./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3d25acf6 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-3d25acf-m [2024-01-30 14:16:28,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-30 14:16:28,971 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-30 14:16:28,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-30 14:16:28,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-30 14:16:28,995 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-30 14:16:28,995 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-30 14:16:28,996 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-30 14:16:28,996 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-30 14:16:28,996 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-30 14:16:28,997 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-30 14:16:28,997 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-30 14:16:28,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-30 14:16:28,998 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-30 14:16:28,998 INFO L153 SettingsManager]: * Use SBE=true [2024-01-30 14:16:28,998 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-30 14:16:28,999 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-30 14:16:28,999 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-30 14:16:28,999 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-30 14:16:28,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-30 14:16:28,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-30 14:16:29,004 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-30 14:16:29,005 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-30 14:16:29,005 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-30 14:16:29,005 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-30 14:16:29,005 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-30 14:16:29,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-30 14:16:29,006 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-30 14:16:29,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-30 14:16:29,006 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-30 14:16:29,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-30 14:16:29,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-30 14:16:29,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:16:29,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-30 14:16:29,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-30 14:16:29,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-30 14:16:29,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-30 14:16:29,008 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-30 14:16:29,009 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-30 14:16:29,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-30 14:16:29,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-30 14:16:29,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-30 14:16:29,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-30 14:16:29,201 INFO L274 PluginConnector]: CDTParser initialized [2024-01-30 14:16:29,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-30 14:16:30,288 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-30 14:16:30,543 INFO L384 CDTParser]: Found 1 translation units. [2024-01-30 14:16:30,544 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-30 14:16:30,557 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49de751f6/0ed0ff5e2dc548aebf1c2f21f7d563f1/FLAGd8b7c20b2 [2024-01-30 14:16:30,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49de751f6/0ed0ff5e2dc548aebf1c2f21f7d563f1 [2024-01-30 14:16:30,569 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-30 14:16:30,570 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-30 14:16:30,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml [2024-01-30 14:16:30,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-30 14:16:30,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-30 14:16:30,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-30 14:16:30,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-30 14:16:30,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-30 14:16:30,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:16:30" (1/2) ... [2024-01-30 14:16:30,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a88132a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:16:30, skipping insertion in model container [2024-01-30 14:16:30,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:16:30" (1/2) ... [2024-01-30 14:16:30,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3433c06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:16:30, skipping insertion in model container [2024-01-30 14:16:30,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:16:30" (2/2) ... [2024-01-30 14:16:30,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a88132a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:30, skipping insertion in model container [2024-01-30 14:16:30,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:16:30" (2/2) ... [2024-01-30 14:16:30,708 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-30 14:16:30,811 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-30 14:16:30,813 INFO L98 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) [2024-01-30 14:16:30,813 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] (((((((((((((((((((((((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3)) && (0 <= a)) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-30 14:16:30,813 INFO L98 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) [2024-01-30 14:16:30,813 INFO L98 nessWitnessExtractor]: Loop invariant at [L704-L709] (unsigned long )arg == 0UL [2024-01-30 14:16:30,813 INFO L98 nessWitnessExtractor]: Loop invariant at [L693-L693] (unsigned long )arg == 0UL [2024-01-30 14:16:30,814 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-01-30 14:16:30,814 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] (((((((((((((((((((((((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3)) && (0 <= a)) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-30 14:16:30,814 INFO L98 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) [2024-01-30 14:16:30,814 INFO L98 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-01-30 14:16:30,814 INFO L98 nessWitnessExtractor]: Location invariant before [L714-L714] (((a == 1) && (b == 2)) && (c == 3)) && (temp == 0) [2024-01-30 14:16:30,815 INFO L98 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) [2024-01-30 14:16:30,815 INFO L98 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) [2024-01-30 14:16:30,815 INFO L98 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) [2024-01-30 14:16:30,856 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-30 14:16:31,071 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] [2024-01-30 14:16:31,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:16:31,083 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-30 14:16:31,158 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] Start Parsing Local [2024-01-30 14:16:31,164 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-30 14:16:31,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:16:31,194 INFO L206 MainTranslator]: Completed translation [2024-01-30 14:16:31,195 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31 WrapperNode [2024-01-30 14:16:31,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-30 14:16:31,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-30 14:16:31,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-30 14:16:31,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-30 14:16:31,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,228 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-01-30 14:16:31,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-30 14:16:31,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-30 14:16:31,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-30 14:16:31,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-30 14:16:31,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,241 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,252 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]. [2024-01-30 14:16:31,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,260 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,270 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-30 14:16:31,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-30 14:16:31,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-30 14:16:31,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-30 14:16:31,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (1/1) ... [2024-01-30 14:16:31,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:16:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:16:31,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-30 14:16:31,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-30 14:16:31,331 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-01-30 14:16:31,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-01-30 14:16:31,331 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-30 14:16:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-30 14:16:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-30 14:16:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-30 14:16:31,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-30 14:16:31,334 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-30 14:16:31,424 INFO L244 CfgBuilder]: Building ICFG [2024-01-30 14:16:31,426 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-30 14:16:31,689 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-30 14:16:31,690 INFO L293 CfgBuilder]: Performing block encoding [2024-01-30 14:16:31,803 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-30 14:16:31,804 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-30 14:16:31,805 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:16:31 BoogieIcfgContainer [2024-01-30 14:16:31,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-30 14:16:31,808 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-30 14:16:31,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-30 14:16:31,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-30 14:16:31,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 02:16:30" (1/4) ... [2024-01-30 14:16:31,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eaac52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 02:16:31, skipping insertion in model container [2024-01-30 14:16:31,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:16:30" (2/4) ... [2024-01-30 14:16:31,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eaac52c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:16:31, skipping insertion in model container [2024-01-30 14:16:31,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:16:31" (3/4) ... [2024-01-30 14:16:31,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eaac52c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:16:31, skipping insertion in model container [2024-01-30 14:16:31,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:16:31" (4/4) ... [2024-01-30 14:16:31,814 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-01-30 14:16:31,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-30 14:16:31,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-01-30 14:16:31,826 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-30 14:16:31,886 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:16:31,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 53 transitions, 114 flow [2024-01-30 14:16:31,949 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2024-01-30 14:16:31,949 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:16:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 54 events. 3/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 111 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2024-01-30 14:16:31,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 53 transitions, 114 flow [2024-01-30 14:16:31,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 111 flow [2024-01-30 14:16:31,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:16:31,974 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;@5d97504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:16:31,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-30 14:16:31,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:16:31,976 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-30 14:16:31,976 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:16:31,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:31,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-30 14:16:31,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-30 14:16:31,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 7861, now seen corresponding path program 1 times [2024-01-30 14:16:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:31,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247084480] [2024-01-30 14:16:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:31,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247084480] [2024-01-30 14:16:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247084480] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:32,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-30 14:16:32,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436227363] [2024-01-30 14:16:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:16:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:16:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:16:32,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 53 [2024-01-30 14:16:32,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:32,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:32,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 53 [2024-01-30 14:16:32,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:32,381 INFO L124 PetriNetUnfolderBase]: 151/437 cut-off events. [2024-01-30 14:16:32,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:16:32,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 437 events. 151/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2494 event pairs, 40 based on Foata normal form. 78/467 useless extension candidates. Maximal degree in co-relation 700. Up to 213 conditions per place. [2024-01-30 14:16:32,388 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-01-30 14:16:32,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 159 flow [2024-01-30 14:16:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:16:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:16:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-01-30 14:16:32,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7861635220125787 [2024-01-30 14:16:32,399 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 111 flow. Second operand 3 states and 125 transitions. [2024-01-30 14:16:32,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 159 flow [2024-01-30 14:16:32,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:32,407 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 112 flow [2024-01-30 14:16:32,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-30 14:16:32,412 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2024-01-30 14:16:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 112 flow [2024-01-30 14:16:32,412 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) [2024-01-30 14:16:32,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:32,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:16:32,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-30 14:16:32,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-30 14:16:32,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash 234499080, now seen corresponding path program 1 times [2024-01-30 14:16:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288418084] [2024-01-30 14:16:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288418084] [2024-01-30 14:16:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288418084] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:32,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:32,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337779053] [2024-01-30 14:16:32,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:32,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:32,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 53 [2024-01-30 14:16:32,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:32,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:32,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 53 [2024-01-30 14:16:32,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:32,691 INFO L124 PetriNetUnfolderBase]: 176/640 cut-off events. [2024-01-30 14:16:32,691 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-30 14:16:32,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 640 events. 176/640 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3939 event pairs, 14 based on Foata normal form. 81/651 useless extension candidates. Maximal degree in co-relation 958. Up to 213 conditions per place. [2024-01-30 14:16:32,698 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 26 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-01-30 14:16:32,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 192 flow [2024-01-30 14:16:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-01-30 14:16:32,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028301886792453 [2024-01-30 14:16:32,710 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 112 flow. Second operand 4 states and 149 transitions. [2024-01-30 14:16:32,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 192 flow [2024-01-30 14:16:32,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:32,712 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 108 flow [2024-01-30 14:16:32,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-01-30 14:16:32,713 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2024-01-30 14:16:32,713 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 108 flow [2024-01-30 14:16:32,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:32,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:32,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:32,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-30 14:16:32,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-30 14:16:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1627731790, now seen corresponding path program 1 times [2024-01-30 14:16:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:32,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626214765] [2024-01-30 14:16:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:32,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:16:32,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-30 14:16:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:16:32,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-30 14:16:32,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-30 14:16:32,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-01-30 14:16:32,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-01-30 14:16:32,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-01-30 14:16:32,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-01-30 14:16:32,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-01-30 14:16:32,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-01-30 14:16:32,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-01-30 14:16:32,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-01-30 14:16:32,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-01-30 14:16:32,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-01-30 14:16:32,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-01-30 14:16:32,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (17 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-01-30 14:16:32,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-01-30 14:16:32,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-01-30 14:16:32,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-01-30 14:16:32,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-01-30 14:16:32,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-01-30 14:16:32,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-01-30 14:16:32,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-01-30 14:16:32,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-01-30 14:16:32,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (2 of 29 remaining) [2024-01-30 14:16:32,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-01-30 14:16:32,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-01-30 14:16:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-30 14:16:32,783 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-30 14:16:32,785 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-30 14:16:32,785 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-30 14:16:32,844 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:16:32,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 97 transitions, 214 flow [2024-01-30 14:16:32,856 INFO L124 PetriNetUnfolderBase]: 4/79 cut-off events. [2024-01-30 14:16:32,856 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-30 14:16:32,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 79 events. 4/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 226 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 86. Up to 3 conditions per place. [2024-01-30 14:16:32,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 97 transitions, 214 flow [2024-01-30 14:16:32,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 74 transitions, 161 flow [2024-01-30 14:16:32,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:16:32,864 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;@5d97504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:16:32,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-01-30 14:16:32,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:16:32,865 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-30 14:16:32,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:16:32,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:32,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-30 14:16:32,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-30 14:16:32,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash 10965, now seen corresponding path program 1 times [2024-01-30 14:16:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:32,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467631840] [2024-01-30 14:16:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:32,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467631840] [2024-01-30 14:16:32,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467631840] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:32,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:32,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-30 14:16:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207397671] [2024-01-30 14:16:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:32,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:16:32,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:16:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:16:32,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 97 [2024-01-30 14:16:32,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:32,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:32,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 97 [2024-01-30 14:16:32,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:33,445 INFO L124 PetriNetUnfolderBase]: 2096/4470 cut-off events. [2024-01-30 14:16:33,446 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-01-30 14:16:33,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7585 conditions, 4470 events. 2096/4470 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 36493 event pairs, 631 based on Foata normal form. 870/4992 useless extension candidates. Maximal degree in co-relation 7572. Up to 2860 conditions per place. [2024-01-30 14:16:33,477 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 31 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-01-30 14:16:33,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 240 flow [2024-01-30 14:16:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:16:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:16:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-30 14:16:33,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7731958762886598 [2024-01-30 14:16:33,480 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 161 flow. Second operand 3 states and 225 transitions. [2024-01-30 14:16:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 240 flow [2024-01-30 14:16:33,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:33,482 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 167 flow [2024-01-30 14:16:33,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-01-30 14:16:33,484 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-01-30 14:16:33,485 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 167 flow [2024-01-30 14:16:33,485 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) [2024-01-30 14:16:33,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:33,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:16:33,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-30 14:16:33,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-30 14:16:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash 327108660, now seen corresponding path program 1 times [2024-01-30 14:16:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:33,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903681376] [2024-01-30 14:16:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903681376] [2024-01-30 14:16:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903681376] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060993447] [2024-01-30 14:16:33,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:33,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:33,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 97 [2024-01-30 14:16:33,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:33,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:33,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 97 [2024-01-30 14:16:33,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:34,096 INFO L124 PetriNetUnfolderBase]: 1910/4654 cut-off events. [2024-01-30 14:16:34,096 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-01-30 14:16:34,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4654 events. 1910/4654 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 39195 event pairs, 921 based on Foata normal form. 549/4626 useless extension candidates. Maximal degree in co-relation 7881. Up to 2267 conditions per place. [2024-01-30 14:16:34,134 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 42 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-01-30 14:16:34,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 305 flow [2024-01-30 14:16:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-01-30 14:16:34,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7396907216494846 [2024-01-30 14:16:34,136 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 167 flow. Second operand 4 states and 287 transitions. [2024-01-30 14:16:34,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 305 flow [2024-01-30 14:16:34,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:34,141 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 162 flow [2024-01-30 14:16:34,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-01-30 14:16:34,143 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2024-01-30 14:16:34,143 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 162 flow [2024-01-30 14:16:34,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:34,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:34,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-30 14:16:34,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-30 14:16:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1035871013, now seen corresponding path program 1 times [2024-01-30 14:16:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:34,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478721637] [2024-01-30 14:16:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:34,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478721637] [2024-01-30 14:16:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478721637] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362991072] [2024-01-30 14:16:34,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:34,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2024-01-30 14:16:34,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:34,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:34,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2024-01-30 14:16:34,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:34,613 INFO L124 PetriNetUnfolderBase]: 1822/4208 cut-off events. [2024-01-30 14:16:34,613 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-01-30 14:16:34,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7158 conditions, 4208 events. 1822/4208 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 34270 event pairs, 362 based on Foata normal form. 320/4168 useless extension candidates. Maximal degree in co-relation 7142. Up to 2307 conditions per place. [2024-01-30 14:16:34,634 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 38 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-01-30 14:16:34,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 277 flow [2024-01-30 14:16:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-01-30 14:16:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7396907216494846 [2024-01-30 14:16:34,636 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 162 flow. Second operand 4 states and 287 transitions. [2024-01-30 14:16:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 277 flow [2024-01-30 14:16:34,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:16:34,639 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 159 flow [2024-01-30 14:16:34,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-01-30 14:16:34,641 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-01-30 14:16:34,641 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 159 flow [2024-01-30 14:16:34,641 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) [2024-01-30 14:16:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:34,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:34,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-30 14:16:34,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-30 14:16:34,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1862631509, now seen corresponding path program 1 times [2024-01-30 14:16:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103414489] [2024-01-30 14:16:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103414489] [2024-01-30 14:16:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103414489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:34,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:34,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:16:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473468326] [2024-01-30 14:16:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:34,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 97 [2024-01-30 14:16:34,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:34,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:34,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 97 [2024-01-30 14:16:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:35,904 INFO L124 PetriNetUnfolderBase]: 6383/12452 cut-off events. [2024-01-30 14:16:35,904 INFO L125 PetriNetUnfolderBase]: For 1064/1064 co-relation queries the response was YES. [2024-01-30 14:16:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22751 conditions, 12452 events. 6383/12452 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 104729 event pairs, 1619 based on Foata normal form. 0/11369 useless extension candidates. Maximal degree in co-relation 22736. Up to 8437 conditions per place. [2024-01-30 14:16:35,985 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 51 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-01-30 14:16:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 337 flow [2024-01-30 14:16:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-01-30 14:16:35,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6572164948453608 [2024-01-30 14:16:35,987 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 159 flow. Second operand 4 states and 255 transitions. [2024-01-30 14:16:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 337 flow [2024-01-30 14:16:35,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:16:35,989 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 191 flow [2024-01-30 14:16:35,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-01-30 14:16:35,990 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-01-30 14:16:35,990 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 191 flow [2024-01-30 14:16:35,990 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) [2024-01-30 14:16:35,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:35,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-30 14:16:35,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-30 14:16:35,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2105944043, now seen corresponding path program 1 times [2024-01-30 14:16:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975428234] [2024-01-30 14:16:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:16:36,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-30 14:16:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:16:36,012 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-30 14:16:36,012 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 42 remaining) [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 42 remaining) [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 42 remaining) [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 42 remaining) [2024-01-30 14:16:36,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 42 remaining) [2024-01-30 14:16:36,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (30 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (26 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 42 remaining) [2024-01-30 14:16:36,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 42 remaining) [2024-01-30 14:16:36,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 42 remaining) [2024-01-30 14:16:36,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (8 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 42 remaining) [2024-01-30 14:16:36,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 42 remaining) [2024-01-30 14:16:36,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 42 remaining) [2024-01-30 14:16:36,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (2 of 42 remaining) [2024-01-30 14:16:36,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 42 remaining) [2024-01-30 14:16:36,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 42 remaining) [2024-01-30 14:16:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-30 14:16:36,019 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-01-30 14:16:36,020 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-30 14:16:36,020 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-30 14:16:36,090 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:16:36,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 141 transitions, 318 flow [2024-01-30 14:16:36,100 INFO L124 PetriNetUnfolderBase]: 5/104 cut-off events. [2024-01-30 14:16:36,100 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-30 14:16:36,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 104 events. 5/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 346 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2024-01-30 14:16:36,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 141 transitions, 318 flow [2024-01-30 14:16:36,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 96 transitions, 213 flow [2024-01-30 14:16:36,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:16:36,103 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;@5d97504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:16:36,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-01-30 14:16:36,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:16:36,104 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-30 14:16:36,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:16:36,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:36,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-30 14:16:36,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:16:36,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 15477, now seen corresponding path program 1 times [2024-01-30 14:16:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:36,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266789509] [2024-01-30 14:16:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:36,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266789509] [2024-01-30 14:16:36,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266789509] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:36,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:36,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-30 14:16:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707838813] [2024-01-30 14:16:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:16:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:16:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:16:36,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 141 [2024-01-30 14:16:36,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:36,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:36,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 141 [2024-01-30 14:16:36,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:39,954 INFO L124 PetriNetUnfolderBase]: 23551/42425 cut-off events. [2024-01-30 14:16:39,955 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2024-01-30 14:16:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74256 conditions, 42425 events. 23551/42425 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 409920 event pairs, 9184 based on Foata normal form. 8648/48324 useless extension candidates. Maximal degree in co-relation 74242. Up to 30303 conditions per place. [2024-01-30 14:16:40,469 INFO L140 encePairwiseOnDemand]: 129/141 looper letters, 41 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2024-01-30 14:16:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 325 flow [2024-01-30 14:16:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:16:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:16:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2024-01-30 14:16:40,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7683215130023641 [2024-01-30 14:16:40,471 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 213 flow. Second operand 3 states and 325 transitions. [2024-01-30 14:16:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 325 flow [2024-01-30 14:16:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:40,476 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 222 flow [2024-01-30 14:16:40,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-01-30 14:16:40,477 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -4 predicate places. [2024-01-30 14:16:40,478 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 222 flow [2024-01-30 14:16:40,478 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) [2024-01-30 14:16:40,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:40,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:16:40,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-30 14:16:40,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:16:40,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 461708332, now seen corresponding path program 1 times [2024-01-30 14:16:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:40,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515960548] [2024-01-30 14:16:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:40,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515960548] [2024-01-30 14:16:40,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515960548] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:40,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:40,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:40,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316701163] [2024-01-30 14:16:40,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:40,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:40,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:40,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 141 [2024-01-30 14:16:40,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:40,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:40,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 141 [2024-01-30 14:16:40,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:44,168 INFO L124 PetriNetUnfolderBase]: 17945/40459 cut-off events. [2024-01-30 14:16:44,168 INFO L125 PetriNetUnfolderBase]: For 3407/3407 co-relation queries the response was YES. [2024-01-30 14:16:44,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66863 conditions, 40459 events. 17945/40459 cut-off events. For 3407/3407 co-relation queries the response was YES. Maximal size of possible extension queue 1548. Compared 461575 event pairs, 2438 based on Foata normal form. 3699/40371 useless extension candidates. Maximal degree in co-relation 66847. Up to 17274 conditions per place. [2024-01-30 14:16:44,635 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 58 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-01-30 14:16:44,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 116 transitions, 418 flow [2024-01-30 14:16:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-01-30 14:16:44,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7535460992907801 [2024-01-30 14:16:44,637 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 222 flow. Second operand 4 states and 425 transitions. [2024-01-30 14:16:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 116 transitions, 418 flow [2024-01-30 14:16:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:16:44,640 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 216 flow [2024-01-30 14:16:44,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2024-01-30 14:16:44,640 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -5 predicate places. [2024-01-30 14:16:44,641 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 216 flow [2024-01-30 14:16:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:44,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:44,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-30 14:16:44,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:16:44,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1591308044, now seen corresponding path program 1 times [2024-01-30 14:16:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:44,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555851348] [2024-01-30 14:16:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:44,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555851348] [2024-01-30 14:16:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555851348] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:44,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:44,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449472480] [2024-01-30 14:16:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:44,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 141 [2024-01-30 14:16:44,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:44,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:44,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 141 [2024-01-30 14:16:44,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:47,490 INFO L124 PetriNetUnfolderBase]: 18323/36010 cut-off events. [2024-01-30 14:16:47,490 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2024-01-30 14:16:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63258 conditions, 36010 events. 18323/36010 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 366813 event pairs, 5319 based on Foata normal form. 2476/35218 useless extension candidates. Maximal degree in co-relation 63241. Up to 21204 conditions per place. [2024-01-30 14:16:47,830 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 54 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-01-30 14:16:47,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 110 transitions, 388 flow [2024-01-30 14:16:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-01-30 14:16:47,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7535460992907801 [2024-01-30 14:16:47,831 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 216 flow. Second operand 4 states and 425 transitions. [2024-01-30 14:16:47,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 110 transitions, 388 flow [2024-01-30 14:16:47,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:16:47,834 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 213 flow [2024-01-30 14:16:47,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-01-30 14:16:47,834 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -6 predicate places. [2024-01-30 14:16:47,834 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 213 flow [2024-01-30 14:16:47,835 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) [2024-01-30 14:16:47,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:47,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-30 14:16:47,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:16:47,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2076497494, now seen corresponding path program 1 times [2024-01-30 14:16:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636699599] [2024-01-30 14:16:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636699599] [2024-01-30 14:16:47,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636699599] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:47,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:47,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:16:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452008448] [2024-01-30 14:16:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:48,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 141 [2024-01-30 14:16:48,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:48,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:48,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 141 [2024-01-30 14:16:48,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:58,079 INFO L124 PetriNetUnfolderBase]: 69643/120469 cut-off events. [2024-01-30 14:16:58,080 INFO L125 PetriNetUnfolderBase]: For 10106/10106 co-relation queries the response was YES. [2024-01-30 14:16:58,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222973 conditions, 120469 events. 69643/120469 cut-off events. For 10106/10106 co-relation queries the response was YES. Maximal size of possible extension queue 4133. Compared 1205512 event pairs, 25206 based on Foata normal form. 0/110150 useless extension candidates. Maximal degree in co-relation 222957. Up to 88112 conditions per place. [2024-01-30 14:16:58,965 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 63 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-01-30 14:16:58,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 441 flow [2024-01-30 14:16:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 385 transitions. [2024-01-30 14:16:58,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826241134751773 [2024-01-30 14:16:58,970 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 213 flow. Second operand 4 states and 385 transitions. [2024-01-30 14:16:58,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 441 flow [2024-01-30 14:16:58,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 114 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:16:58,974 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 255 flow [2024-01-30 14:16:58,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2024-01-30 14:16:58,975 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -3 predicate places. [2024-01-30 14:16:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 255 flow [2024-01-30 14:16:58,975 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) [2024-01-30 14:16:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-30 14:16:58,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:16:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash -81935683, now seen corresponding path program 1 times [2024-01-30 14:16:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085526830] [2024-01-30 14:16:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:16:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:59,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085526830] [2024-01-30 14:16:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085526830] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:59,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158729883] [2024-01-30 14:16:59,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:59,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:59,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 141 [2024-01-30 14:16:59,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:59,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:59,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 141 [2024-01-30 14:16:59,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:17:03,004 INFO L124 PetriNetUnfolderBase]: 20254/41179 cut-off events. [2024-01-30 14:17:03,004 INFO L125 PetriNetUnfolderBase]: For 4900/4900 co-relation queries the response was YES. [2024-01-30 14:17:03,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73046 conditions, 41179 events. 20254/41179 cut-off events. For 4900/4900 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 439516 event pairs, 8318 based on Foata normal form. 1750/38768 useless extension candidates. Maximal degree in co-relation 73027. Up to 23932 conditions per place. [2024-01-30 14:17:03,308 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 67 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2024-01-30 14:17:03,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 122 transitions, 496 flow [2024-01-30 14:17:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:17:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:17:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2024-01-30 14:17:03,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7641843971631206 [2024-01-30 14:17:03,313 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 255 flow. Second operand 4 states and 431 transitions. [2024-01-30 14:17:03,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 122 transitions, 496 flow [2024-01-30 14:17:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:17:03,315 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 241 flow [2024-01-30 14:17:03,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-01-30 14:17:03,316 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -4 predicate places. [2024-01-30 14:17:03,316 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 241 flow [2024-01-30 14:17:03,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:17:03,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:17:03,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:17:03,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-30 14:17:03,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-30 14:17:03,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:17:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1715573897, now seen corresponding path program 1 times [2024-01-30 14:17:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:17:03,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802201876] [2024-01-30 14:17:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:17:03,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:17:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:17:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:17:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:17:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802201876] [2024-01-30 14:17:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802201876] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:17:03,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:17:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:17:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706230019] [2024-01-30 14:17:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:17:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:17:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:17:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:17:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:17:03,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 141 [2024-01-30 14:17:03,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:17:03,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:17:03,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 141 [2024-01-30 14:17:03,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand