14:20:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:40,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:40,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702903304] [2024-01-29 14:20:40,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702903304] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:40,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:40,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587298992] [2024-01-29 14:20:40,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:40,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:40,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 656 flow. Second operand has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:40,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:40,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:40,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:40,533 INFO L124 PetriNetUnfolderBase]: 397/1026 cut-off events. [2024-01-29 14:20:40,533 INFO L125 PetriNetUnfolderBase]: For 3738/3795 co-relation queries the response was YES. [2024-01-29 14:20:40,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 1026 events. 397/1026 cut-off events. For 3738/3795 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6693 event pairs, 66 based on Foata normal form. 23/1023 useless extension candidates. Maximal degree in co-relation 3376. Up to 290 conditions per place. [2024-01-29 14:20:40,538 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 58 selfloop transitions, 30 changer transitions 14/122 dead transitions. [2024-01-29 14:20:40,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 1021 flow [2024-01-29 14:20:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 447 transitions. [2024-01-29 14:20:40,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120274914089347 [2024-01-29 14:20:40,540 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 656 flow. Second operand 9 states and 447 transitions. [2024-01-29 14:20:40,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 1021 flow [2024-01-29 14:20:40,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 122 transitions, 951 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:40,546 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 696 flow [2024-01-29 14:20:40,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2024-01-29 14:20:40,546 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 4 predicate places. [2024-01-29 14:20:40,547 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 696 flow [2024-01-29 14:20:40,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:40,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:40,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:40,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-29 14:20:40,547 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:40,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:40,547 INFO L85 PathProgramCache]: Analyzing trace with hash -13439575, now seen corresponding path program 10 times [2024-01-29 14:20:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:40,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731925704] [2024-01-29 14:20:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:40,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731925704] [2024-01-29 14:20:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731925704] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:40,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031830782] [2024-01-29 14:20:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:40,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:40,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:40,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 696 flow. Second operand has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:40,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:40,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:40,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:41,085 INFO L124 PetriNetUnfolderBase]: 581/1333 cut-off events. [2024-01-29 14:20:41,086 INFO L125 PetriNetUnfolderBase]: For 4165/4177 co-relation queries the response was YES. [2024-01-29 14:20:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4349 conditions, 1333 events. 581/1333 cut-off events. For 4165/4177 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8749 event pairs, 135 based on Foata normal form. 13/1333 useless extension candidates. Maximal degree in co-relation 4321. Up to 384 conditions per place. [2024-01-29 14:20:41,093 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 72 selfloop transitions, 29 changer transitions 12/129 dead transitions. [2024-01-29 14:20:41,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 129 transitions, 1072 flow [2024-01-29 14:20:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 382 transitions. [2024-01-29 14:20:41,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43757159221076747 [2024-01-29 14:20:41,094 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 696 flow. Second operand 9 states and 382 transitions. [2024-01-29 14:20:41,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 129 transitions, 1072 flow [2024-01-29 14:20:41,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 1014 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-01-29 14:20:41,102 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 720 flow [2024-01-29 14:20:41,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=720, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2024-01-29 14:20:41,103 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2024-01-29 14:20:41,103 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 720 flow [2024-01-29 14:20:41,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.111111111111114) internal successors, (325), 9 states have internal predecessors, (325), 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) [2024-01-29 14:20:41,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:41,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:41,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-29 14:20:41,103 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:41,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:41,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2015516709, now seen corresponding path program 11 times [2024-01-29 14:20:41,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:41,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197409722] [2024-01-29 14:20:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:41,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:41,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197409722] [2024-01-29 14:20:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197409722] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:41,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726438918] [2024-01-29 14:20:41,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:41,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:41,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:41,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:41,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:41,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:41,537 INFO L124 PetriNetUnfolderBase]: 415/1088 cut-off events. [2024-01-29 14:20:41,537 INFO L125 PetriNetUnfolderBase]: For 4346/4399 co-relation queries the response was YES. [2024-01-29 14:20:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 1088 events. 415/1088 cut-off events. For 4346/4399 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7212 event pairs, 70 based on Foata normal form. 15/1079 useless extension candidates. Maximal degree in co-relation 3637. Up to 298 conditions per place. [2024-01-29 14:20:41,544 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 65 selfloop transitions, 29 changer transitions 13/127 dead transitions. [2024-01-29 14:20:41,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 127 transitions, 1081 flow [2024-01-29 14:20:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 448 transitions. [2024-01-29 14:20:41,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131729667812142 [2024-01-29 14:20:41,545 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 720 flow. Second operand 9 states and 448 transitions. [2024-01-29 14:20:41,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 127 transitions, 1081 flow [2024-01-29 14:20:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 127 transitions, 1013 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:41,555 INFO L231 Difference]: Finished difference. Result has 108 places, 93 transitions, 732 flow [2024-01-29 14:20:41,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=732, PETRI_PLACES=108, PETRI_TRANSITIONS=93} [2024-01-29 14:20:41,555 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 9 predicate places. [2024-01-29 14:20:41,555 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 93 transitions, 732 flow [2024-01-29 14:20:41,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.888888888888886) internal successors, (395), 9 states have internal predecessors, (395), 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) [2024-01-29 14:20:41,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:41,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-29 14:20:41,556 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:41,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1186136777, now seen corresponding path program 12 times [2024-01-29 14:20:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979387279] [2024-01-29 14:20:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979387279] [2024-01-29 14:20:41,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979387279] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:41,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:41,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-29 14:20:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308042103] [2024-01-29 14:20:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-29 14:20:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-29 14:20:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-01-29 14:20:41,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 97 [2024-01-29 14:20:41,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 93 transitions, 732 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 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) [2024-01-29 14:20:41,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:41,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 97 [2024-01-29 14:20:41,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:42,022 INFO L124 PetriNetUnfolderBase]: 608/1406 cut-off events. [2024-01-29 14:20:42,022 INFO L125 PetriNetUnfolderBase]: For 4952/4964 co-relation queries the response was YES. [2024-01-29 14:20:42,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4613 conditions, 1406 events. 608/1406 cut-off events. For 4952/4964 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9145 event pairs, 115 based on Foata normal form. 3/1399 useless extension candidates. Maximal degree in co-relation 4583. Up to 464 conditions per place. [2024-01-29 14:20:42,028 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 77 selfloop transitions, 23 changer transitions 12/128 dead transitions. [2024-01-29 14:20:42,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 128 transitions, 1106 flow [2024-01-29 14:20:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 14:20:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 14:20:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 364 transitions. [2024-01-29 14:20:42,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41695303550973656 [2024-01-29 14:20:42,030 INFO L175 Difference]: Start difference. First operand has 108 places, 93 transitions, 732 flow. Second operand 9 states and 364 transitions. [2024-01-29 14:20:42,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 128 transitions, 1106 flow [2024-01-29 14:20:42,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 128 transitions, 1036 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:42,038 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 730 flow [2024-01-29 14:20:42,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=730, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2024-01-29 14:20:42,039 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 10 predicate places. [2024-01-29 14:20:42,039 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 730 flow [2024-01-29 14:20:42,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 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) [2024-01-29 14:20:42,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:42,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:42,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-01-29 14:20:42,040 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:42,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1628425250, now seen corresponding path program 1 times [2024-01-29 14:20:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:42,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199223223] [2024-01-29 14:20:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:42,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:42,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:42,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199223223] [2024-01-29 14:20:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199223223] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:42,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:42,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158394623] [2024-01-29 14:20:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 730 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:42,322 INFO L124 PetriNetUnfolderBase]: 844/1961 cut-off events. [2024-01-29 14:20:42,322 INFO L125 PetriNetUnfolderBase]: For 6841/6853 co-relation queries the response was YES. [2024-01-29 14:20:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6385 conditions, 1961 events. 844/1961 cut-off events. For 6841/6853 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13901 event pairs, 204 based on Foata normal form. 34/1984 useless extension candidates. Maximal degree in co-relation 6351. Up to 434 conditions per place. [2024-01-29 14:20:42,333 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 112 selfloop transitions, 28 changer transitions 17/175 dead transitions. [2024-01-29 14:20:42,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1631 flow [2024-01-29 14:20:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 14:20:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 14:20:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 368 transitions. [2024-01-29 14:20:42,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419734904270986 [2024-01-29 14:20:42,334 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 730 flow. Second operand 7 states and 368 transitions. [2024-01-29 14:20:42,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1631 flow [2024-01-29 14:20:42,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1524 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:42,345 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 914 flow [2024-01-29 14:20:42,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2024-01-29 14:20:42,346 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2024-01-29 14:20:42,346 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 914 flow [2024-01-29 14:20:42,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:42,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:42,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:42,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-01-29 14:20:42,347 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:42,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash -674609390, now seen corresponding path program 2 times [2024-01-29 14:20:42,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:42,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833043438] [2024-01-29 14:20:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:42,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833043438] [2024-01-29 14:20:42,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833043438] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:42,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:42,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:42,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578233494] [2024-01-29 14:20:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:42,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:42,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:42,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:42,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 914 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:42,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:42,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:42,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:42,700 INFO L124 PetriNetUnfolderBase]: 899/2150 cut-off events. [2024-01-29 14:20:42,700 INFO L125 PetriNetUnfolderBase]: For 9954/9966 co-relation queries the response was YES. [2024-01-29 14:20:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7294 conditions, 2150 events. 899/2150 cut-off events. For 9954/9966 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15511 event pairs, 275 based on Foata normal form. 68/2210 useless extension candidates. Maximal degree in co-relation 6956. Up to 715 conditions per place. [2024-01-29 14:20:42,711 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 141 selfloop transitions, 49 changer transitions 4/212 dead transitions. [2024-01-29 14:20:42,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 212 transitions, 2103 flow [2024-01-29 14:20:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 14:20:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 14:20:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 431 transitions. [2024-01-29 14:20:42,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5554123711340206 [2024-01-29 14:20:42,713 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 914 flow. Second operand 8 states and 431 transitions. [2024-01-29 14:20:42,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 212 transitions, 2103 flow [2024-01-29 14:20:42,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 212 transitions, 2006 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:42,731 INFO L231 Difference]: Finished difference. Result has 120 places, 137 transitions, 1369 flow [2024-01-29 14:20:42,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1369, PETRI_PLACES=120, PETRI_TRANSITIONS=137} [2024-01-29 14:20:42,731 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 21 predicate places. [2024-01-29 14:20:42,731 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 137 transitions, 1369 flow [2024-01-29 14:20:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-01-29 14:20:42,732 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:42,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1593087620, now seen corresponding path program 1 times [2024-01-29 14:20:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323202949] [2024-01-29 14:20:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323202949] [2024-01-29 14:20:42,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323202949] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061241748] [2024-01-29 14:20:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:42,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:42,766 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) [2024-01-29 14:20:42,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-29 14:20:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:42,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-29 14:20:42,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:42,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:42,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061241748] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:42,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:42,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-29 14:20:42,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18465488] [2024-01-29 14:20:42,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:42,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-29 14:20:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-29 14:20:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-29 14:20:43,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:43,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 137 transitions, 1369 flow. Second operand has 8 states, 8 states have (on average 44.375) internal successors, (355), 8 states have internal predecessors, (355), 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) [2024-01-29 14:20:43,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:43,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:43,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:43,507 INFO L124 PetriNetUnfolderBase]: 1137/2766 cut-off events. [2024-01-29 14:20:43,507 INFO L125 PetriNetUnfolderBase]: For 13407/13427 co-relation queries the response was YES. [2024-01-29 14:20:43,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10008 conditions, 2766 events. 1137/2766 cut-off events. For 13407/13427 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20851 event pairs, 135 based on Foata normal form. 102/2862 useless extension candidates. Maximal degree in co-relation 9654. Up to 491 conditions per place. [2024-01-29 14:20:43,524 INFO L140 encePairwiseOnDemand]: 80/97 looper letters, 180 selfloop transitions, 74 changer transitions 8/280 dead transitions. [2024-01-29 14:20:43,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 280 transitions, 2848 flow [2024-01-29 14:20:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-29 14:20:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-29 14:20:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 680 transitions. [2024-01-29 14:20:43,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392545598731165 [2024-01-29 14:20:43,526 INFO L175 Difference]: Start difference. First operand has 120 places, 137 transitions, 1369 flow. Second operand 13 states and 680 transitions. [2024-01-29 14:20:43,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 280 transitions, 2848 flow [2024-01-29 14:20:43,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 280 transitions, 2774 flow, removed 37 selfloop flow, removed 0 redundant places. [2024-01-29 14:20:43,557 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1968 flow [2024-01-29 14:20:43,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1968, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-01-29 14:20:43,558 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 40 predicate places. [2024-01-29 14:20:43,558 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1968 flow [2024-01-29 14:20:43,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 44.375) internal successors, (355), 8 states have internal predecessors, (355), 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) [2024-01-29 14:20:43,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:43,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:43,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:43,770 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,SelfDestructingSolverStorable24 [2024-01-29 14:20:43,770 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:43,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2121726050, now seen corresponding path program 2 times [2024-01-29 14:20:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:43,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106669720] [2024-01-29 14:20:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:43,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106669720] [2024-01-29 14:20:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106669720] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:43,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:43,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:43,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222065769] [2024-01-29 14:20:43,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:43,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:43,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:43,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1968 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:43,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:43,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:44,194 INFO L124 PetriNetUnfolderBase]: 1205/2857 cut-off events. [2024-01-29 14:20:44,194 INFO L125 PetriNetUnfolderBase]: For 19659/19679 co-relation queries the response was YES. [2024-01-29 14:20:44,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 2857 events. 1205/2857 cut-off events. For 19659/19679 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21292 event pairs, 191 based on Foata normal form. 16/2859 useless extension candidates. Maximal degree in co-relation 12143. Up to 1061 conditions per place. [2024-01-29 14:20:44,211 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 170 selfloop transitions, 33 changer transitions 2/223 dead transitions. [2024-01-29 14:20:44,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2841 flow [2024-01-29 14:20:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 14:20:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 14:20:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 315 transitions. [2024-01-29 14:20:44,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412371134020618 [2024-01-29 14:20:44,213 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1968 flow. Second operand 6 states and 315 transitions. [2024-01-29 14:20:44,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2841 flow [2024-01-29 14:20:44,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 223 transitions, 2655 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-01-29 14:20:44,261 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1974 flow [2024-01-29 14:20:44,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1974, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-01-29 14:20:44,261 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 40 predicate places. [2024-01-29 14:20:44,262 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1974 flow [2024-01-29 14:20:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:44,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:44,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-01-29 14:20:44,262 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:44,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1165392602, now seen corresponding path program 3 times [2024-01-29 14:20:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432530547] [2024-01-29 14:20:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:44,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:44,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432530547] [2024-01-29 14:20:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432530547] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:44,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:44,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:44,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719787403] [2024-01-29 14:20:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:44,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:44,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1974 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:44,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:44,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:44,691 INFO L124 PetriNetUnfolderBase]: 1232/2897 cut-off events. [2024-01-29 14:20:44,691 INFO L125 PetriNetUnfolderBase]: For 18454/18477 co-relation queries the response was YES. [2024-01-29 14:20:44,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12059 conditions, 2897 events. 1232/2897 cut-off events. For 18454/18477 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21486 event pairs, 236 based on Foata normal form. 32/2905 useless extension candidates. Maximal degree in co-relation 11680. Up to 645 conditions per place. [2024-01-29 14:20:44,708 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 197 selfloop transitions, 38 changer transitions 8/262 dead transitions. [2024-01-29 14:20:44,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 262 transitions, 3162 flow [2024-01-29 14:20:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 14:20:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 14:20:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 436 transitions. [2024-01-29 14:20:44,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618556701030928 [2024-01-29 14:20:44,710 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1974 flow. Second operand 8 states and 436 transitions. [2024-01-29 14:20:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 262 transitions, 3162 flow [2024-01-29 14:20:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 262 transitions, 2978 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-01-29 14:20:44,746 INFO L231 Difference]: Finished difference. Result has 143 places, 182 transitions, 2009 flow [2024-01-29 14:20:44,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2009, PETRI_PLACES=143, PETRI_TRANSITIONS=182} [2024-01-29 14:20:44,747 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 44 predicate places. [2024-01-29 14:20:44,747 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 182 transitions, 2009 flow [2024-01-29 14:20:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-01-29 14:20:44,748 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -567048830, now seen corresponding path program 4 times [2024-01-29 14:20:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581636548] [2024-01-29 14:20:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581636548] [2024-01-29 14:20:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581636548] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:44,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:44,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:44,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8769808] [2024-01-29 14:20:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:44,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 182 transitions, 2009 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:44,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:44,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:44,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:45,139 INFO L124 PetriNetUnfolderBase]: 1012/2452 cut-off events. [2024-01-29 14:20:45,140 INFO L125 PetriNetUnfolderBase]: For 15632/15658 co-relation queries the response was YES. [2024-01-29 14:20:45,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10073 conditions, 2452 events. 1012/2452 cut-off events. For 15632/15658 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17862 event pairs, 164 based on Foata normal form. 72/2504 useless extension candidates. Maximal degree in co-relation 9693. Up to 1054 conditions per place. [2024-01-29 14:20:45,152 INFO L140 encePairwiseOnDemand]: 83/97 looper letters, 140 selfloop transitions, 61 changer transitions 5/225 dead transitions. [2024-01-29 14:20:45,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 2689 flow [2024-01-29 14:20:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 14:20:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 14:20:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2024-01-29 14:20:45,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493372606774669 [2024-01-29 14:20:45,157 INFO L175 Difference]: Start difference. First operand has 143 places, 182 transitions, 2009 flow. Second operand 7 states and 373 transitions. [2024-01-29 14:20:45,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 2689 flow [2024-01-29 14:20:45,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 225 transitions, 2624 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-29 14:20:45,182 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 2062 flow [2024-01-29 14:20:45,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2062, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-01-29 14:20:45,182 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 50 predicate places. [2024-01-29 14:20:45,182 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 2062 flow [2024-01-29 14:20:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:45,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:45,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-01-29 14:20:45,183 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:45,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash 82129482, now seen corresponding path program 3 times [2024-01-29 14:20:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279801213] [2024-01-29 14:20:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:45,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279801213] [2024-01-29 14:20:45,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279801213] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393408435] [2024-01-29 14:20:45,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 14:20:45,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:45,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:45,215 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) [2024-01-29 14:20:45,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-29 14:20:45,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-29 14:20:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:45,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-29 14:20:45,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:45,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393408435] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-29 14:20:45,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-01-29 14:20:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951622637] [2024-01-29 14:20:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-29 14:20:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:45,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 2062 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:45,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:45,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:45,686 INFO L124 PetriNetUnfolderBase]: 1069/2630 cut-off events. [2024-01-29 14:20:45,686 INFO L125 PetriNetUnfolderBase]: For 19485/19524 co-relation queries the response was YES. [2024-01-29 14:20:45,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11301 conditions, 2630 events. 1069/2630 cut-off events. For 19485/19524 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19453 event pairs, 216 based on Foata normal form. 98/2710 useless extension candidates. Maximal degree in co-relation 10862. Up to 810 conditions per place. [2024-01-29 14:20:45,699 INFO L140 encePairwiseOnDemand]: 82/97 looper letters, 178 selfloop transitions, 61 changer transitions 4/261 dead transitions. [2024-01-29 14:20:45,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 261 transitions, 3440 flow [2024-01-29 14:20:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 14:20:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 14:20:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2024-01-29 14:20:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807560137457045 [2024-01-29 14:20:45,705 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 2062 flow. Second operand 6 states and 338 transitions. [2024-01-29 14:20:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 261 transitions, 3440 flow [2024-01-29 14:20:45,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 261 transitions, 3353 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-01-29 14:20:45,737 INFO L231 Difference]: Finished difference. Result has 157 places, 195 transitions, 2567 flow [2024-01-29 14:20:45,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2567, PETRI_PLACES=157, PETRI_TRANSITIONS=195} [2024-01-29 14:20:45,738 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 58 predicate places. [2024-01-29 14:20:45,738 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 195 transitions, 2567 flow [2024-01-29 14:20:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:45,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:45,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:45,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:45,949 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,SelfDestructingSolverStorable28 [2024-01-29 14:20:45,950 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:45,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1832128844, now seen corresponding path program 4 times [2024-01-29 14:20:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:45,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912125819] [2024-01-29 14:20:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:45,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912125819] [2024-01-29 14:20:45,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912125819] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:45,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:45,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597812299] [2024-01-29 14:20:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:46,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 97 [2024-01-29 14:20:46,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 195 transitions, 2567 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:46,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:46,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 97 [2024-01-29 14:20:46,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:46,394 INFO L124 PetriNetUnfolderBase]: 1166/2855 cut-off events. [2024-01-29 14:20:46,394 INFO L125 PetriNetUnfolderBase]: For 26480/26517 co-relation queries the response was YES. [2024-01-29 14:20:46,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13457 conditions, 2855 events. 1166/2855 cut-off events. For 26480/26517 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 21570 event pairs, 226 based on Foata normal form. 22/2852 useless extension candidates. Maximal degree in co-relation 12976. Up to 579 conditions per place. [2024-01-29 14:20:46,411 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 205 selfloop transitions, 53 changer transitions 11/288 dead transitions. [2024-01-29 14:20:46,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 288 transitions, 4105 flow [2024-01-29 14:20:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 14:20:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 14:20:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 429 transitions. [2024-01-29 14:20:46,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528350515463918 [2024-01-29 14:20:46,413 INFO L175 Difference]: Start difference. First operand has 157 places, 195 transitions, 2567 flow. Second operand 8 states and 429 transitions. [2024-01-29 14:20:46,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 288 transitions, 4105 flow [2024-01-29 14:20:46,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 288 transitions, 4042 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-29 14:20:46,454 INFO L231 Difference]: Finished difference. Result has 167 places, 211 transitions, 2944 flow [2024-01-29 14:20:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2944, PETRI_PLACES=167, PETRI_TRANSITIONS=211} [2024-01-29 14:20:46,455 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 68 predicate places. [2024-01-29 14:20:46,455 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 211 transitions, 2944 flow [2024-01-29 14:20:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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) [2024-01-29 14:20:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-01-29 14:20:46,455 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:46,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1282217150, now seen corresponding path program 5 times [2024-01-29 14:20:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:46,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878479330] [2024-01-29 14:20:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878479330] [2024-01-29 14:20:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878479330] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:46,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:46,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424951992] [2024-01-29 14:20:46,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:46,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:46,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:46,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 211 transitions, 2944 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:46,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:46,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:46,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:46,925 INFO L124 PetriNetUnfolderBase]: 1114/2642 cut-off events. [2024-01-29 14:20:46,925 INFO L125 PetriNetUnfolderBase]: For 26487/26518 co-relation queries the response was YES. [2024-01-29 14:20:46,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 2642 events. 1114/2642 cut-off events. For 26487/26518 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19218 event pairs, 258 based on Foata normal form. 8/2623 useless extension candidates. Maximal degree in co-relation 12562. Up to 953 conditions per place. [2024-01-29 14:20:46,945 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 175 selfloop transitions, 43 changer transitions 8/244 dead transitions. [2024-01-29 14:20:46,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 3674 flow [2024-01-29 14:20:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 14:20:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 14:20:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 347 transitions. [2024-01-29 14:20:46,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5110456553755522 [2024-01-29 14:20:46,946 INFO L175 Difference]: Start difference. First operand has 167 places, 211 transitions, 2944 flow. Second operand 7 states and 347 transitions. [2024-01-29 14:20:46,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 3674 flow [2024-01-29 14:20:46,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 244 transitions, 3616 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-01-29 14:20:46,994 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2934 flow [2024-01-29 14:20:46,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2934, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-01-29 14:20:46,994 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 75 predicate places. [2024-01-29 14:20:46,994 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2934 flow [2024-01-29 14:20:46,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:46,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:46,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:46,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-01-29 14:20:46,995 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:46,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1627399006, now seen corresponding path program 5 times [2024-01-29 14:20:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:46,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334101241] [2024-01-29 14:20:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:46,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:47,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334101241] [2024-01-29 14:20:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334101241] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:20:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 14:20:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775601631] [2024-01-29 14:20:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:20:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:20:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:20:47,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:20:47,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2934 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:47,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:47,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:20:47,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:47,413 INFO L124 PetriNetUnfolderBase]: 1011/2384 cut-off events. [2024-01-29 14:20:47,414 INFO L125 PetriNetUnfolderBase]: For 25140/25176 co-relation queries the response was YES. [2024-01-29 14:20:47,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11813 conditions, 2384 events. 1011/2384 cut-off events. For 25140/25176 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16891 event pairs, 135 based on Foata normal form. 60/2427 useless extension candidates. Maximal degree in co-relation 11527. Up to 687 conditions per place. [2024-01-29 14:20:47,425 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 195 selfloop transitions, 30 changer transitions 5/248 dead transitions. [2024-01-29 14:20:47,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 248 transitions, 3706 flow [2024-01-29 14:20:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 14:20:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 14:20:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 318 transitions. [2024-01-29 14:20:47,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463917525773195 [2024-01-29 14:20:47,427 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2934 flow. Second operand 6 states and 318 transitions. [2024-01-29 14:20:47,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 248 transitions, 3706 flow [2024-01-29 14:20:47,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 248 transitions, 3492 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-01-29 14:20:47,461 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2640 flow [2024-01-29 14:20:47,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2640, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-01-29 14:20:47,461 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 69 predicate places. [2024-01-29 14:20:47,462 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2640 flow [2024-01-29 14:20:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-01-29 14:20:47,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:47,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:47,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-01-29 14:20:47,462 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:47,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash 475081043, now seen corresponding path program 1 times [2024-01-29 14:20:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129568395] [2024-01-29 14:20:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:47,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129568395] [2024-01-29 14:20:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129568395] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822291489] [2024-01-29 14:20:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:47,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:47,575 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) [2024-01-29 14:20:47,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-29 14:20:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:47,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:20:47,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:47,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:48,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822291489] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:48,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:48,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:20:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889035632] [2024-01-29 14:20:48,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:48,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:20:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:20:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:20:48,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:48,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2640 flow. Second operand has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:20:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:48,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:49,317 INFO L124 PetriNetUnfolderBase]: 1430/3452 cut-off events. [2024-01-29 14:20:49,317 INFO L125 PetriNetUnfolderBase]: For 28335/28385 co-relation queries the response was YES. [2024-01-29 14:20:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15737 conditions, 3452 events. 1430/3452 cut-off events. For 28335/28385 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 26444 event pairs, 95 based on Foata normal form. 26/3475 useless extension candidates. Maximal degree in co-relation 15246. Up to 617 conditions per place. [2024-01-29 14:20:49,340 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 161 selfloop transitions, 191 changer transitions 21/389 dead transitions. [2024-01-29 14:20:49,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 389 transitions, 5460 flow [2024-01-29 14:20:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-29 14:20:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-29 14:20:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 862 transitions. [2024-01-29 14:20:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317133038782523 [2024-01-29 14:20:49,342 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2640 flow. Second operand 21 states and 862 transitions. [2024-01-29 14:20:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 389 transitions, 5460 flow [2024-01-29 14:20:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 389 transitions, 5318 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-01-29 14:20:49,391 INFO L231 Difference]: Finished difference. Result has 193 places, 297 transitions, 4678 flow [2024-01-29 14:20:49,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4678, PETRI_PLACES=193, PETRI_TRANSITIONS=297} [2024-01-29 14:20:49,391 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 94 predicate places. [2024-01-29 14:20:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 297 transitions, 4678 flow [2024-01-29 14:20:49,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:20:49,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:49,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:49,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:49,602 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:49,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1138684421, now seen corresponding path program 2 times [2024-01-29 14:20:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036905710] [2024-01-29 14:20:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036905710] [2024-01-29 14:20:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036905710] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415272610] [2024-01-29 14:20:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 14:20:49,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:49,730 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) [2024-01-29 14:20:49,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-29 14:20:49,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:20:49,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:49,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:20:49,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:50,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415272610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:50,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:50,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:20:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854681738] [2024-01-29 14:20:50,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:50,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:20:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:20:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:20:50,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:50,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 297 transitions, 4678 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:20:50,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:50,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:50,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:51,952 INFO L124 PetriNetUnfolderBase]: 1852/4341 cut-off events. [2024-01-29 14:20:51,953 INFO L125 PetriNetUnfolderBase]: For 55215/55273 co-relation queries the response was YES. [2024-01-29 14:20:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 4341 events. 1852/4341 cut-off events. For 55215/55273 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 34853 event pairs, 151 based on Foata normal form. 74/4390 useless extension candidates. Maximal degree in co-relation 23891. Up to 805 conditions per place. [2024-01-29 14:20:52,002 INFO L140 encePairwiseOnDemand]: 83/97 looper letters, 224 selfloop transitions, 267 changer transitions 29/536 dead transitions. [2024-01-29 14:20:52,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 536 transitions, 9186 flow [2024-01-29 14:20:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-29 14:20:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-29 14:20:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1030 transitions. [2024-01-29 14:20:52,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247422680412371 [2024-01-29 14:20:52,004 INFO L175 Difference]: Start difference. First operand has 193 places, 297 transitions, 4678 flow. Second operand 25 states and 1030 transitions. [2024-01-29 14:20:52,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 536 transitions, 9186 flow [2024-01-29 14:20:52,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 536 transitions, 8864 flow, removed 130 selfloop flow, removed 4 redundant places. [2024-01-29 14:20:52,200 INFO L231 Difference]: Finished difference. Result has 224 places, 411 transitions, 7517 flow [2024-01-29 14:20:52,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7517, PETRI_PLACES=224, PETRI_TRANSITIONS=411} [2024-01-29 14:20:52,207 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 125 predicate places. [2024-01-29 14:20:52,207 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 411 transitions, 7517 flow [2024-01-29 14:20:52,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:20:52,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:52,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:52,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:52,421 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:52,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1417266839, now seen corresponding path program 3 times [2024-01-29 14:20:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430481074] [2024-01-29 14:20:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430481074] [2024-01-29 14:20:52,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430481074] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645518950] [2024-01-29 14:20:52,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 14:20:52,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:52,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:52,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:20:52,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-29 14:20:52,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-29 14:20:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:52,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:20:52,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:52,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645518950] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:53,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:20:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181195664] [2024-01-29 14:20:53,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:20:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:20:53,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:20:53,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:53,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 411 transitions, 7517 flow. Second operand has 23 states, 23 states have (on average 36.26086956521739) internal successors, (834), 23 states have internal predecessors, (834), 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) [2024-01-29 14:20:53,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:53,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:53,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:54,816 INFO L124 PetriNetUnfolderBase]: 1938/4569 cut-off events. [2024-01-29 14:20:54,816 INFO L125 PetriNetUnfolderBase]: For 65951/66015 co-relation queries the response was YES. [2024-01-29 14:20:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25956 conditions, 4569 events. 1938/4569 cut-off events. For 65951/66015 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 37089 event pairs, 119 based on Foata normal form. 33/4599 useless extension candidates. Maximal degree in co-relation 25859. Up to 637 conditions per place. [2024-01-29 14:20:54,853 INFO L140 encePairwiseOnDemand]: 79/97 looper letters, 165 selfloop transitions, 229 changer transitions 136/546 dead transitions. [2024-01-29 14:20:54,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 546 transitions, 9874 flow [2024-01-29 14:20:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-29 14:20:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-29 14:20:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1087 transitions. [2024-01-29 14:20:54,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150439098892707 [2024-01-29 14:20:54,855 INFO L175 Difference]: Start difference. First operand has 224 places, 411 transitions, 7517 flow. Second operand 27 states and 1087 transitions. [2024-01-29 14:20:54,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 546 transitions, 9874 flow [2024-01-29 14:20:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 546 transitions, 9368 flow, removed 117 selfloop flow, removed 12 redundant places. [2024-01-29 14:20:55,070 INFO L231 Difference]: Finished difference. Result has 241 places, 341 transitions, 6110 flow [2024-01-29 14:20:55,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6110, PETRI_PLACES=241, PETRI_TRANSITIONS=341} [2024-01-29 14:20:55,070 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 142 predicate places. [2024-01-29 14:20:55,071 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 341 transitions, 6110 flow [2024-01-29 14:20:55,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.26086956521739) internal successors, (834), 23 states have internal predecessors, (834), 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) [2024-01-29 14:20:55,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:55,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:55,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:55,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-29 14:20:55,272 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:55,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2000933283, now seen corresponding path program 4 times [2024-01-29 14:20:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299207244] [2024-01-29 14:20:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:55,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:55,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299207244] [2024-01-29 14:20:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299207244] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963327280] [2024-01-29 14:20:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-29 14:20:55,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:55,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:20:55,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-29 14:20:55,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-29 14:20:55,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:55,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:20:55,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:55,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:55,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963327280] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:55,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:55,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-29 14:20:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641350031] [2024-01-29 14:20:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:20:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:20:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:20:56,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 97 [2024-01-29 14:20:56,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 341 transitions, 6110 flow. Second operand has 23 states, 23 states have (on average 34.26086956521739) internal successors, (788), 23 states have internal predecessors, (788), 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) [2024-01-29 14:20:56,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:56,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 97 [2024-01-29 14:20:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:56,979 INFO L124 PetriNetUnfolderBase]: 1349/3317 cut-off events. [2024-01-29 14:20:56,979 INFO L125 PetriNetUnfolderBase]: For 46497/46561 co-relation queries the response was YES. [2024-01-29 14:20:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18794 conditions, 3317 events. 1349/3317 cut-off events. For 46497/46561 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 25785 event pairs, 71 based on Foata normal form. 23/3337 useless extension candidates. Maximal degree in co-relation 18725. Up to 480 conditions per place. [2024-01-29 14:20:57,002 INFO L140 encePairwiseOnDemand]: 82/97 looper letters, 112 selfloop transitions, 205 changer transitions 81/413 dead transitions. [2024-01-29 14:20:57,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 413 transitions, 7299 flow [2024-01-29 14:20:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-29 14:20:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-29 14:20:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 704 transitions. [2024-01-29 14:20:57,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032073310423826 [2024-01-29 14:20:57,003 INFO L175 Difference]: Start difference. First operand has 241 places, 341 transitions, 6110 flow. Second operand 18 states and 704 transitions. [2024-01-29 14:20:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 413 transitions, 7299 flow [2024-01-29 14:20:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 413 transitions, 6723 flow, removed 34 selfloop flow, removed 27 redundant places. [2024-01-29 14:20:57,112 INFO L231 Difference]: Finished difference. Result has 225 places, 296 transitions, 5276 flow [2024-01-29 14:20:57,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5554, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5276, PETRI_PLACES=225, PETRI_TRANSITIONS=296} [2024-01-29 14:20:57,113 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 126 predicate places. [2024-01-29 14:20:57,113 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 296 transitions, 5276 flow [2024-01-29 14:20:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 34.26086956521739) internal successors, (788), 23 states have internal predecessors, (788), 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) [2024-01-29 14:20:57,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:57,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:57,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-29 14:20:57,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:57,314 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2032195611, now seen corresponding path program 5 times [2024-01-29 14:20:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:57,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186681111] [2024-01-29 14:20:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:57,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186681111] [2024-01-29 14:20:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186681111] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855066809] [2024-01-29 14:20:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-29 14:20:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:57,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:20:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-29 14:20:57,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-29 14:20:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:57,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:20:57,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:57,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-29 14:20:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855066809] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:20:57,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-29 14:20:57,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-01-29 14:20:57,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154200267] [2024-01-29 14:20:57,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:20:57,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-29 14:20:57,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:57,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-29 14:20:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-01-29 14:20:57,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 97 [2024-01-29 14:20:57,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 296 transitions, 5276 flow. Second operand has 8 states, 8 states have (on average 45.625) internal successors, (365), 8 states have internal predecessors, (365), 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) [2024-01-29 14:20:57,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:57,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 97 [2024-01-29 14:20:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:20:58,162 INFO L124 PetriNetUnfolderBase]: 948/2406 cut-off events. [2024-01-29 14:20:58,162 INFO L125 PetriNetUnfolderBase]: For 34982/35087 co-relation queries the response was YES. [2024-01-29 14:20:58,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13776 conditions, 2406 events. 948/2406 cut-off events. For 34982/35087 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17737 event pairs, 96 based on Foata normal form. 28/2408 useless extension candidates. Maximal degree in co-relation 13714. Up to 574 conditions per place. [2024-01-29 14:20:58,182 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 212 selfloop transitions, 76 changer transitions 18/330 dead transitions. [2024-01-29 14:20:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 330 transitions, 6187 flow [2024-01-29 14:20:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 14:20:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 14:20:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 413 transitions. [2024-01-29 14:20:58,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322164948453608 [2024-01-29 14:20:58,183 INFO L175 Difference]: Start difference. First operand has 225 places, 296 transitions, 5276 flow. Second operand 8 states and 413 transitions. [2024-01-29 14:20:58,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 330 transitions, 6187 flow [2024-01-29 14:20:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 330 transitions, 5448 flow, removed 40 selfloop flow, removed 24 redundant places. [2024-01-29 14:20:58,262 INFO L231 Difference]: Finished difference. Result has 199 places, 292 transitions, 4739 flow [2024-01-29 14:20:58,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4739, PETRI_PLACES=199, PETRI_TRANSITIONS=292} [2024-01-29 14:20:58,263 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 100 predicate places. [2024-01-29 14:20:58,263 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 292 transitions, 4739 flow [2024-01-29 14:20:58,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 45.625) internal successors, (365), 8 states have internal predecessors, (365), 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) [2024-01-29 14:20:58,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:20:58,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:20:58,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-29 14:20:58,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:58,470 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:20:58,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:20:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash 851815741, now seen corresponding path program 6 times [2024-01-29 14:20:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:20:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224568646] [2024-01-29 14:20:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:20:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:20:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:20:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:58,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:20:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224568646] [2024-01-29 14:20:58,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224568646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:20:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391067158] [2024-01-29 14:20:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-29 14:20:58,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:20:58,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:20:58,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:20:58,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-29 14:20:58,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-29 14:20:58,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:20:58,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:20:58,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:20:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:58,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:20:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:20:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391067158] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:20:59,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:20:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:20:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162932371] [2024-01-29 14:20:59,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:20:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:20:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:20:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:20:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:20:59,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:20:59,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 292 transitions, 4739 flow. Second operand has 23 states, 23 states have (on average 36.08695652173913) internal successors, (830), 23 states have internal predecessors, (830), 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) [2024-01-29 14:20:59,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:20:59,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:20:59,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:00,733 INFO L124 PetriNetUnfolderBase]: 1371/3284 cut-off events. [2024-01-29 14:21:00,733 INFO L125 PetriNetUnfolderBase]: For 39246/39306 co-relation queries the response was YES. [2024-01-29 14:21:00,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18285 conditions, 3284 events. 1371/3284 cut-off events. For 39246/39306 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 25163 event pairs, 61 based on Foata normal form. 62/3336 useless extension candidates. Maximal degree in co-relation 18230. Up to 561 conditions per place. [2024-01-29 14:21:00,754 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 122 selfloop transitions, 293 changer transitions 117/548 dead transitions. [2024-01-29 14:21:00,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 548 transitions, 9251 flow [2024-01-29 14:21:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-29 14:21:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-29 14:21:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1561 transitions. [2024-01-29 14:21:00,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39250691475986926 [2024-01-29 14:21:00,756 INFO L175 Difference]: Start difference. First operand has 199 places, 292 transitions, 4739 flow. Second operand 41 states and 1561 transitions. [2024-01-29 14:21:00,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 548 transitions, 9251 flow [2024-01-29 14:21:00,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 548 transitions, 9001 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-01-29 14:21:00,846 INFO L231 Difference]: Finished difference. Result has 235 places, 372 transitions, 6587 flow [2024-01-29 14:21:00,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6587, PETRI_PLACES=235, PETRI_TRANSITIONS=372} [2024-01-29 14:21:00,847 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 136 predicate places. [2024-01-29 14:21:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 372 transitions, 6587 flow [2024-01-29 14:21:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.08695652173913) internal successors, (830), 23 states have internal predecessors, (830), 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) [2024-01-29 14:21:00,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:00,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-29 14:21:01,049 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:01,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1310391219, now seen corresponding path program 7 times [2024-01-29 14:21:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001988282] [2024-01-29 14:21:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:01,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001988282] [2024-01-29 14:21:01,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001988282] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043850521] [2024-01-29 14:21:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-29 14:21:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:01,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:01,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-29 14:21:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:01,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:01,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:01,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:01,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043850521] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973660900] [2024-01-29 14:21:01,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:01,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:01,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:01,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:01,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 372 transitions, 6587 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:01,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:01,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:01,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:03,285 INFO L124 PetriNetUnfolderBase]: 1736/4262 cut-off events. [2024-01-29 14:21:03,285 INFO L125 PetriNetUnfolderBase]: For 58545/58657 co-relation queries the response was YES. [2024-01-29 14:21:03,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24423 conditions, 4262 events. 1736/4262 cut-off events. For 58545/58657 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35434 event pairs, 40 based on Foata normal form. 185/4433 useless extension candidates. Maximal degree in co-relation 24365. Up to 739 conditions per place. [2024-01-29 14:21:03,319 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 171 selfloop transitions, 424 changer transitions 73/684 dead transitions. [2024-01-29 14:21:03,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 684 transitions, 12362 flow [2024-01-29 14:21:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-29 14:21:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-29 14:21:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1597 transitions. [2024-01-29 14:21:03,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015589640432487 [2024-01-29 14:21:03,321 INFO L175 Difference]: Start difference. First operand has 235 places, 372 transitions, 6587 flow. Second operand 41 states and 1597 transitions. [2024-01-29 14:21:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 684 transitions, 12362 flow [2024-01-29 14:21:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 684 transitions, 11636 flow, removed 172 selfloop flow, removed 14 redundant places. [2024-01-29 14:21:03,478 INFO L231 Difference]: Finished difference. Result has 269 places, 518 transitions, 10060 flow [2024-01-29 14:21:03,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6036, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10060, PETRI_PLACES=269, PETRI_TRANSITIONS=518} [2024-01-29 14:21:03,478 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 170 predicate places. [2024-01-29 14:21:03,479 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 518 transitions, 10060 flow [2024-01-29 14:21:03,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:03,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:03,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:03,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-29 14:21:03,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-29 14:21:03,688 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:03,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1217005963, now seen corresponding path program 8 times [2024-01-29 14:21:03,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:03,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670190760] [2024-01-29 14:21:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:03,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670190760] [2024-01-29 14:21:03,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670190760] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:03,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908533521] [2024-01-29 14:21:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 14:21:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:03,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:03,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-29 14:21:03,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:21:03,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:03,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:03,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:03,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908533521] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:04,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026853337] [2024-01-29 14:21:04,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:04,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:04,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:04,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 518 transitions, 10060 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:04,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:04,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:04,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:05,817 INFO L124 PetriNetUnfolderBase]: 1915/4646 cut-off events. [2024-01-29 14:21:05,817 INFO L125 PetriNetUnfolderBase]: For 81376/81438 co-relation queries the response was YES. [2024-01-29 14:21:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29413 conditions, 4646 events. 1915/4646 cut-off events. For 81376/81438 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39085 event pairs, 64 based on Foata normal form. 64/4682 useless extension candidates. Maximal degree in co-relation 29344. Up to 803 conditions per place. [2024-01-29 14:21:05,860 INFO L140 encePairwiseOnDemand]: 80/97 looper letters, 232 selfloop transitions, 425 changer transitions 39/712 dead transitions. [2024-01-29 14:21:05,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 712 transitions, 14599 flow [2024-01-29 14:21:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-29 14:21:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-29 14:21:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1192 transitions. [2024-01-29 14:21:05,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962199312714775 [2024-01-29 14:21:05,862 INFO L175 Difference]: Start difference. First operand has 269 places, 518 transitions, 10060 flow. Second operand 30 states and 1192 transitions. [2024-01-29 14:21:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 712 transitions, 14599 flow [2024-01-29 14:21:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 712 transitions, 14060 flow, removed 145 selfloop flow, removed 15 redundant places. [2024-01-29 14:21:06,215 INFO L231 Difference]: Finished difference. Result has 285 places, 594 transitions, 12633 flow [2024-01-29 14:21:06,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9515, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12633, PETRI_PLACES=285, PETRI_TRANSITIONS=594} [2024-01-29 14:21:06,216 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 186 predicate places. [2024-01-29 14:21:06,216 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 594 transitions, 12633 flow [2024-01-29 14:21:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:06,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:06,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:06,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-29 14:21:06,424 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:06,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1182736617, now seen corresponding path program 9 times [2024-01-29 14:21:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:06,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56936090] [2024-01-29 14:21:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56936090] [2024-01-29 14:21:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56936090] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428289025] [2024-01-29 14:21:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 14:21:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:06,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:06,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-29 14:21:06,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-29 14:21:06,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:06,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:06,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:06,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:06,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428289025] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:06,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:06,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392002026] [2024-01-29 14:21:06,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:07,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:07,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 594 transitions, 12633 flow. Second operand has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:21:07,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:07,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:07,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:09,180 INFO L124 PetriNetUnfolderBase]: 1858/4497 cut-off events. [2024-01-29 14:21:09,180 INFO L125 PetriNetUnfolderBase]: For 92037/92097 co-relation queries the response was YES. [2024-01-29 14:21:09,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30429 conditions, 4497 events. 1858/4497 cut-off events. For 92037/92097 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37372 event pairs, 40 based on Foata normal form. 36/4525 useless extension candidates. Maximal degree in co-relation 30361. Up to 813 conditions per place. [2024-01-29 14:21:09,223 INFO L140 encePairwiseOnDemand]: 79/97 looper letters, 176 selfloop transitions, 515 changer transitions 45/752 dead transitions. [2024-01-29 14:21:09,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 752 transitions, 16317 flow [2024-01-29 14:21:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-29 14:21:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-29 14:21:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1470 transitions. [2024-01-29 14:21:09,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880629408572976 [2024-01-29 14:21:09,225 INFO L175 Difference]: Start difference. First operand has 285 places, 594 transitions, 12633 flow. Second operand 38 states and 1470 transitions. [2024-01-29 14:21:09,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 752 transitions, 16317 flow [2024-01-29 14:21:09,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 752 transitions, 16029 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-01-29 14:21:09,557 INFO L231 Difference]: Finished difference. Result has 318 places, 643 transitions, 14865 flow [2024-01-29 14:21:09,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12412, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=14865, PETRI_PLACES=318, PETRI_TRANSITIONS=643} [2024-01-29 14:21:09,558 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 219 predicate places. [2024-01-29 14:21:09,558 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 643 transitions, 14865 flow [2024-01-29 14:21:09,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:21:09,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:09,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:09,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-01-29 14:21:09,759 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:09,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1515388213, now seen corresponding path program 10 times [2024-01-29 14:21:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:09,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813859610] [2024-01-29 14:21:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:09,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813859610] [2024-01-29 14:21:09,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813859610] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287091576] [2024-01-29 14:21:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-29 14:21:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:09,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:09,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-29 14:21:09,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-29 14:21:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:09,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:09,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:10,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287091576] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:10,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:10,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-29 14:21:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088657836] [2024-01-29 14:21:10,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:10,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:10,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 643 transitions, 14865 flow. Second operand has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:21:10,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:10,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:10,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:12,831 INFO L124 PetriNetUnfolderBase]: 2344/5609 cut-off events. [2024-01-29 14:21:12,831 INFO L125 PetriNetUnfolderBase]: For 127033/127117 co-relation queries the response was YES. [2024-01-29 14:21:12,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39938 conditions, 5609 events. 2344/5609 cut-off events. For 127033/127117 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 47934 event pairs, 66 based on Foata normal form. 44/5643 useless extension candidates. Maximal degree in co-relation 39867. Up to 1073 conditions per place. [2024-01-29 14:21:12,891 INFO L140 encePairwiseOnDemand]: 78/97 looper letters, 240 selfloop transitions, 663 changer transitions 33/952 dead transitions. [2024-01-29 14:21:12,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 952 transitions, 22312 flow [2024-01-29 14:21:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-01-29 14:21:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-01-29 14:21:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1676 transitions. [2024-01-29 14:21:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018221050107888 [2024-01-29 14:21:12,893 INFO L175 Difference]: Start difference. First operand has 318 places, 643 transitions, 14865 flow. Second operand 43 states and 1676 transitions. [2024-01-29 14:21:12,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 952 transitions, 22312 flow [2024-01-29 14:21:13,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 952 transitions, 21930 flow, removed 86 selfloop flow, removed 13 redundant places. [2024-01-29 14:21:13,315 INFO L231 Difference]: Finished difference. Result has 354 places, 813 transitions, 20927 flow [2024-01-29 14:21:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14573, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=20927, PETRI_PLACES=354, PETRI_TRANSITIONS=813} [2024-01-29 14:21:13,316 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 255 predicate places. [2024-01-29 14:21:13,316 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 813 transitions, 20927 flow [2024-01-29 14:21:13,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.130434782608695) internal successors, (831), 23 states have internal predecessors, (831), 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) [2024-01-29 14:21:13,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:13,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:13,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-29 14:21:13,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:13,517 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:13,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash 413315223, now seen corresponding path program 11 times [2024-01-29 14:21:13,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:13,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541840528] [2024-01-29 14:21:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:13,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:13,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:13,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541840528] [2024-01-29 14:21:13,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541840528] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:13,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347887612] [2024-01-29 14:21:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-29 14:21:13,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:13,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:13,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:13,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-29 14:21:13,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-29 14:21:13,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:13,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:21:13,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:13,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347887612] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:13,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-01-29 14:21:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763406507] [2024-01-29 14:21:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-29 14:21:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-29 14:21:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-01-29 14:21:14,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-01-29 14:21:14,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 813 transitions, 20927 flow. Second operand has 19 states, 19 states have (on average 40.36842105263158) internal successors, (767), 19 states have internal predecessors, (767), 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) [2024-01-29 14:21:14,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:14,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-01-29 14:21:14,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:16,051 INFO L124 PetriNetUnfolderBase]: 2329/5570 cut-off events. [2024-01-29 14:21:16,052 INFO L125 PetriNetUnfolderBase]: For 151578/151662 co-relation queries the response was YES. [2024-01-29 14:21:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42879 conditions, 5570 events. 2329/5570 cut-off events. For 151578/151662 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 47417 event pairs, 69 based on Foata normal form. 26/5568 useless extension candidates. Maximal degree in co-relation 42797. Up to 1088 conditions per place. [2024-01-29 14:21:16,106 INFO L140 encePairwiseOnDemand]: 82/97 looper letters, 263 selfloop transitions, 590 changer transitions 41/912 dead transitions. [2024-01-29 14:21:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 912 transitions, 24283 flow [2024-01-29 14:21:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-29 14:21:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-29 14:21:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1084 transitions. [2024-01-29 14:21:16,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470103092783505 [2024-01-29 14:21:16,108 INFO L175 Difference]: Start difference. First operand has 354 places, 813 transitions, 20927 flow. Second operand 25 states and 1084 transitions. [2024-01-29 14:21:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 912 transitions, 24283 flow [2024-01-29 14:21:16,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 912 transitions, 23695 flow, removed 80 selfloop flow, removed 20 redundant places. [2024-01-29 14:21:16,560 INFO L231 Difference]: Finished difference. Result has 356 places, 833 transitions, 22574 flow [2024-01-29 14:21:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=20317, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22574, PETRI_PLACES=356, PETRI_TRANSITIONS=833} [2024-01-29 14:21:16,561 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 257 predicate places. [2024-01-29 14:21:16,561 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 833 transitions, 22574 flow [2024-01-29 14:21:16,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 40.36842105263158) internal successors, (767), 19 states have internal predecessors, (767), 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) [2024-01-29 14:21:16,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:16,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:16,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-29 14:21:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-29 14:21:16,762 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:16,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash -271969735, now seen corresponding path program 12 times [2024-01-29 14:21:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:16,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63744619] [2024-01-29 14:21:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63744619] [2024-01-29 14:21:16,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63744619] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:16,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662880804] [2024-01-29 14:21:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-29 14:21:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:16,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:16,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-29 14:21:16,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-29 14:21:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:16,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:16,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:17,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:17,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662880804] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:17,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:17,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926949008] [2024-01-29 14:21:17,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:17,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:17,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:17,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 833 transitions, 22574 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:17,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:17,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:17,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:20,448 INFO L124 PetriNetUnfolderBase]: 3556/8426 cut-off events. [2024-01-29 14:21:20,449 INFO L125 PetriNetUnfolderBase]: For 257128/257277 co-relation queries the response was YES. [2024-01-29 14:21:20,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68186 conditions, 8426 events. 3556/8426 cut-off events. For 257128/257277 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77863 event pairs, 59 based on Foata normal form. 120/8524 useless extension candidates. Maximal degree in co-relation 68103. Up to 1789 conditions per place. [2024-01-29 14:21:20,520 INFO L140 encePairwiseOnDemand]: 78/97 looper letters, 109 selfloop transitions, 789 changer transitions 483/1397 dead transitions. [2024-01-29 14:21:20,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1397 transitions, 39356 flow [2024-01-29 14:21:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-29 14:21:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-29 14:21:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1545 transitions. [2024-01-29 14:21:20,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39819587628865977 [2024-01-29 14:21:20,522 INFO L175 Difference]: Start difference. First operand has 356 places, 833 transitions, 22574 flow. Second operand 40 states and 1545 transitions. [2024-01-29 14:21:20,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1397 transitions, 39356 flow [2024-01-29 14:21:21,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1397 transitions, 38612 flow, removed 39 selfloop flow, removed 24 redundant places. [2024-01-29 14:21:21,401 INFO L231 Difference]: Finished difference. Result has 380 places, 869 transitions, 25262 flow [2024-01-29 14:21:21,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22099, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=25262, PETRI_PLACES=380, PETRI_TRANSITIONS=869} [2024-01-29 14:21:21,402 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 281 predicate places. [2024-01-29 14:21:21,402 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 869 transitions, 25262 flow [2024-01-29 14:21:21,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:21,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:21,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:21,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:21,615 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:21,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 161835711, now seen corresponding path program 13 times [2024-01-29 14:21:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807719316] [2024-01-29 14:21:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:21,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807719316] [2024-01-29 14:21:21,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807719316] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:21,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910379976] [2024-01-29 14:21:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-29 14:21:21,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:21,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-29 14:21:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:21,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:21,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:21,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910379976] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:22,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:22,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430793916] [2024-01-29 14:21:22,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:22,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:22,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 869 transitions, 25262 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:22,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:22,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:22,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:25,724 INFO L124 PetriNetUnfolderBase]: 3902/9180 cut-off events. [2024-01-29 14:21:25,725 INFO L125 PetriNetUnfolderBase]: For 344926/345137 co-relation queries the response was YES. [2024-01-29 14:21:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81909 conditions, 9180 events. 3902/9180 cut-off events. For 344926/345137 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 84866 event pairs, 49 based on Foata normal form. 168/9332 useless extension candidates. Maximal degree in co-relation 81819. Up to 2047 conditions per place. [2024-01-29 14:21:25,820 INFO L140 encePairwiseOnDemand]: 79/97 looper letters, 145 selfloop transitions, 892 changer transitions 542/1595 dead transitions. [2024-01-29 14:21:25,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1595 transitions, 48456 flow [2024-01-29 14:21:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-29 14:21:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-29 14:21:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1857 transitions. [2024-01-29 14:21:25,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39884020618556704 [2024-01-29 14:21:25,822 INFO L175 Difference]: Start difference. First operand has 380 places, 869 transitions, 25262 flow. Second operand 48 states and 1857 transitions. [2024-01-29 14:21:25,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1595 transitions, 48456 flow [2024-01-29 14:21:27,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1595 transitions, 47310 flow, removed 356 selfloop flow, removed 16 redundant places. [2024-01-29 14:21:27,203 INFO L231 Difference]: Finished difference. Result has 408 places, 995 transitions, 30500 flow [2024-01-29 14:21:27,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=24716, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=757, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=30500, PETRI_PLACES=408, PETRI_TRANSITIONS=995} [2024-01-29 14:21:27,204 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 309 predicate places. [2024-01-29 14:21:27,205 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 995 transitions, 30500 flow [2024-01-29 14:21:27,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:27,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:27,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:27,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:27,417 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:27,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 598628523, now seen corresponding path program 14 times [2024-01-29 14:21:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141475677] [2024-01-29 14:21:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141475677] [2024-01-29 14:21:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141475677] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461042405] [2024-01-29 14:21:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 14:21:27,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:27,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:27,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:27,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-29 14:21:27,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:21:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:27,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:27,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:27,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461042405] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:27,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-01-29 14:21:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497658942] [2024-01-29 14:21:27,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:27,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:28,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:28,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 995 transitions, 30500 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:28,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:28,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:28,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:30,229 INFO L124 PetriNetUnfolderBase]: 2594/6202 cut-off events. [2024-01-29 14:21:30,229 INFO L125 PetriNetUnfolderBase]: For 248234/248385 co-relation queries the response was YES. [2024-01-29 14:21:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55909 conditions, 6202 events. 2594/6202 cut-off events. For 248234/248385 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 53302 event pairs, 53 based on Foata normal form. 74/6258 useless extension candidates. Maximal degree in co-relation 55817. Up to 1127 conditions per place. [2024-01-29 14:21:30,301 INFO L140 encePairwiseOnDemand]: 82/97 looper letters, 133 selfloop transitions, 868 changer transitions 33/1050 dead transitions. [2024-01-29 14:21:30,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1050 transitions, 33052 flow [2024-01-29 14:21:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-29 14:21:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-29 14:21:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 745 transitions. [2024-01-29 14:21:30,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042322300596853 [2024-01-29 14:21:30,302 INFO L175 Difference]: Start difference. First operand has 408 places, 995 transitions, 30500 flow. Second operand 19 states and 745 transitions. [2024-01-29 14:21:30,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1050 transitions, 33052 flow [2024-01-29 14:21:31,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1050 transitions, 32336 flow, removed 98 selfloop flow, removed 23 redundant places. [2024-01-29 14:21:31,046 INFO L231 Difference]: Finished difference. Result has 384 places, 990 transitions, 31754 flow [2024-01-29 14:21:31,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=29817, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=863, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31754, PETRI_PLACES=384, PETRI_TRANSITIONS=990} [2024-01-29 14:21:31,048 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 285 predicate places. [2024-01-29 14:21:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 990 transitions, 31754 flow [2024-01-29 14:21:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:31,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:31,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-29 14:21:31,257 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:31,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash 85537059, now seen corresponding path program 15 times [2024-01-29 14:21:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:31,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605021643] [2024-01-29 14:21:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:31,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:31,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605021643] [2024-01-29 14:21:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605021643] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295825886] [2024-01-29 14:21:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 14:21:31,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:31,351 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:31,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-29 14:21:31,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-29 14:21:31,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:31,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-29 14:21:31,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:31,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295825886] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:31,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-01-29 14:21:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397494209] [2024-01-29 14:21:31,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-29 14:21:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-29 14:21:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-01-29 14:21:32,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:32,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 990 transitions, 31754 flow. Second operand has 21 states, 21 states have (on average 36.285714285714285) internal successors, (762), 21 states have internal predecessors, (762), 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) [2024-01-29 14:21:32,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:32,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:32,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:35,919 INFO L124 PetriNetUnfolderBase]: 3982/9514 cut-off events. [2024-01-29 14:21:35,919 INFO L125 PetriNetUnfolderBase]: For 450134/450345 co-relation queries the response was YES. [2024-01-29 14:21:35,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90858 conditions, 9514 events. 3982/9514 cut-off events. For 450134/450345 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 88796 event pairs, 63 based on Foata normal form. 142/9632 useless extension candidates. Maximal degree in co-relation 90773. Up to 1931 conditions per place. [2024-01-29 14:21:36,037 INFO L140 encePairwiseOnDemand]: 83/97 looper letters, 556 selfloop transitions, 1073 changer transitions 87/1732 dead transitions. [2024-01-29 14:21:36,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1732 transitions, 57853 flow [2024-01-29 14:21:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-29 14:21:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-29 14:21:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1877 transitions. [2024-01-29 14:21:36,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949084788554597 [2024-01-29 14:21:36,039 INFO L175 Difference]: Start difference. First operand has 384 places, 990 transitions, 31754 flow. Second operand 49 states and 1877 transitions. [2024-01-29 14:21:36,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1732 transitions, 57853 flow [2024-01-29 14:21:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1732 transitions, 56635 flow, removed 23 selfloop flow, removed 13 redundant places. [2024-01-29 14:21:38,285 INFO L231 Difference]: Finished difference. Result has 438 places, 1514 transitions, 52417 flow [2024-01-29 14:21:38,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=30963, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=52417, PETRI_PLACES=438, PETRI_TRANSITIONS=1514} [2024-01-29 14:21:38,286 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 339 predicate places. [2024-01-29 14:21:38,286 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1514 transitions, 52417 flow [2024-01-29 14:21:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 36.285714285714285) internal successors, (762), 21 states have internal predecessors, (762), 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) [2024-01-29 14:21:38,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:38,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:38,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:38,498 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:38,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 807203, now seen corresponding path program 16 times [2024-01-29 14:21:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412297963] [2024-01-29 14:21:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:38,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412297963] [2024-01-29 14:21:38,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412297963] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150959521] [2024-01-29 14:21:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-29 14:21:38,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:38,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-29 14:21:38,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-29 14:21:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:38,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-29 14:21:38,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:38,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150959521] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:38,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-29 14:21:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317871015] [2024-01-29 14:21:38,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:38,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 14:21:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 14:21:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-29 14:21:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:21:39,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1514 transitions, 52417 flow. Second operand has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:39,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:39,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:21:39,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:43,345 INFO L124 PetriNetUnfolderBase]: 3904/9310 cut-off events. [2024-01-29 14:21:43,345 INFO L125 PetriNetUnfolderBase]: For 477629/477848 co-relation queries the response was YES. [2024-01-29 14:21:43,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92040 conditions, 9310 events. 3904/9310 cut-off events. For 477629/477848 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 86434 event pairs, 47 based on Foata normal form. 134/9426 useless extension candidates. Maximal degree in co-relation 91935. Up to 1849 conditions per place. [2024-01-29 14:21:43,479 INFO L140 encePairwiseOnDemand]: 83/97 looper letters, 154 selfloop transitions, 1209 changer transitions 211/1590 dead transitions. [2024-01-29 14:21:43,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1590 transitions, 56410 flow [2024-01-29 14:21:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-29 14:21:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-29 14:21:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 813 transitions. [2024-01-29 14:21:43,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39911634756995584 [2024-01-29 14:21:43,480 INFO L175 Difference]: Start difference. First operand has 438 places, 1514 transitions, 52417 flow. Second operand 21 states and 813 transitions. [2024-01-29 14:21:43,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1590 transitions, 56410 flow [2024-01-29 14:21:46,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1590 transitions, 55280 flow, removed 209 selfloop flow, removed 18 redundant places. [2024-01-29 14:21:46,084 INFO L231 Difference]: Finished difference. Result has 434 places, 1354 transitions, 48075 flow [2024-01-29 14:21:46,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=51314, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=48075, PETRI_PLACES=434, PETRI_TRANSITIONS=1354} [2024-01-29 14:21:46,085 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 335 predicate places. [2024-01-29 14:21:46,085 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1354 transitions, 48075 flow [2024-01-29 14:21:46,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2024-01-29 14:21:46,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:46,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:21:46,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-29 14:21:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:46,295 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:46,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1582908403, now seen corresponding path program 17 times [2024-01-29 14:21:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328641725] [2024-01-29 14:21:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:46,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:46,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328641725] [2024-01-29 14:21:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328641725] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:46,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780638211] [2024-01-29 14:21:46,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-29 14:21:46,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:46,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:46,389 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:46,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-29 14:21:46,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:21:46,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:46,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-29 14:21:46,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:46,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780638211] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:46,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-01-29 14:21:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819933164] [2024-01-29 14:21:46,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-29 14:21:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-29 14:21:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-01-29 14:21:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 97 [2024-01-29 14:21:47,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1354 transitions, 48075 flow. Second operand has 22 states, 22 states have (on average 33.59090909090909) internal successors, (739), 22 states have internal predecessors, (739), 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) [2024-01-29 14:21:47,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:47,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 97 [2024-01-29 14:21:47,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:50,784 INFO L124 PetriNetUnfolderBase]: 3449/8502 cut-off events. [2024-01-29 14:21:50,784 INFO L125 PetriNetUnfolderBase]: For 448534/448729 co-relation queries the response was YES. [2024-01-29 14:21:50,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84753 conditions, 8502 events. 3449/8502 cut-off events. For 448534/448729 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 79308 event pairs, 67 based on Foata normal form. 73/8557 useless extension candidates. Maximal degree in co-relation 84657. Up to 1726 conditions per place. [2024-01-29 14:21:50,889 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 712 selfloop transitions, 557 changer transitions 217/1501 dead transitions. [2024-01-29 14:21:50,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1501 transitions, 53708 flow [2024-01-29 14:21:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-29 14:21:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-29 14:21:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 858 transitions. [2024-01-29 14:21:50,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38458090542357687 [2024-01-29 14:21:50,890 INFO L175 Difference]: Start difference. First operand has 434 places, 1354 transitions, 48075 flow. Second operand 23 states and 858 transitions. [2024-01-29 14:21:50,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1501 transitions, 53708 flow [2024-01-29 14:21:52,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1501 transitions, 50073 flow, removed 19 selfloop flow, removed 25 redundant places. [2024-01-29 14:21:52,592 INFO L231 Difference]: Finished difference. Result has 428 places, 1228 transitions, 41195 flow [2024-01-29 14:21:52,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=44789, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=41195, PETRI_PLACES=428, PETRI_TRANSITIONS=1228} [2024-01-29 14:21:52,593 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 329 predicate places. [2024-01-29 14:21:52,593 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1228 transitions, 41195 flow [2024-01-29 14:21:52,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 33.59090909090909) internal successors, (739), 22 states have internal predecessors, (739), 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) [2024-01-29 14:21:52,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:52,594 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, 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] [2024-01-29 14:21:52,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-29 14:21:52,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:52,805 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:52,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 320880620, now seen corresponding path program 18 times [2024-01-29 14:21:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545755612] [2024-01-29 14:21:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:52,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545755612] [2024-01-29 14:21:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545755612] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723991192] [2024-01-29 14:21:52,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-29 14:21:52,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:52,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:52,847 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:52,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-29 14:21:52,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-29 14:21:52,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:21:52,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-29 14:21:52,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:52,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723991192] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:53,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:53,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-29 14:21:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66553606] [2024-01-29 14:21:53,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-29 14:21:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-29 14:21:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-01-29 14:21:53,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:21:53,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1228 transitions, 41195 flow. Second operand has 11 states, 11 states have (on average 43.72727272727273) internal successors, (481), 11 states have internal predecessors, (481), 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) [2024-01-29 14:21:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:53,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:21:53,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:21:56,800 INFO L124 PetriNetUnfolderBase]: 4363/10731 cut-off events. [2024-01-29 14:21:56,808 INFO L125 PetriNetUnfolderBase]: For 495740/496098 co-relation queries the response was YES. [2024-01-29 14:21:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101954 conditions, 10731 events. 4363/10731 cut-off events. For 495740/496098 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 104061 event pairs, 325 based on Foata normal form. 240/10866 useless extension candidates. Maximal degree in co-relation 101861. Up to 2177 conditions per place. [2024-01-29 14:21:57,076 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 825 selfloop transitions, 1105 changer transitions 0/1948 dead transitions. [2024-01-29 14:21:57,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1948 transitions, 66030 flow [2024-01-29 14:21:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-29 14:21:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-29 14:21:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1135 transitions. [2024-01-29 14:21:57,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087404751232631 [2024-01-29 14:21:57,078 INFO L175 Difference]: Start difference. First operand has 428 places, 1228 transitions, 41195 flow. Second operand 23 states and 1135 transitions. [2024-01-29 14:21:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1948 transitions, 66030 flow [2024-01-29 14:21:58,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1948 transitions, 65061 flow, removed 177 selfloop flow, removed 16 redundant places. [2024-01-29 14:21:59,033 INFO L231 Difference]: Finished difference. Result has 434 places, 1673 transitions, 58827 flow [2024-01-29 14:21:59,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=40607, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=58827, PETRI_PLACES=434, PETRI_TRANSITIONS=1673} [2024-01-29 14:21:59,034 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 335 predicate places. [2024-01-29 14:21:59,034 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1673 transitions, 58827 flow [2024-01-29 14:21:59,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 43.72727272727273) internal successors, (481), 11 states have internal predecessors, (481), 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) [2024-01-29 14:21:59,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:21:59,035 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, 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] [2024-01-29 14:21:59,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-29 14:21:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-29 14:21:59,237 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:21:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:21:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1054660938, now seen corresponding path program 19 times [2024-01-29 14:21:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:21:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748014446] [2024-01-29 14:21:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:21:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:21:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:21:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748014446] [2024-01-29 14:21:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748014446] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:21:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227658102] [2024-01-29 14:21:59,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-29 14:21:59,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:21:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:21:59,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:21:59,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-29 14:21:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:21:59,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-29 14:21:59,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:21:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:59,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:21:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:21:59,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227658102] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:21:59,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:21:59,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-01-29 14:21:59,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128338552] [2024-01-29 14:21:59,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:21:59,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-29 14:21:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:21:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-29 14:21:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-29 14:21:59,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2024-01-29 14:21:59,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1673 transitions, 58827 flow. Second operand has 10 states, 10 states have (on average 44.1) internal successors, (441), 10 states have internal predecessors, (441), 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) [2024-01-29 14:21:59,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:21:59,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2024-01-29 14:21:59,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:22:05,710 INFO L124 PetriNetUnfolderBase]: 5736/14265 cut-off events. [2024-01-29 14:22:05,710 INFO L125 PetriNetUnfolderBase]: For 753933/754441 co-relation queries the response was YES. [2024-01-29 14:22:05,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141751 conditions, 14265 events. 5736/14265 cut-off events. For 753933/754441 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 145465 event pairs, 428 based on Foata normal form. 300/14464 useless extension candidates. Maximal degree in co-relation 141655. Up to 3091 conditions per place. [2024-01-29 14:22:05,930 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 871 selfloop transitions, 1401 changer transitions 0/2290 dead transitions. [2024-01-29 14:22:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2290 transitions, 83663 flow [2024-01-29 14:22:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-29 14:22:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-29 14:22:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 916 transitions. [2024-01-29 14:22:05,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49701573521432446 [2024-01-29 14:22:05,932 INFO L175 Difference]: Start difference. First operand has 434 places, 1673 transitions, 58827 flow. Second operand 19 states and 916 transitions. [2024-01-29 14:22:05,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2290 transitions, 83663 flow [2024-01-29 14:22:10,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2290 transitions, 82316 flow, removed 404 selfloop flow, removed 5 redundant places. [2024-01-29 14:22:10,488 INFO L231 Difference]: Finished difference. Result has 455 places, 2123 transitions, 79358 flow [2024-01-29 14:22:10,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=57757, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=983, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=79358, PETRI_PLACES=455, PETRI_TRANSITIONS=2123} [2024-01-29 14:22:10,489 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 356 predicate places. [2024-01-29 14:22:10,489 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 2123 transitions, 79358 flow [2024-01-29 14:22:10,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.1) internal successors, (441), 10 states have internal predecessors, (441), 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) [2024-01-29 14:22:10,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:22:10,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:22:10,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-29 14:22:10,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:10,695 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:22:10,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:22:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash 833610921, now seen corresponding path program 20 times [2024-01-29 14:22:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:22:10,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386496141] [2024-01-29 14:22:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:22:10,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:22:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:22:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:10,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:22:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386496141] [2024-01-29 14:22:10,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386496141] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:22:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231784702] [2024-01-29 14:22:10,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 14:22:10,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:22:10,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:22:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-29 14:22:10,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:22:10,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:22:10,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-29 14:22:10,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:22:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:11,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:22:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231784702] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:22:11,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:22:11,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2024-01-29 14:22:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475965902] [2024-01-29 14:22:11,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:22:11,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-29 14:22:11,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:22:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-29 14:22:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-01-29 14:22:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-01-29 14:22:11,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 2123 transitions, 79358 flow. Second operand has 29 states, 29 states have (on average 35.827586206896555) internal successors, (1039), 29 states have internal predecessors, (1039), 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) [2024-01-29 14:22:11,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:22:11,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-01-29 14:22:11,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:22:20,889 INFO L124 PetriNetUnfolderBase]: 6948/17489 cut-off events. [2024-01-29 14:22:20,889 INFO L125 PetriNetUnfolderBase]: For 994220/994992 co-relation queries the response was YES. [2024-01-29 14:22:21,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177770 conditions, 17489 events. 6948/17489 cut-off events. For 994220/994992 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 182680 event pairs, 112 based on Foata normal form. 549/18038 useless extension candidates. Maximal degree in co-relation 177666. Up to 3681 conditions per place. [2024-01-29 14:22:21,083 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 225 selfloop transitions, 643 changer transitions 1709/2593 dead transitions. [2024-01-29 14:22:21,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2593 transitions, 99537 flow [2024-01-29 14:22:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-29 14:22:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-29 14:22:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1280 transitions. [2024-01-29 14:22:21,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998750390502968 [2024-01-29 14:22:21,085 INFO L175 Difference]: Start difference. First operand has 455 places, 2123 transitions, 79358 flow. Second operand 33 states and 1280 transitions. [2024-01-29 14:22:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2593 transitions, 99537 flow [2024-01-29 14:22:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2593 transitions, 99348 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-01-29 14:22:29,050 INFO L231 Difference]: Finished difference. Result has 488 places, 842 transitions, 30492 flow [2024-01-29 14:22:29,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=79201, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30492, PETRI_PLACES=488, PETRI_TRANSITIONS=842} [2024-01-29 14:22:29,052 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 389 predicate places. [2024-01-29 14:22:29,052 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 842 transitions, 30492 flow [2024-01-29 14:22:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 35.827586206896555) internal successors, (1039), 29 states have internal predecessors, (1039), 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) [2024-01-29 14:22:29,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:22:29,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:22:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-29 14:22:29,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:29,253 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:22:29,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:22:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash -961120667, now seen corresponding path program 21 times [2024-01-29 14:22:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:22:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391207718] [2024-01-29 14:22:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:22:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:22:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:22:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:29,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:22:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391207718] [2024-01-29 14:22:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391207718] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:22:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404373325] [2024-01-29 14:22:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 14:22:29,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:29,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:22:29,368 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:22:29,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-29 14:22:29,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-29 14:22:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:22:29,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:22:29,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:22:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-29 14:22:29,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:22:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-29 14:22:29,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404373325] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:22:29,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:22:29,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2024-01-29 14:22:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553247957] [2024-01-29 14:22:29,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:22:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-29 14:22:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:22:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-29 14:22:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-01-29 14:22:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-01-29 14:22:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 842 transitions, 30492 flow. Second operand has 21 states, 21 states have (on average 40.285714285714285) internal successors, (846), 21 states have internal predecessors, (846), 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) [2024-01-29 14:22:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:22:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-01-29 14:22:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:22:32,953 INFO L124 PetriNetUnfolderBase]: 2632/7199 cut-off events. [2024-01-29 14:22:32,953 INFO L125 PetriNetUnfolderBase]: For 397926/398314 co-relation queries the response was YES. [2024-01-29 14:22:33,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67271 conditions, 7199 events. 2632/7199 cut-off events. For 397926/398314 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 68925 event pairs, 83 based on Foata normal form. 299/7492 useless extension candidates. Maximal degree in co-relation 67161. Up to 1423 conditions per place. [2024-01-29 14:22:33,033 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 114 selfloop transitions, 126 changer transitions 735/993 dead transitions. [2024-01-29 14:22:33,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 993 transitions, 35400 flow [2024-01-29 14:22:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-29 14:22:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-29 14:22:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1939 transitions. [2024-01-29 14:22:33,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42531256854573374 [2024-01-29 14:22:33,036 INFO L175 Difference]: Start difference. First operand has 488 places, 842 transitions, 30492 flow. Second operand 47 states and 1939 transitions. [2024-01-29 14:22:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 993 transitions, 35400 flow [2024-01-29 14:22:34,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 993 transitions, 30827 flow, removed 174 selfloop flow, removed 77 redundant places. [2024-01-29 14:22:34,709 INFO L231 Difference]: Finished difference. Result has 428 places, 218 transitions, 4751 flow [2024-01-29 14:22:34,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=26219, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4751, PETRI_PLACES=428, PETRI_TRANSITIONS=218} [2024-01-29 14:22:34,711 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 329 predicate places. [2024-01-29 14:22:34,711 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 218 transitions, 4751 flow [2024-01-29 14:22:34,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 40.285714285714285) internal successors, (846), 21 states have internal predecessors, (846), 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) [2024-01-29 14:22:34,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:22:34,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:22:34,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-29 14:22:34,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:34,923 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:22:34,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:22:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash -888393545, now seen corresponding path program 22 times [2024-01-29 14:22:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:22:34,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914247502] [2024-01-29 14:22:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:22:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:22:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:22:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:22:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914247502] [2024-01-29 14:22:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914247502] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:22:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795931024] [2024-01-29 14:22:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-29 14:22:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:22:35,075 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:22:35,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-29 14:22:35,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-29 14:22:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:22:35,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-29 14:22:35,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:22:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:35,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:22:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795931024] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:22:35,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:22:35,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-29 14:22:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393937350] [2024-01-29 14:22:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:22:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-29 14:22:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:22:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-29 14:22:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-01-29 14:22:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 97 [2024-01-29 14:22:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 218 transitions, 4751 flow. Second operand has 29 states, 29 states have (on average 33.86206896551724) internal successors, (982), 29 states have internal predecessors, (982), 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) [2024-01-29 14:22:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:22:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 97 [2024-01-29 14:22:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:22:36,607 INFO L124 PetriNetUnfolderBase]: 547/1769 cut-off events. [2024-01-29 14:22:36,607 INFO L125 PetriNetUnfolderBase]: For 48902/48962 co-relation queries the response was YES. [2024-01-29 14:22:36,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 1769 events. 547/1769 cut-off events. For 48902/48962 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12523 event pairs, 30 based on Foata normal form. 49/1818 useless extension candidates. Maximal degree in co-relation 11818. Up to 324 conditions per place. [2024-01-29 14:22:36,619 INFO L140 encePairwiseOnDemand]: 82/97 looper letters, 67 selfloop transitions, 79 changer transitions 140/301 dead transitions. [2024-01-29 14:22:36,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 301 transitions, 6372 flow [2024-01-29 14:22:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-29 14:22:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-29 14:22:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 903 transitions. [2024-01-29 14:22:36,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37237113402061855 [2024-01-29 14:22:36,621 INFO L175 Difference]: Start difference. First operand has 428 places, 218 transitions, 4751 flow. Second operand 25 states and 903 transitions. [2024-01-29 14:22:36,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 301 transitions, 6372 flow [2024-01-29 14:22:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 301 transitions, 4609 flow, removed 110 selfloop flow, removed 96 redundant places. [2024-01-29 14:22:36,832 INFO L231 Difference]: Finished difference. Result has 277 places, 139 transitions, 2018 flow [2024-01-29 14:22:36,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2018, PETRI_PLACES=277, PETRI_TRANSITIONS=139} [2024-01-29 14:22:36,837 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 178 predicate places. [2024-01-29 14:22:36,837 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 139 transitions, 2018 flow [2024-01-29 14:22:36,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 33.86206896551724) internal successors, (982), 29 states have internal predecessors, (982), 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) [2024-01-29 14:22:36,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:22:36,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:22:36,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-29 14:22:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:37,040 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 84 more)] === [2024-01-29 14:22:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:22:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1001220397, now seen corresponding path program 23 times [2024-01-29 14:22:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:22:37,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563529432] [2024-01-29 14:22:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:22:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:22:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:22:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:22:37,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:22:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563529432] [2024-01-29 14:22:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563529432] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:22:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986459744] [2024-01-29 14:22:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-29 14:22:37,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:22:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:22:37,166 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:22:37,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-29 14:22:37,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-29 14:22:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:22:37,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:22:37,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:22:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-29 14:22:37,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-29 14:22:37,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986459744] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:22:37,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-29 14:22:37,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2024-01-29 14:22:37,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715543401] [2024-01-29 14:22:37,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:22:37,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-29 14:22:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:22:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-29 14:22:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-01-29 14:22:37,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 97 [2024-01-29 14:22:37,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 139 transitions, 2018 flow. Second operand has 8 states, 8 states have (on average 45.875) internal successors, (367), 8 states have internal predecessors, (367), 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) [2024-01-29 14:22:37,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:22:37,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 97 [2024-01-29 14:22:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:22:37,557 INFO L124 PetriNetUnfolderBase]: 244/772 cut-off events. [2024-01-29 14:22:37,558 INFO L125 PetriNetUnfolderBase]: For 11763/11810 co-relation queries the response was YES. [2024-01-29 14:22:37,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 772 events. 244/772 cut-off events. For 11763/11810 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3980 event pairs, 32 based on Foata normal form. 10/779 useless extension candidates. Maximal degree in co-relation 4225. Up to 159 conditions per place. [2024-01-29 14:22:37,562 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 0 selfloop transitions, 0 changer transitions 144/144 dead transitions. [2024-01-29 14:22:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 144 transitions, 2296 flow [2024-01-29 14:22:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 14:22:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 14:22:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 380 transitions. [2024-01-29 14:22:37,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2024-01-29 14:22:37,563 INFO L175 Difference]: Start difference. First operand has 277 places, 139 transitions, 2018 flow. Second operand 8 states and 380 transitions. [2024-01-29 14:22:37,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 144 transitions, 2296 flow [2024-01-29 14:22:37,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 144 transitions, 1772 flow, removed 18 selfloop flow, removed 41 redundant places. [2024-01-29 14:22:37,579 INFO L231 Difference]: Finished difference. Result has 193 places, 0 transitions, 0 flow [2024-01-29 14:22:37,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=193, PETRI_TRANSITIONS=0} [2024-01-29 14:22:37,580 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 94 predicate places. [2024-01-29 14:22:37,580 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 0 transitions, 0 flow [2024-01-29 14:22:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 45.875) internal successors, (367), 8 states have internal predecessors, (367), 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) [2024-01-29 14:22:37,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (86 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (85 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (84 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (83 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (82 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (81 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (80 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (79 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (78 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (77 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (76 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (75 of 87 remaining) [2024-01-29 14:22:37,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (74 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err13ASSERT_VIOLATIONWITNESS_INVARIANT (73 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err14ASSERT_VIOLATIONWITNESS_INVARIANT (72 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err15ASSERT_VIOLATIONWITNESS_INVARIANT (71 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err16ASSERT_VIOLATIONWITNESS_INVARIANT (70 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err17ASSERT_VIOLATIONWITNESS_INVARIANT (69 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err18ASSERT_VIOLATIONWITNESS_INVARIANT (68 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (67 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (66 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (65 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (64 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (63 of 87 remaining) [2024-01-29 14:22:37,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (62 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (61 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (60 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (59 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err9ASSERT_VIOLATIONWITNESS_INVARIANT (58 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err10ASSERT_VIOLATIONWITNESS_INVARIANT (57 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err11ASSERT_VIOLATIONWITNESS_INVARIANT (56 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err12ASSERT_VIOLATIONWITNESS_INVARIANT (55 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err13ASSERT_VIOLATIONWITNESS_INVARIANT (54 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err14ASSERT_VIOLATIONWITNESS_INVARIANT (53 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err15ASSERT_VIOLATIONWITNESS_INVARIANT (52 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err16ASSERT_VIOLATIONWITNESS_INVARIANT (51 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err17ASSERT_VIOLATIONWITNESS_INVARIANT (50 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err18ASSERT_VIOLATIONWITNESS_INVARIANT (49 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (48 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 87 remaining) [2024-01-29 14:22:37,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (40 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 87 remaining) [2024-01-29 14:22:37,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err13ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err14ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err15ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err16ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err17ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err18ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 87 remaining) [2024-01-29 14:22:37,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err9ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err10ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err11ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err12ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err13ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err14ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err15ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err16ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err17ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 87 remaining) [2024-01-29 14:22:37,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err18ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 87 remaining) [2024-01-29 14:22:37,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-29 14:22:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-01-29 14:22:37,789 INFO L445 BasicCegarLoop]: Path program histogram: [23, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:22:37,794 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-29 14:22:37,794 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-29 14:22:37,797 INFO L503 ceAbstractionStarter]: Automizer considered 46 witness invariants [2024-01-29 14:22:37,797 INFO L504 ceAbstractionStarter]: WitnessConsidered=46 [2024-01-29 14:22:37,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.01 02:22:37 BasicIcfg [2024-01-29 14:22:37,798 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-29 14:22:37,798 INFO L158 Benchmark]: Toolchain (without parser) took 124815.14ms. Allocated memory was 153.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 102.8MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2024-01-29 14:22:37,798 INFO L158 Benchmark]: Witness Parser took 0.09ms. Allocated memory is still 102.8MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-29 14:22:37,798 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 102.8MB. Free memory is still 64.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-29 14:22:37,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.96ms. Allocated memory is still 153.1MB. Free memory was 102.8MB in the beginning and 85.0MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-01-29 14:22:37,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.81ms. Allocated memory is still 153.1MB. Free memory was 85.0MB in the beginning and 84.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-29 14:22:37,798 INFO L158 Benchmark]: Boogie Preprocessor took 49.40ms. Allocated memory is still 153.1MB. Free memory was 84.0MB in the beginning and 81.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-29 14:22:37,799 INFO L158 Benchmark]: RCFGBuilder took 627.65ms. Allocated memory is still 153.1MB. Free memory was 81.9MB in the beginning and 89.3MB in the end (delta: -7.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-01-29 14:22:37,799 INFO L158 Benchmark]: TraceAbstraction took 123858.60ms. Allocated memory was 153.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 88.3MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2024-01-29 14:22:37,800 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.09ms. Allocated memory is still 102.8MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 102.8MB. Free memory is still 64.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.96ms. Allocated memory is still 153.1MB. Free memory was 102.8MB in the beginning and 85.0MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.81ms. Allocated memory is still 153.1MB. Free memory was 85.0MB in the beginning and 84.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.40ms. Allocated memory is still 153.1MB. Free memory was 84.0MB in the beginning and 81.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 627.65ms. Allocated memory is still 153.1MB. Free memory was 81.9MB in the beginning and 89.3MB in the end (delta: -7.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 123858.60ms. Allocated memory was 153.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 88.3MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 57]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 57]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 63]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 63]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 63]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 73]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 166 locations, 87 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 123.7s, OverallIterations: 55, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 104.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12494 SdHoareTripleChecker+Valid, 19.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11109 mSDsluCounter, 7898 SdHoareTripleChecker+Invalid, 16.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7439 mSDsCounter, 1946 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54498 IncrementalHoareTripleChecker+Invalid, 56444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1946 mSolverCounterUnsat, 459 mSDtfsCounter, 54498 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3344 GetRequests, 2158 SyntacticMatches, 23 SemanticMatches, 1163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12366 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79358occurred in iteration=51, InterpolantAutomatonStates: 888, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 3427 NumberOfCodeBlocks, 3419 NumberOfCodeBlocksAsserted, 107 NumberOfCheckSat, 4452 ConstructedInterpolants, 0 QuantifiedInterpolants, 23737 SizeOfPredicates, 85 NumberOfNonLiveVariables, 4698 ConjunctsInSsa, 278 ConjunctsInUnsatCore, 103 InterpolantComputations, 33 PerfectInterpolantSequences, 60/288 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 47 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-29 14:22:37,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE