./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:26:30,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:26:30,136 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:26:30,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:26:30,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:26:30,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:26:30,165 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:26:30,165 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:26:30,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:26:30,170 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:26:30,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:26:30,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:26:30,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:26:30,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:26:30,173 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:26:30,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:26:30,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:26:30,174 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:26:30,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:26:30,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:26:30,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:26:30,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:26:30,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:26:30,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:26:30,176 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:26:30,177 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:26:30,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:26:30,177 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:26:30,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:26:30,178 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:26:30,178 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:26:30,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:26:30,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:30,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:26:30,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:26:30,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:26:30,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:26:30,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:26:30,181 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:26:30,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:26:30,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:26:30,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:26:30,479 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:26:30,479 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:26:30,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml [2024-02-05 10:26:30,638 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:26:30,638 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:26:30,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-05 10:26:31,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:26:31,925 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:26:31,926 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-05 10:26:31,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea7133ea/01ebf7f8aa9643ada17f7625416153c3/FLAG314dfe085 [2024-02-05 10:26:31,966 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea7133ea/01ebf7f8aa9643ada17f7625416153c3 [2024-02-05 10:26:31,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:26:31,968 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:26:31,970 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:31,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:26:31,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:26:31,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:30" (1/2) ... [2024-02-05 10:26:31,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46002139 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:31, skipping insertion in model container [2024-02-05 10:26:31,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:30" (1/2) ... [2024-02-05 10:26:31,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14868a89 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:31, skipping insertion in model container [2024-02-05 10:26:31,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:31" (2/2) ... [2024-02-05 10:26:31,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46002139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:31, skipping insertion in model container [2024-02-05 10:26:31,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:31" (2/2) ... [2024-02-05 10:26:31,979 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:26:32,239 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:26:32,240 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-05 10:26:32,240 INFO L101 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-02-05 10:26:32,240 INFO L101 nessWitnessExtractor]: Location invariant before [L708-L708] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-05 10:26:32,240 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-05 10:26:32,256 INFO L101 nessWitnessExtractor]: Location invariant before [L714-L714] (((a == 1) && (b == 2)) && (c == 3)) && (temp == 0) [2024-02-05 10:26:32,256 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-02-05 10:26:32,256 INFO L101 nessWitnessExtractor]: Loop invariant at [L693-L693] (unsigned long )arg == 0UL [2024-02-05 10:26:32,256 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L694] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Location invariant before [L697-L697] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Loop invariant at [L704-L704] (unsigned long )arg == 0UL [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Location invariant after [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-02-05 10:26:32,257 INFO L101 nessWitnessExtractor]: Location invariant before [L698-L698] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-05 10:26:32,307 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:26:32,621 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2024-02-05 10:26:32,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:32,635 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:26:32,738 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:26:32,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:32,781 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:26:32,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32 WrapperNode [2024-02-05 10:26:32,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:32,783 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:32,783 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:26:32,783 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:26:32,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,830 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-02-05 10:26:32,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:32,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:26:32,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:26:32,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:26:32,840 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,843 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,867 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-02-05 10:26:32,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:26:32,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:26:32,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:26:32,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:26:32,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (1/1) ... [2024-02-05 10:26:32,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:26:32,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-05 10:26:32,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-05 10:26:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-02-05 10:26:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-02-05 10:26:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-05 10:26:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-05 10:26:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:26:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:26:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:26:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:26:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:26:32,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:26:32,959 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:26:33,060 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:26:33,062 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:26:33,342 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:26:33,342 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:26:33,409 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:26:33,410 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-05 10:26:33,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:33 BoogieIcfgContainer [2024-02-05 10:26:33,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:26:33,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:26:33,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:26:33,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:26:33,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:30" (1/4) ... [2024-02-05 10:26:33,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b2873 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:26:33, skipping insertion in model container [2024-02-05 10:26:33,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:26:31" (2/4) ... [2024-02-05 10:26:33,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:26:33, skipping insertion in model container [2024-02-05 10:26:33,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:32" (3/4) ... [2024-02-05 10:26:33,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:26:33, skipping insertion in model container [2024-02-05 10:26:33,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:33" (4/4) ... [2024-02-05 10:26:33,420 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-02-05 10:26:33,435 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:26:33,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-05 10:26:33,436 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:26:33,522 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:33,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 118 flow [2024-02-05 10:26:33,576 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2024-02-05 10:26:33,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:33,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 56 events. 4/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-02-05 10:26:33,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 118 flow [2024-02-05 10:26:33,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 54 transitions, 115 flow [2024-02-05 10:26:33,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:33,600 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;@41c1fd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:33,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-02-05 10:26:33,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:33,603 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:26:33,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:33,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:33,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:26:33,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:33,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:33,610 INFO L85 PathProgramCache]: Analyzing trace with hash 7733, now seen corresponding path program 1 times [2024-02-05 10:26:33,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:33,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917492851] [2024-02-05 10:26:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:33,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917492851] [2024-02-05 10:26:33,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917492851] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:33,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:33,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:26:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378908240] [2024-02-05 10:26:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:33,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2024-02-05 10:26:33,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:33,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:33,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2024-02-05 10:26:33,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:34,078 INFO L124 PetriNetUnfolderBase]: 151/477 cut-off events. [2024-02-05 10:26:34,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:34,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 477 events. 151/477 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2916 event pairs, 40 based on Foata normal form. 108/517 useless extension candidates. Maximal degree in co-relation 740. Up to 213 conditions per place. [2024-02-05 10:26:34,086 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 21 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-02-05 10:26:34,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 159 flow [2024-02-05 10:26:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-02-05 10:26:34,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7696969696969697 [2024-02-05 10:26:34,100 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 115 flow. Second operand 3 states and 127 transitions. [2024-02-05 10:26:34,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 159 flow [2024-02-05 10:26:34,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:34,107 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 112 flow [2024-02-05 10:26:34,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-02-05 10:26:34,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-02-05 10:26:34,112 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 112 flow [2024-02-05 10:26:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:34,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:34,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:26:34,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:34,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash 230687754, now seen corresponding path program 1 times [2024-02-05 10:26:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:34,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235968998] [2024-02-05 10:26:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:34,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:34,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235968998] [2024-02-05 10:26:34,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235968998] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:34,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:34,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183968291] [2024-02-05 10:26:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:34,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:34,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2024-02-05 10:26:34,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:34,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2024-02-05 10:26:34,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:34,379 INFO L124 PetriNetUnfolderBase]: 155/514 cut-off events. [2024-02-05 10:26:34,380 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-05 10:26:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 514 events. 155/514 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2914 event pairs, 56 based on Foata normal form. 54/507 useless extension candidates. Maximal degree in co-relation 817. Up to 213 conditions per place. [2024-02-05 10:26:34,382 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 26 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-02-05 10:26:34,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 194 flow [2024-02-05 10:26:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-02-05 10:26:34,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-02-05 10:26:34,397 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 112 flow. Second operand 4 states and 152 transitions. [2024-02-05 10:26:34,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 194 flow [2024-02-05 10:26:34,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:34,399 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 110 flow [2024-02-05 10:26:34,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-02-05 10:26:34,399 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-02-05 10:26:34,399 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 110 flow [2024-02-05 10:26:34,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:34,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:34,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:34,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:26:34,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:34,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 289546038, now seen corresponding path program 1 times [2024-02-05 10:26:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802702446] [2024-02-05 10:26:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:34,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:34,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:34,430 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:34,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-02-05 10:26:34,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-02-05 10:26:34,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-02-05 10:26:34,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-02-05 10:26:34,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-02-05 10:26:34,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-02-05 10:26:34,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-02-05 10:26:34,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-02-05 10:26:34,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-02-05 10:26:34,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (15 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-02-05 10:26:34,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 29 remaining) [2024-02-05 10:26:34,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-02-05 10:26:34,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-02-05 10:26:34,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-02-05 10:26:34,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-02-05 10:26:34,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-02-05 10:26:34,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 29 remaining) [2024-02-05 10:26:34,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-02-05 10:26:34,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (0 of 29 remaining) [2024-02-05 10:26:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:26:34,437 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-05 10:26:34,439 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:34,439 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-05 10:26:34,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:34,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 101 transitions, 222 flow [2024-02-05 10:26:34,507 INFO L124 PetriNetUnfolderBase]: 5/81 cut-off events. [2024-02-05 10:26:34,507 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:26:34,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 81 events. 5/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 235 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 88. Up to 3 conditions per place. [2024-02-05 10:26:34,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 101 transitions, 222 flow [2024-02-05 10:26:34,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 165 flow [2024-02-05 10:26:34,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:34,511 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;@41c1fd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:34,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-02-05 10:26:34,514 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:34,514 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:26:34,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:34,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:34,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:26:34,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-05 10:26:34,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 10965, now seen corresponding path program 1 times [2024-02-05 10:26:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301308287] [2024-02-05 10:26:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:34,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301308287] [2024-02-05 10:26:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301308287] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:34,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:26:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030128527] [2024-02-05 10:26:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:34,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 101 [2024-02-05 10:26:34,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:34,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:34,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 101 [2024-02-05 10:26:34,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:35,119 INFO L124 PetriNetUnfolderBase]: 2096/4630 cut-off events. [2024-02-05 10:26:35,119 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-02-05 10:26:35,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 4630 events. 2096/4630 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39189 event pairs, 631 based on Foata normal form. 1092/5294 useless extension candidates. Maximal degree in co-relation 7732. Up to 2860 conditions per place. [2024-02-05 10:26:35,154 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 31 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-02-05 10:26:35,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 240 flow [2024-02-05 10:26:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2024-02-05 10:26:35,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7491749174917491 [2024-02-05 10:26:35,159 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 165 flow. Second operand 3 states and 227 transitions. [2024-02-05 10:26:35,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 240 flow [2024-02-05 10:26:35,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:35,162 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 167 flow [2024-02-05 10:26:35,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-02-05 10:26:35,164 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -4 predicate places. [2024-02-05 10:26:35,165 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 167 flow [2024-02-05 10:26:35,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:35,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:35,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:35,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:26:35,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-05 10:26:35,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash 327116476, now seen corresponding path program 1 times [2024-02-05 10:26:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:35,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47923984] [2024-02-05 10:26:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:35,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47923984] [2024-02-05 10:26:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47923984] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:35,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142472644] [2024-02-05 10:26:35,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:35,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-02-05 10:26:35,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:35,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:35,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-02-05 10:26:35,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:35,731 INFO L124 PetriNetUnfolderBase]: 1910/4675 cut-off events. [2024-02-05 10:26:35,731 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-02-05 10:26:35,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7917 conditions, 4675 events. 1910/4675 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 39669 event pairs, 921 based on Foata normal form. 366/4449 useless extension candidates. Maximal degree in co-relation 7902. Up to 2267 conditions per place. [2024-02-05 10:26:35,822 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 42 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-02-05 10:26:35,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 307 flow [2024-02-05 10:26:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2024-02-05 10:26:35,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7178217821782178 [2024-02-05 10:26:35,824 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 167 flow. Second operand 4 states and 290 transitions. [2024-02-05 10:26:35,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 307 flow [2024-02-05 10:26:35,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:35,826 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 164 flow [2024-02-05 10:26:35,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2024-02-05 10:26:35,826 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -4 predicate places. [2024-02-05 10:26:35,827 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 164 flow [2024-02-05 10:26:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:35,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:35,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:35,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:26:35,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-05 10:26:35,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1771280481, now seen corresponding path program 1 times [2024-02-05 10:26:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:35,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615087206] [2024-02-05 10:26:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:35,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615087206] [2024-02-05 10:26:35,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615087206] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:35,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:35,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:35,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235095888] [2024-02-05 10:26:35,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:35,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:35,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:35,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-02-05 10:26:35,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:35,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:35,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-02-05 10:26:35,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:36,402 INFO L124 PetriNetUnfolderBase]: 1618/4037 cut-off events. [2024-02-05 10:26:36,403 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-02-05 10:26:36,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6783 conditions, 4037 events. 1618/4037 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 34719 event pairs, 310 based on Foata normal form. 320/3989 useless extension candidates. Maximal degree in co-relation 6767. Up to 2130 conditions per place. [2024-02-05 10:26:36,434 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 38 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-02-05 10:26:36,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 279 flow [2024-02-05 10:26:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-02-05 10:26:36,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7103960396039604 [2024-02-05 10:26:36,436 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 164 flow. Second operand 4 states and 287 transitions. [2024-02-05 10:26:36,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 279 flow [2024-02-05 10:26:36,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:36,439 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 161 flow [2024-02-05 10:26:36,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-02-05 10:26:36,441 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -5 predicate places. [2024-02-05 10:26:36,441 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 161 flow [2024-02-05 10:26:36,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:36,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:36,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:26:36,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-05 10:26:36,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1429760855, now seen corresponding path program 1 times [2024-02-05 10:26:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68578898] [2024-02-05 10:26:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:36,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68578898] [2024-02-05 10:26:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68578898] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:36,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:36,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:36,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482166774] [2024-02-05 10:26:36,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:36,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 101 [2024-02-05 10:26:36,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:36,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:36,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 101 [2024-02-05 10:26:36,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:38,002 INFO L124 PetriNetUnfolderBase]: 7475/14333 cut-off events. [2024-02-05 10:26:38,002 INFO L125 PetriNetUnfolderBase]: For 1208/1208 co-relation queries the response was YES. [2024-02-05 10:26:38,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26288 conditions, 14333 events. 7475/14333 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 121362 event pairs, 2189 based on Foata normal form. 0/12938 useless extension candidates. Maximal degree in co-relation 26273. Up to 9949 conditions per place. [2024-02-05 10:26:38,076 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 52 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-02-05 10:26:38,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 88 transitions, 341 flow [2024-02-05 10:26:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2024-02-05 10:26:38,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336633663366337 [2024-02-05 10:26:38,078 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 161 flow. Second operand 4 states and 256 transitions. [2024-02-05 10:26:38,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 88 transitions, 341 flow [2024-02-05 10:26:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:38,080 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 193 flow [2024-02-05 10:26:38,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-02-05 10:26:38,081 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -2 predicate places. [2024-02-05 10:26:38,081 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 193 flow [2024-02-05 10:26:38,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:38,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:38,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:38,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:26:38,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-05 10:26:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1706070103, now seen corresponding path program 1 times [2024-02-05 10:26:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421799191] [2024-02-05 10:26:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:38,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:38,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:38,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:38,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2024-02-05 10:26:38,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 42 remaining) [2024-02-05 10:26:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 42 remaining) [2024-02-05 10:26:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 42 remaining) [2024-02-05 10:26:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 42 remaining) [2024-02-05 10:26:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 42 remaining) [2024-02-05 10:26:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 42 remaining) [2024-02-05 10:26:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (28 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (26 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 42 remaining) [2024-02-05 10:26:38,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 42 remaining) [2024-02-05 10:26:38,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 42 remaining) [2024-02-05 10:26:38,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 42 remaining) [2024-02-05 10:26:38,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 42 remaining) [2024-02-05 10:26:38,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 42 remaining) [2024-02-05 10:26:38,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 42 remaining) [2024-02-05 10:26:38,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 42 remaining) [2024-02-05 10:26:38,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (6 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 42 remaining) [2024-02-05 10:26:38,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (0 of 42 remaining) [2024-02-05 10:26:38,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:26:38,110 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-02-05 10:26:38,110 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:38,110 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-05 10:26:38,178 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 147 transitions, 330 flow [2024-02-05 10:26:38,191 INFO L124 PetriNetUnfolderBase]: 6/106 cut-off events. [2024-02-05 10:26:38,191 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-05 10:26:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 106 events. 6/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 353 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2024-02-05 10:26:38,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 147 transitions, 330 flow [2024-02-05 10:26:38,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 98 transitions, 217 flow [2024-02-05 10:26:38,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:38,194 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;@41c1fd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:38,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-02-05 10:26:38,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:38,195 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:26:38,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:38,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:38,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:26:38,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-05 10:26:38,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 15669, now seen corresponding path program 1 times [2024-02-05 10:26:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:38,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293379140] [2024-02-05 10:26:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293379140] [2024-02-05 10:26:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293379140] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:26:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089324840] [2024-02-05 10:26:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:38,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 147 [2024-02-05 10:26:38,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:38,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:38,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 147 [2024-02-05 10:26:38,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:42,253 INFO L124 PetriNetUnfolderBase]: 23551/42849 cut-off events. [2024-02-05 10:26:42,254 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2024-02-05 10:26:42,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74680 conditions, 42849 events. 23551/42849 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 417965 event pairs, 9184 based on Foata normal form. 10405/50293 useless extension candidates. Maximal degree in co-relation 74666. Up to 30303 conditions per place. [2024-02-05 10:26:42,766 INFO L140 encePairwiseOnDemand]: 134/147 looper letters, 41 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2024-02-05 10:26:42,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 325 flow [2024-02-05 10:26:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2024-02-05 10:26:42,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7414965986394558 [2024-02-05 10:26:42,769 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 217 flow. Second operand 3 states and 327 transitions. [2024-02-05 10:26:42,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 325 flow [2024-02-05 10:26:42,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:42,774 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 222 flow [2024-02-05 10:26:42,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-02-05 10:26:42,775 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-02-05 10:26:42,775 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 222 flow [2024-02-05 10:26:42,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:42,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:42,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:42,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:26:42,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-05 10:26:42,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash 467443964, now seen corresponding path program 1 times [2024-02-05 10:26:42,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:42,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358374363] [2024-02-05 10:26:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358374363] [2024-02-05 10:26:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358374363] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:42,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868923009] [2024-02-05 10:26:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:42,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:42,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:42,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-02-05 10:26:42,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:42,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:42,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-02-05 10:26:42,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:46,367 INFO L124 PetriNetUnfolderBase]: 19362/39182 cut-off events. [2024-02-05 10:26:46,367 INFO L125 PetriNetUnfolderBase]: For 3749/3749 co-relation queries the response was YES. [2024-02-05 10:26:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68668 conditions, 39182 events. 19362/39182 cut-off events. For 3749/3749 co-relation queries the response was YES. Maximal size of possible extension queue 1650. Compared 410360 event pairs, 11069 based on Foata normal form. 2466/36921 useless extension candidates. Maximal degree in co-relation 68652. Up to 20920 conditions per place. [2024-02-05 10:26:46,621 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 58 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-02-05 10:26:46,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 117 transitions, 420 flow [2024-02-05 10:26:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2024-02-05 10:26:46,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-02-05 10:26:46,623 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 222 flow. Second operand 4 states and 428 transitions. [2024-02-05 10:26:46,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 117 transitions, 420 flow [2024-02-05 10:26:46,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 117 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:46,628 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 218 flow [2024-02-05 10:26:46,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2024-02-05 10:26:46,629 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-02-05 10:26:46,629 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 218 flow [2024-02-05 10:26:46,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:46,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:46,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:46,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:26:46,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-05 10:26:46,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash -484366144, now seen corresponding path program 1 times [2024-02-05 10:26:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:46,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053097614] [2024-02-05 10:26:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053097614] [2024-02-05 10:26:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053097614] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:46,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87503541] [2024-02-05 10:26:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:46,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:46,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-02-05 10:26:46,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:46,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:46,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-02-05 10:26:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:49,846 INFO L124 PetriNetUnfolderBase]: 16922/34924 cut-off events. [2024-02-05 10:26:49,846 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2024-02-05 10:26:49,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60771 conditions, 34924 events. 16922/34924 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 372229 event pairs, 4955 based on Foata normal form. 2476/33981 useless extension candidates. Maximal degree in co-relation 60754. Up to 19986 conditions per place. [2024-02-05 10:26:50,088 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 54 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-02-05 10:26:50,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 390 flow [2024-02-05 10:26:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-02-05 10:26:50,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7227891156462585 [2024-02-05 10:26:50,090 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 218 flow. Second operand 4 states and 425 transitions. [2024-02-05 10:26:50,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 390 flow [2024-02-05 10:26:50,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:50,092 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 215 flow [2024-02-05 10:26:50,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-02-05 10:26:50,093 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-02-05 10:26:50,093 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 215 flow [2024-02-05 10:26:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:50,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:50,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:26:50,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-05 10:26:50,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash -978189464, now seen corresponding path program 1 times [2024-02-05 10:26:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471201675] [2024-02-05 10:26:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:50,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:50,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471201675] [2024-02-05 10:26:50,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471201675] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:50,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:50,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864460323] [2024-02-05 10:26:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:50,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:50,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 147 [2024-02-05 10:26:50,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:50,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:50,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 147 [2024-02-05 10:26:50,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:27:04,522 INFO L124 PetriNetUnfolderBase]: 82103/141314 cut-off events. [2024-02-05 10:27:04,523 INFO L125 PetriNetUnfolderBase]: For 11672/11672 co-relation queries the response was YES. [2024-02-05 10:27:04,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261438 conditions, 141314 events. 82103/141314 cut-off events. For 11672/11672 co-relation queries the response was YES. Maximal size of possible extension queue 4833. Compared 1431837 event pairs, 32226 based on Foata normal form. 0/128106 useless extension candidates. Maximal degree in co-relation 261422. Up to 104058 conditions per place. [2024-02-05 10:27:05,667 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 64 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-02-05 10:27:05,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 445 flow [2024-02-05 10:27:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:27:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:27:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2024-02-05 10:27:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-02-05 10:27:05,669 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 215 flow. Second operand 4 states and 386 transitions. [2024-02-05 10:27:05,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 445 flow [2024-02-05 10:27:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 115 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:27:05,852 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 257 flow [2024-02-05 10:27:05,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2024-02-05 10:27:05,853 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-02-05 10:27:05,853 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 257 flow [2024-02-05 10:27:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:27:05,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:27:05,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:27:05,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:27:05,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-05 10:27:05,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:27:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash 6391861, now seen corresponding path program 1 times [2024-02-05 10:27:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:27:05,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736409591] [2024-02-05 10:27:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:27:05,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:27:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:27:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:27:05,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:27:05,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736409591] [2024-02-05 10:27:05,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736409591] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:27:05,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:27:05,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:27:05,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153273506] [2024-02-05 10:27:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:27:05,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:27:05,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:27:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:27:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:27:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-02-05 10:27:05,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:27:05,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:27:05,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-02-05 10:27:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand