./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe022_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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-wmm/safe022_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe022_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:40:43,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:40:43,760 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:40:43,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:40:43,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:40:43,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:40:43,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:40:43,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:40:43,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:40:43,792 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:40:43,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:40:43,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:40:43,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:40:43,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:40:43,794 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:40:43,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:40:43,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:40:43,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:40:43,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:40:43,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:40:43,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:40:43,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:40:43,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:40:43,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:40:43,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:40:43,797 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:40:43,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:40:43,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:40:43,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:40:43,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:40:43,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:40:43,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:40:43,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:40:43,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:40:43,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:40:43,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:40:43,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:40:43,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:40:43,799 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:40:43,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:40:43,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:40:43,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:40:43,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:40:43,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:40:44,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:40:44,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:40:44,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:40:44,041 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:40:44,041 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:40:44,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-05-12 10:40:45,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:40:45,284 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:40:45,285 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-05-12 10:40:45,297 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09277904a/45e408f658264bf89eb42730981ba698/FLAG25d8a57a7 [2024-05-12 10:40:45,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09277904a/45e408f658264bf89eb42730981ba698 [2024-05-12 10:40:45,309 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:40:45,310 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:40:45,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe022_tso.yml/witness.yml [2024-05-12 10:40:45,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:40:45,395 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:40:45,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:40:45,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:40:45,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:40:45,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:40:45" (1/2) ... [2024-05-12 10:40:45,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406eb0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:40:45, skipping insertion in model container [2024-05-12 10:40:45,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:40:45" (1/2) ... [2024-05-12 10:40:45,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76db4a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:40:45, skipping insertion in model container [2024-05-12 10:40:45,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:45" (2/2) ... [2024-05-12 10:40:45,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406eb0ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45, skipping insertion in model container [2024-05-12 10:40:45,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:45" (2/2) ... [2024-05-12 10:40:45,405 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:40:45,430 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:40:45,431 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p1_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (2LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p1_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p1_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 10:40:45,431 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p1_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (2LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p1_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p1_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 10:40:45,431 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:40:45,432 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-05-12 10:40:45,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:40:45,614 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i[945,958] [2024-05-12 10:40:45,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:40:45,723 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:40:45,750 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:40:45,823 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:40:45,851 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:40:45,851 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45 WrapperNode [2024-05-12 10:40:45,851 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:40:45,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:40:45,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:40:45,852 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:40:45,857 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 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,867 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 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,887 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-05-12 10:40:45,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:40:45,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:40:45,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:40:45,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:40:45,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,900 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,910 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 10:40:45,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:40:45,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:40:45,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:40:45,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:40:45,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (1/1) ... [2024-05-12 10:40:45,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:40:45,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:40:45,955 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) [2024-05-12 10:40:45,970 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 [2024-05-12 10:40:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:40:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:40:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:40:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:40:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:40:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:40:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:40:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:40:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:40:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:40:45,989 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:40:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:40:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:40:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:40:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:40:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:40:45,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:40:45,993 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:40:46,096 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:40:46,098 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:40:46,327 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:40:46,327 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:40:46,414 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:40:46,414 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:40:46,415 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:40:46 BoogieIcfgContainer [2024-05-12 10:40:46,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:40:46,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:40:46,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:40:46,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:40:46,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:40:45" (1/4) ... [2024-05-12 10:40:46,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bc2f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:40:46, skipping insertion in model container [2024-05-12 10:40:46,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:45" (2/4) ... [2024-05-12 10:40:46,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bc2f3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:40:46, skipping insertion in model container [2024-05-12 10:40:46,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:45" (3/4) ... [2024-05-12 10:40:46,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bc2f3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:40:46, skipping insertion in model container [2024-05-12 10:40:46,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:40:46" (4/4) ... [2024-05-12 10:40:46,424 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-05-12 10:40:46,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:40:46,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 10:40:46,437 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:40:46,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:40:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 10:40:46,571 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2024-05-12 10:40:46,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:40:46,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 1/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-05-12 10:40:46,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 10:40:46,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 30 transitions, 66 flow [2024-05-12 10:40:46,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:40:46,588 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;@7f1ba236, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:40:46,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 10:40:46,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:40:46,592 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:40:46,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:40:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:46,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:40:46,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:46,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1392223833, now seen corresponding path program 1 times [2024-05-12 10:40:46,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:46,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352707] [2024-05-12 10:40:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:47,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352707] [2024-05-12 10:40:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352707] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:47,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:47,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:40:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401088988] [2024-05-12 10:40:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:40:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:40:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:40:47,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2024-05-12 10:40:47,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-05-12 10:40:47,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:47,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2024-05-12 10:40:47,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:47,402 INFO L124 PetriNetUnfolderBase]: 109/249 cut-off events. [2024-05-12 10:40:47,402 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 10:40:47,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 249 events. 109/249 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1108 event pairs, 69 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 456. Up to 196 conditions per place. [2024-05-12 10:40:47,407 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 23 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-05-12 10:40:47,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 137 flow [2024-05-12 10:40:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:40:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:40:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-05-12 10:40:47,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-05-12 10:40:47,418 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 66 flow. Second operand 3 states and 73 transitions. [2024-05-12 10:40:47,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 137 flow [2024-05-12 10:40:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:47,423 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 85 flow [2024-05-12 10:40:47,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-05-12 10:40:47,427 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-05-12 10:40:47,427 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 85 flow [2024-05-12 10:40:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-05-12 10:40:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:40:47,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:47,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2102685512, now seen corresponding path program 1 times [2024-05-12 10:40:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710934375] [2024-05-12 10:40:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:47,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710934375] [2024-05-12 10:40:47,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710934375] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:47,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:47,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:40:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577746908] [2024-05-12 10:40:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:47,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:40:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:40:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:40:47,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-05-12 10:40:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-05-12 10:40:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-05-12 10:40:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:47,878 INFO L124 PetriNetUnfolderBase]: 144/322 cut-off events. [2024-05-12 10:40:47,879 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-05-12 10:40:47,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 322 events. 144/322 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1444 event pairs, 59 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 666. Up to 240 conditions per place. [2024-05-12 10:40:47,881 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 32 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-05-12 10:40:47,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 198 flow [2024-05-12 10:40:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-05-12 10:40:47,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-05-12 10:40:47,883 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 85 flow. Second operand 4 states and 93 transitions. [2024-05-12 10:40:47,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 198 flow [2024-05-12 10:40:47,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:40:47,885 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 118 flow [2024-05-12 10:40:47,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-05-12 10:40:47,885 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-05-12 10:40:47,885 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 118 flow [2024-05-12 10:40:47,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-05-12 10:40:47,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:40:47,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:47,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash -758741142, now seen corresponding path program 1 times [2024-05-12 10:40:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149334324] [2024-05-12 10:40:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:48,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149334324] [2024-05-12 10:40:48,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149334324] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:48,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:48,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721672] [2024-05-12 10:40:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:48,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:40:48,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:40:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:40:48,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:48,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-05-12 10:40:48,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:48,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:48,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:48,250 INFO L124 PetriNetUnfolderBase]: 177/382 cut-off events. [2024-05-12 10:40:48,251 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-05-12 10:40:48,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 382 events. 177/382 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1763 event pairs, 51 based on Foata normal form. 2/383 useless extension candidates. Maximal degree in co-relation 885. Up to 281 conditions per place. [2024-05-12 10:40:48,257 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 43 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-05-12 10:40:48,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 281 flow [2024-05-12 10:40:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-05-12 10:40:48,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-05-12 10:40:48,263 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 118 flow. Second operand 5 states and 111 transitions. [2024-05-12 10:40:48,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 281 flow [2024-05-12 10:40:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 281 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:48,266 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-05-12 10:40:48,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-05-12 10:40:48,268 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-05-12 10:40:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-05-12 10:40:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-05-12 10:40:48,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:48,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:40:48,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:48,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:48,270 INFO L85 PathProgramCache]: Analyzing trace with hash -726509129, now seen corresponding path program 1 times [2024-05-12 10:40:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:48,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834467938] [2024-05-12 10:40:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:48,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:48,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:48,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834467938] [2024-05-12 10:40:48,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834467938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:48,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:48,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517486441] [2024-05-12 10:40:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:48,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:48,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 10:40:48,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:48,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:48,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:48,706 INFO L124 PetriNetUnfolderBase]: 173/351 cut-off events. [2024-05-12 10:40:48,706 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-05-12 10:40:48,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 351 events. 173/351 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1607 event pairs, 18 based on Foata normal form. 4/353 useless extension candidates. Maximal degree in co-relation 957. Up to 247 conditions per place. [2024-05-12 10:40:48,709 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 45 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-05-12 10:40:48,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 322 flow [2024-05-12 10:40:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-05-12 10:40:48,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-05-12 10:40:48,711 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 127 transitions. [2024-05-12 10:40:48,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 322 flow [2024-05-12 10:40:48,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:48,715 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 186 flow [2024-05-12 10:40:48,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2024-05-12 10:40:48,724 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-05-12 10:40:48,724 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 186 flow [2024-05-12 10:40:48,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 10:40:48,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:48,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:48,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:40:48,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:48,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:48,725 INFO L85 PathProgramCache]: Analyzing trace with hash -660461345, now seen corresponding path program 1 times [2024-05-12 10:40:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180698870] [2024-05-12 10:40:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:48,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:49,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180698870] [2024-05-12 10:40:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180698870] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:49,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141420074] [2024-05-12 10:40:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:49,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:49,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:49,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:49,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:49,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:49,195 INFO L124 PetriNetUnfolderBase]: 180/370 cut-off events. [2024-05-12 10:40:49,195 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2024-05-12 10:40:49,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 370 events. 180/370 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1730 event pairs, 36 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1061. Up to 251 conditions per place. [2024-05-12 10:40:49,199 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 44 selfloop transitions, 13 changer transitions 0/67 dead transitions. [2024-05-12 10:40:49,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 374 flow [2024-05-12 10:40:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 10:40:49,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-05-12 10:40:49,203 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 186 flow. Second operand 6 states and 131 transitions. [2024-05-12 10:40:49,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 374 flow [2024-05-12 10:40:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:49,211 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 216 flow [2024-05-12 10:40:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-05-12 10:40:49,213 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2024-05-12 10:40:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 216 flow [2024-05-12 10:40:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:40:49,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:49,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 890752457, now seen corresponding path program 2 times [2024-05-12 10:40:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170285957] [2024-05-12 10:40:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170285957] [2024-05-12 10:40:49,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170285957] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:49,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:49,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:49,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314781077] [2024-05-12 10:40:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:49,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:49,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:49,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:49,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:49,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:49,659 INFO L124 PetriNetUnfolderBase]: 194/392 cut-off events. [2024-05-12 10:40:49,660 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2024-05-12 10:40:49,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 392 events. 194/392 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1903 event pairs, 34 based on Foata normal form. 1/392 useless extension candidates. Maximal degree in co-relation 1197. Up to 291 conditions per place. [2024-05-12 10:40:49,662 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 45 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-05-12 10:40:49,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 398 flow [2024-05-12 10:40:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-05-12 10:40:49,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:40:49,664 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 216 flow. Second operand 6 states and 126 transitions. [2024-05-12 10:40:49,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 398 flow [2024-05-12 10:40:49,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 370 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:49,666 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 249 flow [2024-05-12 10:40:49,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-05-12 10:40:49,667 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-05-12 10:40:49,667 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 249 flow [2024-05-12 10:40:49,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:49,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:49,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:49,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:40:49,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:49,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 890752643, now seen corresponding path program 1 times [2024-05-12 10:40:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:49,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059886251] [2024-05-12 10:40:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059886251] [2024-05-12 10:40:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059886251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:49,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286341690] [2024-05-12 10:40:49,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:49,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:50,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:50,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:50,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:50,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:50,096 INFO L124 PetriNetUnfolderBase]: 201/440 cut-off events. [2024-05-12 10:40:50,096 INFO L125 PetriNetUnfolderBase]: For 776/776 co-relation queries the response was YES. [2024-05-12 10:40:50,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 440 events. 201/440 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2192 event pairs, 53 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 1284. Up to 283 conditions per place. [2024-05-12 10:40:50,099 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 48 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-05-12 10:40:50,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 443 flow [2024-05-12 10:40:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-05-12 10:40:50,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-05-12 10:40:50,100 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 249 flow. Second operand 6 states and 129 transitions. [2024-05-12 10:40:50,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 443 flow [2024-05-12 10:40:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 420 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:50,103 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 279 flow [2024-05-12 10:40:50,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-05-12 10:40:50,104 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-05-12 10:40:50,104 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 279 flow [2024-05-12 10:40:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:50,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:40:50,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:50,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash 287964001, now seen corresponding path program 2 times [2024-05-12 10:40:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055156661] [2024-05-12 10:40:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:50,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055156661] [2024-05-12 10:40:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055156661] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534112193] [2024-05-12 10:40:50,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:50,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:50,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:50,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:50,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:50,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:50,521 INFO L124 PetriNetUnfolderBase]: 208/430 cut-off events. [2024-05-12 10:40:50,521 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2024-05-12 10:40:50,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389 conditions, 430 events. 208/430 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2163 event pairs, 38 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 1361. Up to 291 conditions per place. [2024-05-12 10:40:50,525 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 45 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-05-12 10:40:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 463 flow [2024-05-12 10:40:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-05-12 10:40:50,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-05-12 10:40:50,526 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 279 flow. Second operand 5 states and 111 transitions. [2024-05-12 10:40:50,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 463 flow [2024-05-12 10:40:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 451 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:50,530 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 319 flow [2024-05-12 10:40:50,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-05-12 10:40:50,531 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2024-05-12 10:40:50,531 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 319 flow [2024-05-12 10:40:50,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:40:50,532 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:50,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash 288201151, now seen corresponding path program 3 times [2024-05-12 10:40:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098264365] [2024-05-12 10:40:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:50,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:50,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098264365] [2024-05-12 10:40:50,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098264365] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:50,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:50,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:50,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301837840] [2024-05-12 10:40:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:50,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:50,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:50,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:50,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:50,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:50,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:50,911 INFO L124 PetriNetUnfolderBase]: 206/415 cut-off events. [2024-05-12 10:40:50,911 INFO L125 PetriNetUnfolderBase]: For 1016/1016 co-relation queries the response was YES. [2024-05-12 10:40:50,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 415 events. 206/415 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2039 event pairs, 36 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 1418. Up to 303 conditions per place. [2024-05-12 10:40:50,914 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 45 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-05-12 10:40:50,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 461 flow [2024-05-12 10:40:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-05-12 10:40:50,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 10:40:50,915 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 319 flow. Second operand 4 states and 92 transitions. [2024-05-12 10:40:50,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 461 flow [2024-05-12 10:40:50,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 434 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:50,918 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 328 flow [2024-05-12 10:40:50,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-05-12 10:40:50,918 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-05-12 10:40:50,918 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 328 flow [2024-05-12 10:40:50,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:50,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:50,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:40:50,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:50,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash 287963815, now seen corresponding path program 3 times [2024-05-12 10:40:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727015657] [2024-05-12 10:40:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727015657] [2024-05-12 10:40:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727015657] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227843252] [2024-05-12 10:40:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:51,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:51,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:51,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:51,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:51,307 INFO L124 PetriNetUnfolderBase]: 204/412 cut-off events. [2024-05-12 10:40:51,308 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-05-12 10:40:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 412 events. 204/412 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2012 event pairs, 33 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 1417. Up to 287 conditions per place. [2024-05-12 10:40:51,310 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 48 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-05-12 10:40:51,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 496 flow [2024-05-12 10:40:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-05-12 10:40:51,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-05-12 10:40:51,311 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 328 flow. Second operand 5 states and 112 transitions. [2024-05-12 10:40:51,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 496 flow [2024-05-12 10:40:51,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:51,315 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 345 flow [2024-05-12 10:40:51,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-05-12 10:40:51,315 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-05-12 10:40:51,315 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 345 flow [2024-05-12 10:40:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:51,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:40:51,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash 288210079, now seen corresponding path program 1 times [2024-05-12 10:40:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:51,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010526606] [2024-05-12 10:40:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:51,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010526606] [2024-05-12 10:40:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010526606] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011615718] [2024-05-12 10:40:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:51,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:51,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:51,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:51,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:51,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:51,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:51,691 INFO L124 PetriNetUnfolderBase]: 201/405 cut-off events. [2024-05-12 10:40:51,691 INFO L125 PetriNetUnfolderBase]: For 1246/1246 co-relation queries the response was YES. [2024-05-12 10:40:51,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 405 events. 201/405 cut-off events. For 1246/1246 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1970 event pairs, 35 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 1442. Up to 315 conditions per place. [2024-05-12 10:40:51,695 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 49 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-05-12 10:40:51,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 477 flow [2024-05-12 10:40:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-05-12 10:40:51,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-05-12 10:40:51,696 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 345 flow. Second operand 4 states and 86 transitions. [2024-05-12 10:40:51,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 477 flow [2024-05-12 10:40:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 445 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:51,701 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 329 flow [2024-05-12 10:40:51,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=329, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-05-12 10:40:51,702 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-05-12 10:40:51,702 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 329 flow [2024-05-12 10:40:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 10:40:51,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:51,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:51,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:40:51,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:51,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1000535411, now seen corresponding path program 1 times [2024-05-12 10:40:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492756203] [2024-05-12 10:40:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:51,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:51,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492756203] [2024-05-12 10:40:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492756203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597154739] [2024-05-12 10:40:51,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:52,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:52,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:52,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:52,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,086 INFO L124 PetriNetUnfolderBase]: 208/420 cut-off events. [2024-05-12 10:40:52,087 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2024-05-12 10:40:52,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 420 events. 208/420 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2044 event pairs, 34 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1454. Up to 227 conditions per place. [2024-05-12 10:40:52,089 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 50 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-05-12 10:40:52,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 575 flow [2024-05-12 10:40:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-05-12 10:40:52,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2024-05-12 10:40:52,105 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 329 flow. Second operand 7 states and 152 transitions. [2024-05-12 10:40:52,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 575 flow [2024-05-12 10:40:52,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 563 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:52,109 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 398 flow [2024-05-12 10:40:52,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-05-12 10:40:52,109 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-05-12 10:40:52,109 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 398 flow [2024-05-12 10:40:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:52,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:52,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:40:52,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:52,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash 41972001, now seen corresponding path program 2 times [2024-05-12 10:40:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:52,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842039592] [2024-05-12 10:40:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:52,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842039592] [2024-05-12 10:40:52,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842039592] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:52,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:52,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:52,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963815207] [2024-05-12 10:40:52,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:52,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:52,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:52,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:52,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:52,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,504 INFO L124 PetriNetUnfolderBase]: 224/453 cut-off events. [2024-05-12 10:40:52,504 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2024-05-12 10:40:52,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1722 conditions, 453 events. 224/453 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2299 event pairs, 34 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 1689. Up to 295 conditions per place. [2024-05-12 10:40:52,507 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 54 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2024-05-12 10:40:52,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 648 flow [2024-05-12 10:40:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 10:40:52,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2024-05-12 10:40:52,509 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 398 flow. Second operand 7 states and 149 transitions. [2024-05-12 10:40:52,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 648 flow [2024-05-12 10:40:52,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 614 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:52,516 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 447 flow [2024-05-12 10:40:52,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-05-12 10:40:52,517 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2024-05-12 10:40:52,517 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 447 flow [2024-05-12 10:40:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:52,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:40:52,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:52,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1454630665, now seen corresponding path program 3 times [2024-05-12 10:40:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722771854] [2024-05-12 10:40:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722771854] [2024-05-12 10:40:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722771854] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:52,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:52,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:52,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892812620] [2024-05-12 10:40:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:52,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:52,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:52,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:52,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:52,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,926 INFO L124 PetriNetUnfolderBase]: 222/450 cut-off events. [2024-05-12 10:40:52,926 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2024-05-12 10:40:52,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 450 events. 222/450 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2284 event pairs, 34 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 1736. Up to 293 conditions per place. [2024-05-12 10:40:52,929 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 58 selfloop transitions, 22 changer transitions 0/90 dead transitions. [2024-05-12 10:40:52,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 665 flow [2024-05-12 10:40:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-05-12 10:40:52,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-05-12 10:40:52,931 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 447 flow. Second operand 9 states and 182 transitions. [2024-05-12 10:40:52,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 665 flow [2024-05-12 10:40:52,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 636 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:52,935 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 467 flow [2024-05-12 10:40:52,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-05-12 10:40:52,936 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2024-05-12 10:40:52,936 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 467 flow [2024-05-12 10:40:52,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:52,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:52,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:52,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:40:52,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:52,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 344301529, now seen corresponding path program 4 times [2024-05-12 10:40:52,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:52,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200379] [2024-05-12 10:40:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:52,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200379] [2024-05-12 10:40:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:53,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:53,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534426759] [2024-05-12 10:40:53,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:53,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:53,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:53,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:53,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 467 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:53,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:53,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:53,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:53,338 INFO L124 PetriNetUnfolderBase]: 229/477 cut-off events. [2024-05-12 10:40:53,338 INFO L125 PetriNetUnfolderBase]: For 2056/2056 co-relation queries the response was YES. [2024-05-12 10:40:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 477 events. 229/477 cut-off events. For 2056/2056 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2481 event pairs, 34 based on Foata normal form. 1/474 useless extension candidates. Maximal degree in co-relation 1874. Up to 319 conditions per place. [2024-05-12 10:40:53,341 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 56 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-05-12 10:40:53,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 673 flow [2024-05-12 10:40:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-05-12 10:40:53,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 10:40:53,343 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 467 flow. Second operand 5 states and 115 transitions. [2024-05-12 10:40:53,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 673 flow [2024-05-12 10:40:53,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 624 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:53,348 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 485 flow [2024-05-12 10:40:53,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-05-12 10:40:53,348 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-05-12 10:40:53,348 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 485 flow [2024-05-12 10:40:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:53,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:53,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:40:53,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:53,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 336944299, now seen corresponding path program 5 times [2024-05-12 10:40:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:53,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008165233] [2024-05-12 10:40:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:53,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:53,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:53,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008165233] [2024-05-12 10:40:53,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008165233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:53,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:53,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:53,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12488343] [2024-05-12 10:40:53,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:53,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:53,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:53,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:53,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:53,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:53,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:53,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:53,737 INFO L124 PetriNetUnfolderBase]: 236/498 cut-off events. [2024-05-12 10:40:53,737 INFO L125 PetriNetUnfolderBase]: For 2391/2391 co-relation queries the response was YES. [2024-05-12 10:40:53,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 498 events. 236/498 cut-off events. For 2391/2391 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2628 event pairs, 40 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1967. Up to 273 conditions per place. [2024-05-12 10:40:53,740 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 49 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2024-05-12 10:40:53,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 741 flow [2024-05-12 10:40:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 10:40:53,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-05-12 10:40:53,741 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 485 flow. Second operand 6 states and 134 transitions. [2024-05-12 10:40:53,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 741 flow [2024-05-12 10:40:53,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 89 transitions, 702 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:53,746 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 536 flow [2024-05-12 10:40:53,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=536, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2024-05-12 10:40:53,747 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-05-12 10:40:53,747 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 536 flow [2024-05-12 10:40:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:53,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:53,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:53,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:40:53,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:53,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash 336949879, now seen corresponding path program 6 times [2024-05-12 10:40:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:53,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239712339] [2024-05-12 10:40:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:53,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:53,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239712339] [2024-05-12 10:40:53,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239712339] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:53,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:53,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337401257] [2024-05-12 10:40:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:53,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:54,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 536 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:54,115 INFO L124 PetriNetUnfolderBase]: 234/477 cut-off events. [2024-05-12 10:40:54,116 INFO L125 PetriNetUnfolderBase]: For 2408/2408 co-relation queries the response was YES. [2024-05-12 10:40:54,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 477 events. 234/477 cut-off events. For 2408/2408 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2485 event pairs, 34 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1988. Up to 271 conditions per place. [2024-05-12 10:40:54,119 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2024-05-12 10:40:54,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 764 flow [2024-05-12 10:40:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-05-12 10:40:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-05-12 10:40:54,120 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 536 flow. Second operand 8 states and 169 transitions. [2024-05-12 10:40:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 764 flow [2024-05-12 10:40:54,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 94 transitions, 691 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:54,126 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 535 flow [2024-05-12 10:40:54,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=535, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2024-05-12 10:40:54,126 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2024-05-12 10:40:54,126 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 535 flow [2024-05-12 10:40:54,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:54,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:54,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:40:54,127 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:54,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1182979598, now seen corresponding path program 1 times [2024-05-12 10:40:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:54,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367258067] [2024-05-12 10:40:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:54,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:54,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367258067] [2024-05-12 10:40:54,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367258067] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:54,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:54,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:54,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349119822] [2024-05-12 10:40:54,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:54,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:54,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:54,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:54,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 535 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:54,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:54,525 INFO L124 PetriNetUnfolderBase]: 244/495 cut-off events. [2024-05-12 10:40:54,525 INFO L125 PetriNetUnfolderBase]: For 2445/2445 co-relation queries the response was YES. [2024-05-12 10:40:54,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 495 events. 244/495 cut-off events. For 2445/2445 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2630 event pairs, 10 based on Foata normal form. 2/496 useless extension candidates. Maximal degree in co-relation 2032. Up to 276 conditions per place. [2024-05-12 10:40:54,529 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 66 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-05-12 10:40:54,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 797 flow [2024-05-12 10:40:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-05-12 10:40:54,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-05-12 10:40:54,530 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 535 flow. Second operand 7 states and 148 transitions. [2024-05-12 10:40:54,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 797 flow [2024-05-12 10:40:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 95 transitions, 706 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:54,537 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 492 flow [2024-05-12 10:40:54,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-05-12 10:40:54,537 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 46 predicate places. [2024-05-12 10:40:54,538 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 492 flow [2024-05-12 10:40:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:54,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:40:54,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:54,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1183040048, now seen corresponding path program 2 times [2024-05-12 10:40:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248249238] [2024-05-12 10:40:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248249238] [2024-05-12 10:40:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248249238] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889946060] [2024-05-12 10:40:54,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:54,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:54,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:54,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:54,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:54,952 INFO L124 PetriNetUnfolderBase]: 254/513 cut-off events. [2024-05-12 10:40:54,952 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2024-05-12 10:40:54,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 513 events. 254/513 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2737 event pairs, 29 based on Foata normal form. 2/514 useless extension candidates. Maximal degree in co-relation 2011. Up to 349 conditions per place. [2024-05-12 10:40:54,955 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 66 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-05-12 10:40:54,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 722 flow [2024-05-12 10:40:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-05-12 10:40:54,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-05-12 10:40:54,956 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 492 flow. Second operand 7 states and 148 transitions. [2024-05-12 10:40:54,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 722 flow [2024-05-12 10:40:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 685 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:54,961 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 503 flow [2024-05-12 10:40:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=503, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2024-05-12 10:40:54,962 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2024-05-12 10:40:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 503 flow [2024-05-12 10:40:54,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:54,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:54,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:54,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:40:54,962 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:54,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1314634376, now seen corresponding path program 3 times [2024-05-12 10:40:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24396231] [2024-05-12 10:40:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24396231] [2024-05-12 10:40:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24396231] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:55,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:55,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:55,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455373733] [2024-05-12 10:40:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:55,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:55,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:55,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 503 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:55,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:55,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:55,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:55,368 INFO L124 PetriNetUnfolderBase]: 264/539 cut-off events. [2024-05-12 10:40:55,369 INFO L125 PetriNetUnfolderBase]: For 2553/2553 co-relation queries the response was YES. [2024-05-12 10:40:55,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111 conditions, 539 events. 264/539 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2918 event pairs, 29 based on Foata normal form. 2/537 useless extension candidates. Maximal degree in co-relation 2072. Up to 394 conditions per place. [2024-05-12 10:40:55,372 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 69 selfloop transitions, 13 changer transitions 0/92 dead transitions. [2024-05-12 10:40:55,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 720 flow [2024-05-12 10:40:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-05-12 10:40:55,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877551020408164 [2024-05-12 10:40:55,374 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 503 flow. Second operand 7 states and 144 transitions. [2024-05-12 10:40:55,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 720 flow [2024-05-12 10:40:55,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 92 transitions, 684 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:55,379 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 504 flow [2024-05-12 10:40:55,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2024-05-12 10:40:55,380 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 51 predicate places. [2024-05-12 10:40:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 504 flow [2024-05-12 10:40:55,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:55,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:55,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:55,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:40:55,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:55,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1314819074, now seen corresponding path program 1 times [2024-05-12 10:40:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592329763] [2024-05-12 10:40:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:55,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:55,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592329763] [2024-05-12 10:40:55,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592329763] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:55,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:55,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121811316] [2024-05-12 10:40:55,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:55,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:55,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:55,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:55,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:55,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:55,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:55,741 INFO L124 PetriNetUnfolderBase]: 274/549 cut-off events. [2024-05-12 10:40:55,741 INFO L125 PetriNetUnfolderBase]: For 2590/2590 co-relation queries the response was YES. [2024-05-12 10:40:55,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 549 events. 274/549 cut-off events. For 2590/2590 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2948 event pairs, 32 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 2117. Up to 391 conditions per place. [2024-05-12 10:40:55,744 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 66 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-05-12 10:40:55,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 93 transitions, 724 flow [2024-05-12 10:40:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 10:40:55,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-05-12 10:40:55,746 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 504 flow. Second operand 7 states and 146 transitions. [2024-05-12 10:40:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 93 transitions, 724 flow [2024-05-12 10:40:55,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 698 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:55,752 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 524 flow [2024-05-12 10:40:55,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2024-05-12 10:40:55,753 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 53 predicate places. [2024-05-12 10:40:55,753 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 524 flow [2024-05-12 10:40:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:55,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:55,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:55,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:40:55,753 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:55,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -724857092, now seen corresponding path program 4 times [2024-05-12 10:40:55,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:55,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190190952] [2024-05-12 10:40:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:56,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:56,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190190952] [2024-05-12 10:40:56,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190190952] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:56,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:56,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391741983] [2024-05-12 10:40:56,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:56,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:56,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:56,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:56,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:56,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:56,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:56,158 INFO L124 PetriNetUnfolderBase]: 271/555 cut-off events. [2024-05-12 10:40:56,158 INFO L125 PetriNetUnfolderBase]: For 2771/2771 co-relation queries the response was YES. [2024-05-12 10:40:56,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 555 events. 271/555 cut-off events. For 2771/2771 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3052 event pairs, 11 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 2122. Up to 347 conditions per place. [2024-05-12 10:40:56,162 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 65 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-05-12 10:40:56,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 740 flow [2024-05-12 10:40:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-05-12 10:40:56,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 10:40:56,163 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 524 flow. Second operand 6 states and 130 transitions. [2024-05-12 10:40:56,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 740 flow [2024-05-12 10:40:56,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 704 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:56,169 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 532 flow [2024-05-12 10:40:56,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=532, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2024-05-12 10:40:56,170 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2024-05-12 10:40:56,170 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 532 flow [2024-05-12 10:40:56,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:56,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:56,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:56,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:40:56,170 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:56,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2083420222, now seen corresponding path program 2 times [2024-05-12 10:40:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:56,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687521913] [2024-05-12 10:40:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:56,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687521913] [2024-05-12 10:40:56,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687521913] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:56,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:56,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912869225] [2024-05-12 10:40:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:56,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:56,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:56,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 532 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:56,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:56,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:56,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:56,589 INFO L124 PetriNetUnfolderBase]: 281/574 cut-off events. [2024-05-12 10:40:56,590 INFO L125 PetriNetUnfolderBase]: For 3174/3174 co-relation queries the response was YES. [2024-05-12 10:40:56,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 574 events. 281/574 cut-off events. For 3174/3174 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3161 event pairs, 33 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 2220. Up to 418 conditions per place. [2024-05-12 10:40:56,593 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 65 selfloop transitions, 13 changer transitions 0/88 dead transitions. [2024-05-12 10:40:56,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 732 flow [2024-05-12 10:40:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-05-12 10:40:56,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-05-12 10:40:56,594 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 532 flow. Second operand 5 states and 110 transitions. [2024-05-12 10:40:56,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 732 flow [2024-05-12 10:40:56,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 686 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:56,601 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 526 flow [2024-05-12 10:40:56,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=526, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2024-05-12 10:40:56,602 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 53 predicate places. [2024-05-12 10:40:56,602 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 526 flow [2024-05-12 10:40:56,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:56,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:56,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:40:56,603 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:56,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1855519072, now seen corresponding path program 3 times [2024-05-12 10:40:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099780382] [2024-05-12 10:40:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:56,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099780382] [2024-05-12 10:40:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099780382] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:56,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:56,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991627874] [2024-05-12 10:40:56,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:56,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:56,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:56,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:56,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:56,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:56,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:57,013 INFO L124 PetriNetUnfolderBase]: 291/580 cut-off events. [2024-05-12 10:40:57,014 INFO L125 PetriNetUnfolderBase]: For 2727/2727 co-relation queries the response was YES. [2024-05-12 10:40:57,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 580 events. 291/580 cut-off events. For 2727/2727 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3193 event pairs, 35 based on Foata normal form. 2/579 useless extension candidates. Maximal degree in co-relation 2233. Up to 408 conditions per place. [2024-05-12 10:40:57,017 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 64 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-05-12 10:40:57,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 742 flow [2024-05-12 10:40:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-05-12 10:40:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-05-12 10:40:57,018 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 526 flow. Second operand 6 states and 128 transitions. [2024-05-12 10:40:57,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 742 flow [2024-05-12 10:40:57,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 712 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:57,025 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 550 flow [2024-05-12 10:40:57,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-05-12 10:40:57,025 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 56 predicate places. [2024-05-12 10:40:57,025 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 550 flow [2024-05-12 10:40:57,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:57,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:57,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:40:57,026 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:57,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2091991102, now seen corresponding path program 4 times [2024-05-12 10:40:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:57,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502360979] [2024-05-12 10:40:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:57,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502360979] [2024-05-12 10:40:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502360979] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:57,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:57,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30029744] [2024-05-12 10:40:57,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:57,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:57,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:57,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 550 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:57,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:57,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:57,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:57,467 INFO L124 PetriNetUnfolderBase]: 288/587 cut-off events. [2024-05-12 10:40:57,467 INFO L125 PetriNetUnfolderBase]: For 2852/2852 co-relation queries the response was YES. [2024-05-12 10:40:57,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 587 events. 288/587 cut-off events. For 2852/2852 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3249 event pairs, 32 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 2229. Up to 399 conditions per place. [2024-05-12 10:40:57,471 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 68 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-05-12 10:40:57,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 760 flow [2024-05-12 10:40:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-05-12 10:40:57,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-05-12 10:40:57,472 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 550 flow. Second operand 6 states and 128 transitions. [2024-05-12 10:40:57,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 760 flow [2024-05-12 10:40:57,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 718 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:57,480 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 542 flow [2024-05-12 10:40:57,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-05-12 10:40:57,480 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2024-05-12 10:40:57,480 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 542 flow [2024-05-12 10:40:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:40:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:57,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:40:57,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:57,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 194139850, now seen corresponding path program 1 times [2024-05-12 10:40:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668730178] [2024-05-12 10:40:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:57,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668730178] [2024-05-12 10:40:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668730178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260213443] [2024-05-12 10:40:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:40:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:40:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:40:57,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 10:40:57,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 10:40:57,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:57,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 10:40:57,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:57,625 INFO L124 PetriNetUnfolderBase]: 148/434 cut-off events. [2024-05-12 10:40:57,626 INFO L125 PetriNetUnfolderBase]: For 1011/1015 co-relation queries the response was YES. [2024-05-12 10:40:57,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 434 events. 148/434 cut-off events. For 1011/1015 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2498 event pairs, 7 based on Foata normal form. 26/412 useless extension candidates. Maximal degree in co-relation 1248. Up to 151 conditions per place. [2024-05-12 10:40:57,630 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 22 changer transitions 1/82 dead transitions. [2024-05-12 10:40:57,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 660 flow [2024-05-12 10:40:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-05-12 10:40:57,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-05-12 10:40:57,631 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 542 flow. Second operand 4 states and 100 transitions. [2024-05-12 10:40:57,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 660 flow [2024-05-12 10:40:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 82 transitions, 610 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:57,636 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 582 flow [2024-05-12 10:40:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=582, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-05-12 10:40:57,637 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2024-05-12 10:40:57,637 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 582 flow [2024-05-12 10:40:57,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 10:40:57,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:57,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:40:57,638 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:57,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1953809460, now seen corresponding path program 1 times [2024-05-12 10:40:57,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:57,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115556883] [2024-05-12 10:40:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:57,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115556883] [2024-05-12 10:40:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115556883] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:57,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263645038] [2024-05-12 10:40:57,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:57,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:57,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:57,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 582 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:57,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:57,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:58,066 INFO L124 PetriNetUnfolderBase]: 263/608 cut-off events. [2024-05-12 10:40:58,066 INFO L125 PetriNetUnfolderBase]: For 4181/4181 co-relation queries the response was YES. [2024-05-12 10:40:58,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 608 events. 263/608 cut-off events. For 4181/4181 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3352 event pairs, 89 based on Foata normal form. 6/587 useless extension candidates. Maximal degree in co-relation 2126. Up to 190 conditions per place. [2024-05-12 10:40:58,069 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 60 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-05-12 10:40:58,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 888 flow [2024-05-12 10:40:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-05-12 10:40:58,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-05-12 10:40:58,070 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 582 flow. Second operand 8 states and 166 transitions. [2024-05-12 10:40:58,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 888 flow [2024-05-12 10:40:58,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 788 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:58,078 INFO L231 Difference]: Finished difference. Result has 98 places, 73 transitions, 565 flow [2024-05-12 10:40:58,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=98, PETRI_TRANSITIONS=73} [2024-05-12 10:40:58,078 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 61 predicate places. [2024-05-12 10:40:58,078 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 73 transitions, 565 flow [2024-05-12 10:40:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:58,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:40:58,079 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:58,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1474917782, now seen corresponding path program 2 times [2024-05-12 10:40:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:58,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883536845] [2024-05-12 10:40:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:58,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883536845] [2024-05-12 10:40:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883536845] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:58,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383345368] [2024-05-12 10:40:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:58,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:58,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 73 transitions, 565 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:58,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:58,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:58,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:58,497 INFO L124 PetriNetUnfolderBase]: 295/667 cut-off events. [2024-05-12 10:40:58,498 INFO L125 PetriNetUnfolderBase]: For 4325/4325 co-relation queries the response was YES. [2024-05-12 10:40:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 667 events. 295/667 cut-off events. For 4325/4325 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3884 event pairs, 143 based on Foata normal form. 8/641 useless extension candidates. Maximal degree in co-relation 2180. Up to 416 conditions per place. [2024-05-12 10:40:58,505 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2024-05-12 10:40:58,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 94 transitions, 789 flow [2024-05-12 10:40:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-05-12 10:40:58,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-05-12 10:40:58,506 INFO L175 Difference]: Start difference. First operand has 98 places, 73 transitions, 565 flow. Second operand 8 states and 161 transitions. [2024-05-12 10:40:58,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 94 transitions, 789 flow [2024-05-12 10:40:58,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 94 transitions, 726 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:58,514 INFO L231 Difference]: Finished difference. Result has 100 places, 73 transitions, 570 flow [2024-05-12 10:40:58,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=100, PETRI_TRANSITIONS=73} [2024-05-12 10:40:58,517 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 63 predicate places. [2024-05-12 10:40:58,517 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 73 transitions, 570 flow [2024-05-12 10:40:58,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:58,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:58,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:58,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:40:58,518 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:58,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1475065652, now seen corresponding path program 3 times [2024-05-12 10:40:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423337466] [2024-05-12 10:40:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:58,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:58,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423337466] [2024-05-12 10:40:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423337466] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:58,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:58,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812657995] [2024-05-12 10:40:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:58,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:58,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 73 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:58,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:58,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:58,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:58,881 INFO L124 PetriNetUnfolderBase]: 288/663 cut-off events. [2024-05-12 10:40:58,882 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2024-05-12 10:40:58,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 663 events. 288/663 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3833 event pairs, 114 based on Foata normal form. 6/635 useless extension candidates. Maximal degree in co-relation 2055. Up to 337 conditions per place. [2024-05-12 10:40:58,885 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 57 selfloop transitions, 32 changer transitions 0/99 dead transitions. [2024-05-12 10:40:58,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 99 transitions, 818 flow [2024-05-12 10:40:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-05-12 10:40:58,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-05-12 10:40:58,886 INFO L175 Difference]: Start difference. First operand has 100 places, 73 transitions, 570 flow. Second operand 8 states and 166 transitions. [2024-05-12 10:40:58,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 99 transitions, 818 flow [2024-05-12 10:40:58,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 99 transitions, 756 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:58,894 INFO L231 Difference]: Finished difference. Result has 102 places, 73 transitions, 575 flow [2024-05-12 10:40:58,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=575, PETRI_PLACES=102, PETRI_TRANSITIONS=73} [2024-05-12 10:40:58,895 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 65 predicate places. [2024-05-12 10:40:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 73 transitions, 575 flow [2024-05-12 10:40:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:58,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:58,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:40:58,895 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2104470868, now seen corresponding path program 4 times [2024-05-12 10:40:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072587977] [2024-05-12 10:40:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072587977] [2024-05-12 10:40:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072587977] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:59,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105873238] [2024-05-12 10:40:59,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:59,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:59,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 73 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:59,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:59,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:59,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:59,287 INFO L124 PetriNetUnfolderBase]: 320/728 cut-off events. [2024-05-12 10:40:59,287 INFO L125 PetriNetUnfolderBase]: For 4049/4049 co-relation queries the response was YES. [2024-05-12 10:40:59,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2280 conditions, 728 events. 320/728 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4432 event pairs, 156 based on Foata normal form. 8/696 useless extension candidates. Maximal degree in co-relation 2234. Up to 494 conditions per place. [2024-05-12 10:40:59,291 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 61 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-05-12 10:40:59,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 93 transitions, 793 flow [2024-05-12 10:40:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:40:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:40:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-05-12 10:40:59,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-05-12 10:40:59,292 INFO L175 Difference]: Start difference. First operand has 102 places, 73 transitions, 575 flow. Second operand 10 states and 188 transitions. [2024-05-12 10:40:59,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 93 transitions, 793 flow [2024-05-12 10:40:59,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 93 transitions, 730 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:59,301 INFO L231 Difference]: Finished difference. Result has 106 places, 73 transitions, 560 flow [2024-05-12 10:40:59,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=560, PETRI_PLACES=106, PETRI_TRANSITIONS=73} [2024-05-12 10:40:59,301 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 69 predicate places. [2024-05-12 10:40:59,302 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 73 transitions, 560 flow [2024-05-12 10:40:59,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:59,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:59,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:59,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:40:59,302 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:59,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2099108488, now seen corresponding path program 5 times [2024-05-12 10:40:59,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:59,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631994505] [2024-05-12 10:40:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:59,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:59,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631994505] [2024-05-12 10:40:59,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631994505] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:59,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:59,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:59,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184639816] [2024-05-12 10:40:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:59,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:59,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:59,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:40:59,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 73 transitions, 560 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:59,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:59,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:40:59,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:59,718 INFO L124 PetriNetUnfolderBase]: 352/805 cut-off events. [2024-05-12 10:40:59,719 INFO L125 PetriNetUnfolderBase]: For 4296/4296 co-relation queries the response was YES. [2024-05-12 10:40:59,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2441 conditions, 805 events. 352/805 cut-off events. For 4296/4296 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5101 event pairs, 182 based on Foata normal form. 8/767 useless extension candidates. Maximal degree in co-relation 2394. Up to 558 conditions per place. [2024-05-12 10:40:59,723 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 60 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-05-12 10:40:59,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 91 transitions, 770 flow [2024-05-12 10:40:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-05-12 10:40:59,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-05-12 10:40:59,724 INFO L175 Difference]: Start difference. First operand has 106 places, 73 transitions, 560 flow. Second operand 8 states and 158 transitions. [2024-05-12 10:40:59,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 91 transitions, 770 flow [2024-05-12 10:40:59,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 91 transitions, 728 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:59,733 INFO L231 Difference]: Finished difference. Result has 106 places, 73 transitions, 564 flow [2024-05-12 10:40:59,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=564, PETRI_PLACES=106, PETRI_TRANSITIONS=73} [2024-05-12 10:40:59,734 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 69 predicate places. [2024-05-12 10:40:59,734 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 73 transitions, 564 flow [2024-05-12 10:40:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:40:59,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:59,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:40:59,735 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:40:59,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -419748950, now seen corresponding path program 6 times [2024-05-12 10:40:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:59,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925175869] [2024-05-12 10:40:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925175869] [2024-05-12 10:40:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925175869] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:59,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:59,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015219485] [2024-05-12 10:40:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:00,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:00,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 73 transitions, 564 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:00,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:00,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:00,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:00,188 INFO L124 PetriNetUnfolderBase]: 374/868 cut-off events. [2024-05-12 10:41:00,188 INFO L125 PetriNetUnfolderBase]: For 4165/4165 co-relation queries the response was YES. [2024-05-12 10:41:00,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 868 events. 374/868 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5628 event pairs, 184 based on Foata normal form. 6/827 useless extension candidates. Maximal degree in co-relation 2529. Up to 470 conditions per place. [2024-05-12 10:41:00,193 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-05-12 10:41:00,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 96 transitions, 798 flow [2024-05-12 10:41:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-05-12 10:41:00,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-05-12 10:41:00,195 INFO L175 Difference]: Start difference. First operand has 106 places, 73 transitions, 564 flow. Second operand 8 states and 162 transitions. [2024-05-12 10:41:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 96 transitions, 798 flow [2024-05-12 10:41:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 758 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:00,206 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 569 flow [2024-05-12 10:41:00,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2024-05-12 10:41:00,207 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 71 predicate places. [2024-05-12 10:41:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 569 flow [2024-05-12 10:41:00,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:00,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:00,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:00,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:41:00,208 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:00,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash -414023498, now seen corresponding path program 1 times [2024-05-12 10:41:00,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:00,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195191508] [2024-05-12 10:41:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195191508] [2024-05-12 10:41:00,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195191508] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:00,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:00,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031804103] [2024-05-12 10:41:00,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:00,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:00,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:00,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:00,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:00,671 INFO L124 PetriNetUnfolderBase]: 396/930 cut-off events. [2024-05-12 10:41:00,671 INFO L125 PetriNetUnfolderBase]: For 4549/4549 co-relation queries the response was YES. [2024-05-12 10:41:00,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 930 events. 396/930 cut-off events. For 4549/4549 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6164 event pairs, 208 based on Foata normal form. 6/888 useless extension candidates. Maximal degree in co-relation 2671. Up to 516 conditions per place. [2024-05-12 10:41:00,676 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 23 changer transitions 0/98 dead transitions. [2024-05-12 10:41:00,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 811 flow [2024-05-12 10:41:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-05-12 10:41:00,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2024-05-12 10:41:00,677 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 569 flow. Second operand 10 states and 192 transitions. [2024-05-12 10:41:00,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 811 flow [2024-05-12 10:41:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 770 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:00,689 INFO L231 Difference]: Finished difference. Result has 112 places, 73 transitions, 577 flow [2024-05-12 10:41:00,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=112, PETRI_TRANSITIONS=73} [2024-05-12 10:41:00,690 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2024-05-12 10:41:00,690 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 73 transitions, 577 flow [2024-05-12 10:41:00,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:00,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:00,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:41:00,691 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:00,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1880241032, now seen corresponding path program 7 times [2024-05-12 10:41:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:00,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672136245] [2024-05-12 10:41:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672136245] [2024-05-12 10:41:00,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672136245] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:00,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841108870] [2024-05-12 10:41:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:00,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:00,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:00,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 73 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:00,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:00,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:00,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:01,093 INFO L124 PetriNetUnfolderBase]: 428/1023 cut-off events. [2024-05-12 10:41:01,094 INFO L125 PetriNetUnfolderBase]: For 5547/5547 co-relation queries the response was YES. [2024-05-12 10:41:01,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 1023 events. 428/1023 cut-off events. For 5547/5547 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7013 event pairs, 205 based on Foata normal form. 8/978 useless extension candidates. Maximal degree in co-relation 2880. Up to 681 conditions per place. [2024-05-12 10:41:01,101 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 63 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2024-05-12 10:41:01,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 92 transitions, 793 flow [2024-05-12 10:41:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-05-12 10:41:01,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 10:41:01,103 INFO L175 Difference]: Start difference. First operand has 112 places, 73 transitions, 577 flow. Second operand 6 states and 130 transitions. [2024-05-12 10:41:01,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 92 transitions, 793 flow [2024-05-12 10:41:01,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 92 transitions, 748 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:01,113 INFO L231 Difference]: Finished difference. Result has 110 places, 73 transitions, 578 flow [2024-05-12 10:41:01,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=110, PETRI_TRANSITIONS=73} [2024-05-12 10:41:01,114 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 73 predicate places. [2024-05-12 10:41:01,114 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 73 transitions, 578 flow [2024-05-12 10:41:01,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:01,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:01,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:41:01,115 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:01,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash 341282080, now seen corresponding path program 8 times [2024-05-12 10:41:01,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:01,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812586497] [2024-05-12 10:41:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:01,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:01,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:01,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812586497] [2024-05-12 10:41:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812586497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:01,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:01,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343762374] [2024-05-12 10:41:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:01,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:01,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 73 transitions, 578 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:01,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:01,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:01,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:01,523 INFO L124 PetriNetUnfolderBase]: 460/1055 cut-off events. [2024-05-12 10:41:01,524 INFO L125 PetriNetUnfolderBase]: For 6063/6063 co-relation queries the response was YES. [2024-05-12 10:41:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 1055 events. 460/1055 cut-off events. For 6063/6063 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7318 event pairs, 258 based on Foata normal form. 8/1000 useless extension candidates. Maximal degree in co-relation 3041. Up to 689 conditions per place. [2024-05-12 10:41:01,530 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-05-12 10:41:01,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 93 transitions, 798 flow [2024-05-12 10:41:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-05-12 10:41:01,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 10:41:01,531 INFO L175 Difference]: Start difference. First operand has 110 places, 73 transitions, 578 flow. Second operand 7 states and 145 transitions. [2024-05-12 10:41:01,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 93 transitions, 798 flow [2024-05-12 10:41:01,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 93 transitions, 762 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:01,546 INFO L231 Difference]: Finished difference. Result has 112 places, 73 transitions, 608 flow [2024-05-12 10:41:01,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=112, PETRI_TRANSITIONS=73} [2024-05-12 10:41:01,547 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2024-05-12 10:41:01,547 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 73 transitions, 608 flow [2024-05-12 10:41:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:01,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:01,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:41:01,547 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:01,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1686301622, now seen corresponding path program 9 times [2024-05-12 10:41:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:01,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563278151] [2024-05-12 10:41:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:01,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563278151] [2024-05-12 10:41:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563278151] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:01,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:01,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808391719] [2024-05-12 10:41:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:01,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:01,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:01,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 73 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:01,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:01,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:01,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:01,983 INFO L124 PetriNetUnfolderBase]: 492/1135 cut-off events. [2024-05-12 10:41:01,983 INFO L125 PetriNetUnfolderBase]: For 6503/6503 co-relation queries the response was YES. [2024-05-12 10:41:01,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 1135 events. 492/1135 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8118 event pairs, 290 based on Foata normal form. 8/1074 useless extension candidates. Maximal degree in co-relation 3230. Up to 753 conditions per place. [2024-05-12 10:41:01,989 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 32 changer transitions 0/95 dead transitions. [2024-05-12 10:41:01,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 95 transitions, 836 flow [2024-05-12 10:41:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-05-12 10:41:01,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-05-12 10:41:01,990 INFO L175 Difference]: Start difference. First operand has 112 places, 73 transitions, 608 flow. Second operand 9 states and 177 transitions. [2024-05-12 10:41:01,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 95 transitions, 836 flow [2024-05-12 10:41:02,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 95 transitions, 776 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:02,007 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 618 flow [2024-05-12 10:41:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=618, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2024-05-12 10:41:02,007 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-05-12 10:41:02,007 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 618 flow [2024-05-12 10:41:02,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:02,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:41:02,008 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:02,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1680791372, now seen corresponding path program 10 times [2024-05-12 10:41:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100605455] [2024-05-12 10:41:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:02,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100605455] [2024-05-12 10:41:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100605455] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:02,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424872072] [2024-05-12 10:41:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:02,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:02,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 618 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:02,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:02,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:02,425 INFO L124 PetriNetUnfolderBase]: 501/1158 cut-off events. [2024-05-12 10:41:02,425 INFO L125 PetriNetUnfolderBase]: For 5129/5129 co-relation queries the response was YES. [2024-05-12 10:41:02,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3283 conditions, 1158 events. 501/1158 cut-off events. For 5129/5129 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8317 event pairs, 225 based on Foata normal form. 6/1101 useless extension candidates. Maximal degree in co-relation 3232. Up to 416 conditions per place. [2024-05-12 10:41:02,431 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 57 selfloop transitions, 31 changer transitions 0/98 dead transitions. [2024-05-12 10:41:02,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 862 flow [2024-05-12 10:41:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 10:41:02,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2024-05-12 10:41:02,432 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 618 flow. Second operand 7 states and 149 transitions. [2024-05-12 10:41:02,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 862 flow [2024-05-12 10:41:02,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 98 transitions, 798 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:02,446 INFO L231 Difference]: Finished difference. Result has 114 places, 73 transitions, 620 flow [2024-05-12 10:41:02,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=620, PETRI_PLACES=114, PETRI_TRANSITIONS=73} [2024-05-12 10:41:02,446 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2024-05-12 10:41:02,447 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 73 transitions, 620 flow [2024-05-12 10:41:02,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:02,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:02,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:41:02,447 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:02,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1686516824, now seen corresponding path program 2 times [2024-05-12 10:41:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:02,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236301110] [2024-05-12 10:41:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:02,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236301110] [2024-05-12 10:41:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236301110] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:02,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:02,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:02,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977000086] [2024-05-12 10:41:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:02,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:02,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:02,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 73 transitions, 620 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:02,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:02,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:02,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:02,896 INFO L124 PetriNetUnfolderBase]: 523/1252 cut-off events. [2024-05-12 10:41:02,896 INFO L125 PetriNetUnfolderBase]: For 5335/5335 co-relation queries the response was YES. [2024-05-12 10:41:02,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 1252 events. 523/1252 cut-off events. For 5335/5335 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9138 event pairs, 297 based on Foata normal form. 6/1192 useless extension candidates. Maximal degree in co-relation 3412. Up to 554 conditions per place. [2024-05-12 10:41:02,903 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 56 selfloop transitions, 34 changer transitions 0/100 dead transitions. [2024-05-12 10:41:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 100 transitions, 872 flow [2024-05-12 10:41:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-05-12 10:41:02,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746031746031746 [2024-05-12 10:41:02,904 INFO L175 Difference]: Start difference. First operand has 114 places, 73 transitions, 620 flow. Second operand 9 states and 181 transitions. [2024-05-12 10:41:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 100 transitions, 872 flow [2024-05-12 10:41:02,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 100 transitions, 809 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:02,918 INFO L231 Difference]: Finished difference. Result has 117 places, 73 transitions, 629 flow [2024-05-12 10:41:02,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=629, PETRI_PLACES=117, PETRI_TRANSITIONS=73} [2024-05-12 10:41:02,919 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2024-05-12 10:41:02,919 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 73 transitions, 629 flow [2024-05-12 10:41:02,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:02,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:02,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:02,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:41:02,920 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:02,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1880456234, now seen corresponding path program 3 times [2024-05-12 10:41:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949480793] [2024-05-12 10:41:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:03,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:03,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949480793] [2024-05-12 10:41:03,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949480793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:03,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:03,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040620784] [2024-05-12 10:41:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:03,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:03,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:03,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:03,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:03,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 73 transitions, 629 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:03,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:03,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:03,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:03,380 INFO L124 PetriNetUnfolderBase]: 545/1314 cut-off events. [2024-05-12 10:41:03,380 INFO L125 PetriNetUnfolderBase]: For 5321/5321 co-relation queries the response was YES. [2024-05-12 10:41:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 1314 events. 545/1314 cut-off events. For 5321/5321 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9823 event pairs, 293 based on Foata normal form. 6/1255 useless extension candidates. Maximal degree in co-relation 3552. Up to 858 conditions per place. [2024-05-12 10:41:03,386 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 67 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-05-12 10:41:03,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 94 transitions, 855 flow [2024-05-12 10:41:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-05-12 10:41:03,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 10:41:03,387 INFO L175 Difference]: Start difference. First operand has 117 places, 73 transitions, 629 flow. Second operand 6 states and 130 transitions. [2024-05-12 10:41:03,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 94 transitions, 855 flow [2024-05-12 10:41:03,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 94 transitions, 786 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:03,400 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 597 flow [2024-05-12 10:41:03,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=597, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2024-05-12 10:41:03,401 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-05-12 10:41:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 597 flow [2024-05-12 10:41:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:03,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:03,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:03,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:41:03,402 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:03,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 427215162, now seen corresponding path program 4 times [2024-05-12 10:41:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:03,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931541881] [2024-05-12 10:41:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931541881] [2024-05-12 10:41:03,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931541881] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:03,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:03,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096450993] [2024-05-12 10:41:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:03,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:03,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:41:03,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 597 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:03,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:03,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:41:03,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:03,845 INFO L124 PetriNetUnfolderBase]: 538/1297 cut-off events. [2024-05-12 10:41:03,845 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2024-05-12 10:41:03,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 1297 events. 538/1297 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9616 event pairs, 278 based on Foata normal form. 6/1238 useless extension candidates. Maximal degree in co-relation 3347. Up to 761 conditions per place. [2024-05-12 10:41:03,852 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 69 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-05-12 10:41:03,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 97 transitions, 783 flow [2024-05-12 10:41:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-05-12 10:41:03,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:41:03,853 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 597 flow. Second operand 7 states and 147 transitions. [2024-05-12 10:41:03,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 97 transitions, 783 flow [2024-05-12 10:41:03,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 97 transitions, 640 flow, removed 5 selfloop flow, removed 29 redundant places. [2024-05-12 10:41:03,858 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 442 flow [2024-05-12 10:41:03,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-05-12 10:41:03,859 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2024-05-12 10:41:03,859 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 442 flow [2024-05-12 10:41:03,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-05-12 10:41:03,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:03,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:03,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:41:03,860 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:03,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash -892519276, now seen corresponding path program 1 times [2024-05-12 10:41:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078830003] [2024-05-12 10:41:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:03,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:03,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:03,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078830003] [2024-05-12 10:41:03,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078830003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:03,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:03,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:03,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365414799] [2024-05-12 10:41:03,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:03,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:41:03,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:03,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:41:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:41:03,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 10:41:03,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-05-12 10:41:03,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:03,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 10:41:03,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:04,038 INFO L124 PetriNetUnfolderBase]: 410/1173 cut-off events. [2024-05-12 10:41:04,039 INFO L125 PetriNetUnfolderBase]: For 388/389 co-relation queries the response was YES. [2024-05-12 10:41:04,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 1173 events. 410/1173 cut-off events. For 388/389 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8622 event pairs, 20 based on Foata normal form. 97/1225 useless extension candidates. Maximal degree in co-relation 2479. Up to 344 conditions per place. [2024-05-12 10:41:04,042 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 20 selfloop transitions, 24 changer transitions 1/82 dead transitions. [2024-05-12 10:41:04,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 82 transitions, 555 flow [2024-05-12 10:41:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-05-12 10:41:04,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-05-12 10:41:04,045 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 442 flow. Second operand 5 states and 119 transitions. [2024-05-12 10:41:04,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 82 transitions, 555 flow [2024-05-12 10:41:04,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 82 transitions, 518 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:04,047 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 482 flow [2024-05-12 10:41:04,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2024-05-12 10:41:04,047 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2024-05-12 10:41:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 482 flow [2024-05-12 10:41:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-05-12 10:41:04,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:04,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:04,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:41:04,048 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1013965456, now seen corresponding path program 1 times [2024-05-12 10:41:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:04,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222795972] [2024-05-12 10:41:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:04,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:04,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:04,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222795972] [2024-05-12 10:41:04,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222795972] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:04,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:04,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:04,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574144474] [2024-05-12 10:41:04,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:04,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:04,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2024-05-12 10:41:04,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-05-12 10:41:04,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:04,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2024-05-12 10:41:04,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:04,283 INFO L124 PetriNetUnfolderBase]: 310/842 cut-off events. [2024-05-12 10:41:04,284 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-05-12 10:41:04,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 842 events. 310/842 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5553 event pairs, 112 based on Foata normal form. 44/805 useless extension candidates. Maximal degree in co-relation 2173. Up to 277 conditions per place. [2024-05-12 10:41:04,286 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 17 selfloop transitions, 4 changer transitions 50/88 dead transitions. [2024-05-12 10:41:04,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 88 transitions, 616 flow [2024-05-12 10:41:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 10:41:04,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2024-05-12 10:41:04,289 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 482 flow. Second operand 7 states and 149 transitions. [2024-05-12 10:41:04,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 88 transitions, 616 flow [2024-05-12 10:41:04,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 514 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:04,292 INFO L231 Difference]: Finished difference. Result has 95 places, 35 transitions, 134 flow [2024-05-12 10:41:04,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=95, PETRI_TRANSITIONS=35} [2024-05-12 10:41:04,292 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2024-05-12 10:41:04,293 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 35 transitions, 134 flow [2024-05-12 10:41:04,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-05-12 10:41:04,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:04,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:04,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:41:04,293 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:41:04,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash 781010662, now seen corresponding path program 2 times [2024-05-12 10:41:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:04,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241306564] [2024-05-12 10:41:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:04,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:04,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241306564] [2024-05-12 10:41:04,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241306564] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:04,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:04,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009863462] [2024-05-12 10:41:04,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:04,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2024-05-12 10:41:04,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 35 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 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) [2024-05-12 10:41:04,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:04,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2024-05-12 10:41:04,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:04,463 INFO L124 PetriNetUnfolderBase]: 65/191 cut-off events. [2024-05-12 10:41:04,463 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-05-12 10:41:04,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 191 events. 65/191 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 739 event pairs, 14 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 428. Up to 73 conditions per place. [2024-05-12 10:41:04,464 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-05-12 10:41:04,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 39 transitions, 188 flow [2024-05-12 10:41:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-05-12 10:41:04,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 10:41:04,466 INFO L175 Difference]: Start difference. First operand has 95 places, 35 transitions, 134 flow. Second operand 6 states and 119 transitions. [2024-05-12 10:41:04,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 39 transitions, 188 flow [2024-05-12 10:41:04,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 39 transitions, 163 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 10:41:04,467 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-05-12 10:41:04,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-05-12 10:41:04,467 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2024-05-12 10:41:04,467 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-05-12 10:41:04,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 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) [2024-05-12 10:41:04,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 10:41:04,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 10:41:04,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 10:41:04,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 10:41:04,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 10:41:04,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:41:04,472 INFO L445 BasicCegarLoop]: Path program histogram: [10, 6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:04,474 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 10:41:04,474 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 10:41:04,479 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 10:41:04,479 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 10:41:04,480 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 10:41:04 BasicIcfg [2024-05-12 10:41:04,480 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 10:41:04,480 INFO L158 Benchmark]: Toolchain (without parser) took 19085.10ms. Allocated memory was 174.1MB in the beginning and 564.1MB in the end (delta: 390.1MB). Free memory was 139.6MB in the beginning and 356.7MB in the end (delta: -217.1MB). Peak memory consumption was 172.9MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: Witness Parser took 0.10ms. Allocated memory is still 174.1MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.86ms. Allocated memory is still 174.1MB. Free memory was 138.6MB in the beginning and 110.3MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.90ms. Allocated memory is still 174.1MB. Free memory was 110.3MB in the beginning and 108.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: Boogie Preprocessor took 32.97ms. Allocated memory is still 174.1MB. Free memory was 108.1MB in the beginning and 105.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,481 INFO L158 Benchmark]: RCFGBuilder took 493.68ms. Allocated memory is still 174.1MB. Free memory was 105.0MB in the beginning and 71.4MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,482 INFO L158 Benchmark]: TraceAbstraction took 18062.42ms. Allocated memory was 174.1MB in the beginning and 564.1MB in the end (delta: 390.1MB). Free memory was 70.4MB in the beginning and 356.7MB in the end (delta: -286.3MB). Peak memory consumption was 103.7MB. Max. memory is 16.1GB. [2024-05-12 10:41:04,483 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.10ms. Allocated memory is still 174.1MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.86ms. Allocated memory is still 174.1MB. Free memory was 138.6MB in the beginning and 110.3MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.90ms. Allocated memory is still 174.1MB. Free memory was 110.3MB in the beginning and 108.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.97ms. Allocated memory is still 174.1MB. Free memory was 108.1MB in the beginning and 105.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 493.68ms. Allocated memory is still 174.1MB. Free memory was 105.0MB in the beginning and 71.4MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 18062.42ms. Allocated memory was 174.1MB in the beginning and 564.1MB in the end (delta: 390.1MB). Free memory was 70.4MB in the beginning and 356.7MB in the end (delta: -286.3MB). Peak memory consumption was 103.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.0s, OverallIterations: 43, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2353 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1921 mSDsluCounter, 408 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 272 mSDsCounter, 225 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7789 IncrementalHoareTripleChecker+Invalid, 8014 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 225 mSolverCounterUnsat, 136 mSDtfsCounter, 7789 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 292 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=629occurred in iteration=38, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 677 NumberOfCodeBlocks, 677 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 634 ConstructedInterpolants, 0 QuantifiedInterpolants, 5715 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 43 InterpolantComputations, 43 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 10:41:04,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE