./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix050.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix050.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix050.i ./goblint.2024-05-21_14-57-05.files/protection/mix050.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:19:53,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:19:53,646 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:19:53,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:19:53,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:19:53,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:19:53,663 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:19:53,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:19:53,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:19:53,664 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:19:53,664 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:19:53,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:19:53,665 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:19:53,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:19:53,666 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:19:53,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:19:53,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:19:53,666 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:19:53,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:19:53,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:19:53,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:19:53,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:19:53,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:19:53,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:19:53,668 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:19:53,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:19:53,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:19:53,669 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:19:53,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:19:53,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:19:53,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:19:53,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:19:53,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:19:53,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:19:53,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:19:53,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:19:53,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:19:53,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:19:53,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:19:53,672 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:19:53,672 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:19:53,672 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:19:53,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:19:53,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:19:53,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:19:53,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:19:53,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:19:53,919 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:19:53,920 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:19:53,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-04 15:19:55,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:19:55,232 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:19:55,233 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-04 15:19:55,250 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541f7ec4c/fac8492710bd411dae664f24165a883f/FLAGc513169e9 [2024-06-04 15:19:55,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541f7ec4c/fac8492710bd411dae664f24165a883f [2024-06-04 15:19:55,263 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:19:55,263 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:19:55,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix050.yml/witness.yml [2024-06-04 15:19:55,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:19:55,494 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:19:55,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:19:55,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:19:55,500 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:19:55,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:19:55" (1/2) ... [2024-06-04 15:19:55,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181bc458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:19:55, skipping insertion in model container [2024-06-04 15:19:55,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:19:55" (1/2) ... [2024-06-04 15:19:55,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4057abef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:19:55, skipping insertion in model container [2024-06-04 15:19:55,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:19:55" (2/2) ... [2024-06-04 15:19:55,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181bc458 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:55, skipping insertion in model container [2024-06-04 15:19:55,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:19:55" (2/2) ... [2024-06-04 15:19:55,506 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:19:55,594 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:19:55,595 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 15:19:55,596 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 15:19:55,596 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 15:19:55,596 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 15:19:55,596 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:19:55,597 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-04 15:19:55,639 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:19:55,980 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:19:56,004 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:19:56,135 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:19:56,177 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:19:56,177 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56 WrapperNode [2024-06-04 15:19:56,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:19:56,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:19:56,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:19:56,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:19:56,184 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 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,198 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 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,246 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-04 15:19:56,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:19:56,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:19:56,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:19:56,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:19:56,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,274 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,292 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:19:56,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:19:56,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:19:56,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:19:56,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:19:56,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (1/1) ... [2024-06-04 15:19:56,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:19:56,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:19:56,354 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) [2024-06-04 15:19:56,374 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 [2024-06-04 15:19:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:19:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:19:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:19:56,389 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:19:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:19:56,389 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:19:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:19:56,389 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:19:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:19:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:19:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:19:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:19:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:19:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:19:56,392 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:19:56,532 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:19:56,533 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:19:56,881 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:19:56,881 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:19:56,994 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:19:56,994 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:19:56,995 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:19:56 BoogieIcfgContainer [2024-06-04 15:19:56,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:19:56,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:19:56,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:19:57,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:19:57,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:19:55" (1/4) ... [2024-06-04 15:19:57,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a216ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:19:57, skipping insertion in model container [2024-06-04 15:19:57,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:19:55" (2/4) ... [2024-06-04 15:19:57,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a216ad0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:19:57, skipping insertion in model container [2024-06-04 15:19:57,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:19:56" (3/4) ... [2024-06-04 15:19:57,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a216ad0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:19:57, skipping insertion in model container [2024-06-04 15:19:57,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:19:56" (4/4) ... [2024-06-04 15:19:57,002 INFO L112 eAbstractionObserver]: Analyzing ICFG mix050.i [2024-06-04 15:19:57,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:19:57,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:19:57,015 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:19:57,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:19:57,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 15:19:57,130 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-04 15:19:57,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:19:57,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:19:57,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 15:19:57,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-04 15:19:57,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:19:57,155 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;@198ebf36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:19:57,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:19:57,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:19:57,160 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:19:57,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:19:57,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:57,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:19:57,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:57,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -328063496, now seen corresponding path program 1 times [2024-06-04 15:19:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117917761] [2024-06-04 15:19:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:57,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:58,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:58,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117917761] [2024-06-04 15:19:58,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117917761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:58,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:58,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:19:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041495540] [2024-06-04 15:19:58,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:58,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:19:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:58,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:19:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:19:58,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-04 15:19:58,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:58,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:58,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-04 15:19:58,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:59,750 INFO L124 PetriNetUnfolderBase]: 7892/10908 cut-off events. [2024-06-04 15:19:59,750 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-04 15:19:59,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21987 conditions, 10908 events. 7892/10908 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57405 event pairs, 6010 based on Foata normal form. 1/10753 useless extension candidates. Maximal degree in co-relation 21971. Up to 10748 conditions per place. [2024-06-04 15:19:59,812 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-04 15:19:59,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 231 flow [2024-06-04 15:19:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:19:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:19:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-04 15:19:59,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-04 15:19:59,823 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 95 transitions. [2024-06-04 15:19:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 231 flow [2024-06-04 15:19:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:59,829 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-04 15:19:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-04 15:19:59,833 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-04 15:19:59,834 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-04 15:19:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:59,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:59,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:59,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:19:59,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:59,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1736352489, now seen corresponding path program 1 times [2024-06-04 15:19:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:59,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567720187] [2024-06-04 15:19:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567720187] [2024-06-04 15:20:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567720187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:00,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:20:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090421746] [2024-06-04 15:20:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:20:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:20:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:20:00,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-04 15:20:00,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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) [2024-06-04 15:20:00,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:00,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-04 15:20:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:01,795 INFO L124 PetriNetUnfolderBase]: 7882/10905 cut-off events. [2024-06-04 15:20:01,795 INFO L125 PetriNetUnfolderBase]: For 2124/2124 co-relation queries the response was YES. [2024-06-04 15:20:01,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24945 conditions, 10905 events. 7882/10905 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57494 event pairs, 5323 based on Foata normal form. 4/10905 useless extension candidates. Maximal degree in co-relation 24930. Up to 10713 conditions per place. [2024-06-04 15:20:01,850 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-04 15:20:01,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 323 flow [2024-06-04 15:20:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:20:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:20:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-04 15:20:01,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-04 15:20:01,853 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-04 15:20:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 323 flow [2024-06-04 15:20:01,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:20:01,855 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-04 15:20:01,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-04 15:20:01,856 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-04 15:20:01,856 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-04 15:20:01,856 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) [2024-06-04 15:20:01,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:01,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:01,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:20:01,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:01,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2107592758, now seen corresponding path program 1 times [2024-06-04 15:20:01,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:01,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235245357] [2024-06-04 15:20:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:01,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235245357] [2024-06-04 15:20:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235245357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:02,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:02,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:20:02,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443314807] [2024-06-04 15:20:02,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:02,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:20:02,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:20:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:20:03,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-04 15:20:03,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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) [2024-06-04 15:20:03,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:03,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-04 15:20:03,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:04,375 INFO L124 PetriNetUnfolderBase]: 9557/13166 cut-off events. [2024-06-04 15:20:04,376 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-04 15:20:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33407 conditions, 13166 events. 9557/13166 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69756 event pairs, 5407 based on Foata normal form. 4/13166 useless extension candidates. Maximal degree in co-relation 33390. Up to 12912 conditions per place. [2024-06-04 15:20:04,543 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 75 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-04 15:20:04,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 510 flow [2024-06-04 15:20:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:20:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:20:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-04 15:20:04,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-04 15:20:04,546 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 174 transitions. [2024-06-04 15:20:04,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 510 flow [2024-06-04 15:20:04,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 482 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 15:20:04,550 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 256 flow [2024-06-04 15:20:04,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-04 15:20:04,551 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-04 15:20:04,551 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 256 flow [2024-06-04 15:20:04,552 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) [2024-06-04 15:20:04,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:04,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:04,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:20:04,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:04,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash 910867886, now seen corresponding path program 1 times [2024-06-04 15:20:04,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:04,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606559476] [2024-06-04 15:20:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:05,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:05,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606559476] [2024-06-04 15:20:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606559476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:05,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:05,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:20:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130844739] [2024-06-04 15:20:05,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:20:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:20:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:20:05,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-04 15:20:05,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:05,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:05,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-04 15:20:05,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:07,609 INFO L124 PetriNetUnfolderBase]: 9541/13144 cut-off events. [2024-06-04 15:20:07,609 INFO L125 PetriNetUnfolderBase]: For 14290/14290 co-relation queries the response was YES. [2024-06-04 15:20:07,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37271 conditions, 13144 events. 9541/13144 cut-off events. For 14290/14290 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69825 event pairs, 4602 based on Foata normal form. 8/13148 useless extension candidates. Maximal degree in co-relation 37252. Up to 12846 conditions per place. [2024-06-04 15:20:07,673 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-04 15:20:07,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 108 transitions, 600 flow [2024-06-04 15:20:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-04 15:20:07,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-04 15:20:07,677 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 256 flow. Second operand 7 states and 197 transitions. [2024-06-04 15:20:07,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 108 transitions, 600 flow [2024-06-04 15:20:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 108 transitions, 561 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 15:20:07,685 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 289 flow [2024-06-04 15:20:07,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=289, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-04 15:20:07,687 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-04 15:20:07,687 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 289 flow [2024-06-04 15:20:07,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:07,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:07,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:07,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:20:07,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:07,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash -270669970, now seen corresponding path program 1 times [2024-06-04 15:20:07,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:07,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526389036] [2024-06-04 15:20:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:07,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:08,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:08,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526389036] [2024-06-04 15:20:08,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526389036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:08,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:08,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:20:08,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221613974] [2024-06-04 15:20:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:08,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:20:08,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:20:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:20:08,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:08,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:08,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:08,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:08,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:09,796 INFO L124 PetriNetUnfolderBase]: 9523/13168 cut-off events. [2024-06-04 15:20:09,797 INFO L125 PetriNetUnfolderBase]: For 22227/22227 co-relation queries the response was YES. [2024-06-04 15:20:09,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40000 conditions, 13168 events. 9523/13168 cut-off events. For 22227/22227 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70094 event pairs, 4907 based on Foata normal form. 6/13170 useless extension candidates. Maximal degree in co-relation 39980. Up to 12897 conditions per place. [2024-06-04 15:20:09,864 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-04 15:20:09,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 513 flow [2024-06-04 15:20:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:20:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:20:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 15:20:09,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-04 15:20:09,866 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 289 flow. Second operand 5 states and 124 transitions. [2024-06-04 15:20:09,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 513 flow [2024-06-04 15:20:09,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:20:09,871 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 300 flow [2024-06-04 15:20:09,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-04 15:20:09,871 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-04 15:20:09,871 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 300 flow [2024-06-04 15:20:09,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:09,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:09,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:20:09,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:09,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1113809871, now seen corresponding path program 1 times [2024-06-04 15:20:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455539936] [2024-06-04 15:20:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:10,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:10,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455539936] [2024-06-04 15:20:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455539936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:10,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:20:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994275259] [2024-06-04 15:20:10,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:10,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:20:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:20:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:20:10,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:10,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:10,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:10,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:12,230 INFO L124 PetriNetUnfolderBase]: 9598/13263 cut-off events. [2024-06-04 15:20:12,230 INFO L125 PetriNetUnfolderBase]: For 31479/31479 co-relation queries the response was YES. [2024-06-04 15:20:12,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43577 conditions, 13263 events. 9598/13263 cut-off events. For 31479/31479 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70267 event pairs, 4669 based on Foata normal form. 6/13262 useless extension candidates. Maximal degree in co-relation 43555. Up to 12924 conditions per place. [2024-06-04 15:20:12,298 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 81 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-04 15:20:12,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 713 flow [2024-06-04 15:20:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:20:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:20:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 15:20:12,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:20:12,300 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 300 flow. Second operand 6 states and 156 transitions. [2024-06-04 15:20:12,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 713 flow [2024-06-04 15:20:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 659 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 15:20:12,307 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 422 flow [2024-06-04 15:20:12,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-04 15:20:12,308 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-04 15:20:12,308 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 422 flow [2024-06-04 15:20:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:12,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:12,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:20:12,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1070703441, now seen corresponding path program 2 times [2024-06-04 15:20:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766852938] [2024-06-04 15:20:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766852938] [2024-06-04 15:20:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766852938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:13,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:13,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:20:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518286133] [2024-06-04 15:20:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:13,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:20:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:20:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:20:13,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:13,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:13,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:13,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:13,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:14,964 INFO L124 PetriNetUnfolderBase]: 9580/13244 cut-off events. [2024-06-04 15:20:14,965 INFO L125 PetriNetUnfolderBase]: For 43724/43724 co-relation queries the response was YES. [2024-06-04 15:20:14,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47548 conditions, 13244 events. 9580/13244 cut-off events. For 43724/43724 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70201 event pairs, 4762 based on Foata normal form. 6/13246 useless extension candidates. Maximal degree in co-relation 47524. Up to 12960 conditions per place. [2024-06-04 15:20:15,053 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 81 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-04 15:20:15,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 678 flow [2024-06-04 15:20:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:20:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:20:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 15:20:15,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-04 15:20:15,054 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 422 flow. Second operand 6 states and 147 transitions. [2024-06-04 15:20:15,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 678 flow [2024-06-04 15:20:15,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 101 transitions, 632 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-04 15:20:15,081 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 415 flow [2024-06-04 15:20:15,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-04 15:20:15,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-04 15:20:15,082 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 415 flow [2024-06-04 15:20:15,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:15,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:15,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:15,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:20:15,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:15,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2051470763, now seen corresponding path program 1 times [2024-06-04 15:20:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94493036] [2024-06-04 15:20:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:16,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94493036] [2024-06-04 15:20:16,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94493036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:16,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:16,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:20:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753254903] [2024-06-04 15:20:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:16,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:20:16,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:20:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:20:16,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:16,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:16,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:16,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:16,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:18,004 INFO L124 PetriNetUnfolderBase]: 9624/13281 cut-off events. [2024-06-04 15:20:18,005 INFO L125 PetriNetUnfolderBase]: For 49768/49768 co-relation queries the response was YES. [2024-06-04 15:20:18,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48252 conditions, 13281 events. 9624/13281 cut-off events. For 49768/49768 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70362 event pairs, 4668 based on Foata normal form. 6/13283 useless extension candidates. Maximal degree in co-relation 48225. Up to 12993 conditions per place. [2024-06-04 15:20:18,070 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 94 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-06-04 15:20:18,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 777 flow [2024-06-04 15:20:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 15:20:18,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-04 15:20:18,072 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 415 flow. Second operand 7 states and 176 transitions. [2024-06-04 15:20:18,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 777 flow [2024-06-04 15:20:18,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 118 transitions, 730 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:18,096 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 461 flow [2024-06-04 15:20:18,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-04 15:20:18,099 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-04 15:20:18,099 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 461 flow [2024-06-04 15:20:18,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:18,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:18,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:18,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:20:18,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:18,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:18,100 INFO L85 PathProgramCache]: Analyzing trace with hash -168366437, now seen corresponding path program 2 times [2024-06-04 15:20:18,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:18,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195785746] [2024-06-04 15:20:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:18,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195785746] [2024-06-04 15:20:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195785746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:19,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:20:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526822920] [2024-06-04 15:20:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:19,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:20:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:20:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:20:19,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:19,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:19,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:19,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:19,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:20,526 INFO L124 PetriNetUnfolderBase]: 9699/13383 cut-off events. [2024-06-04 15:20:20,526 INFO L125 PetriNetUnfolderBase]: For 64147/64147 co-relation queries the response was YES. [2024-06-04 15:20:20,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52091 conditions, 13383 events. 9699/13383 cut-off events. For 64147/64147 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70869 event pairs, 4479 based on Foata normal form. 6/13382 useless extension candidates. Maximal degree in co-relation 52065. Up to 12935 conditions per place. [2024-06-04 15:20:20,611 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 87 selfloop transitions, 35 changer transitions 0/128 dead transitions. [2024-06-04 15:20:20,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 951 flow [2024-06-04 15:20:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 15:20:20,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:20:20,615 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 461 flow. Second operand 7 states and 182 transitions. [2024-06-04 15:20:20,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 951 flow [2024-06-04 15:20:20,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 128 transitions, 890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:20:20,636 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 581 flow [2024-06-04 15:20:20,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2024-06-04 15:20:20,636 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-04 15:20:20,636 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 581 flow [2024-06-04 15:20:20,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:20,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:20,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:20:20,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1167932893, now seen corresponding path program 3 times [2024-06-04 15:20:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:20,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191664405] [2024-06-04 15:20:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:20,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:21,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:21,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191664405] [2024-06-04 15:20:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191664405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:21,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:20:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654854905] [2024-06-04 15:20:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:20:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:20:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:20:21,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:21,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:21,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:21,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:21,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:23,219 INFO L124 PetriNetUnfolderBase]: 9681/13364 cut-off events. [2024-06-04 15:20:23,219 INFO L125 PetriNetUnfolderBase]: For 81727/81727 co-relation queries the response was YES. [2024-06-04 15:20:23,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55286 conditions, 13364 events. 9681/13364 cut-off events. For 81727/81727 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70783 event pairs, 4675 based on Foata normal form. 6/13366 useless extension candidates. Maximal degree in co-relation 55259. Up to 13060 conditions per place. [2024-06-04 15:20:23,293 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 97 selfloop transitions, 18 changer transitions 0/121 dead transitions. [2024-06-04 15:20:23,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 899 flow [2024-06-04 15:20:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 15:20:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-04 15:20:23,295 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 581 flow. Second operand 7 states and 171 transitions. [2024-06-04 15:20:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 899 flow [2024-06-04 15:20:23,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 815 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 15:20:23,329 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 544 flow [2024-06-04 15:20:23,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-06-04 15:20:23,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-04 15:20:23,330 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 544 flow [2024-06-04 15:20:23,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:23,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:23,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:23,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:20:23,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:23,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1874088329, now seen corresponding path program 1 times [2024-06-04 15:20:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:23,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277132759] [2024-06-04 15:20:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:23,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277132759] [2024-06-04 15:20:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277132759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:24,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:24,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:24,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330826235] [2024-06-04 15:20:24,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:24,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:24,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:24,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:24,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:20:24,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 544 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:24,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:24,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:20:24,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:26,720 INFO L124 PetriNetUnfolderBase]: 11757/16150 cut-off events. [2024-06-04 15:20:26,720 INFO L125 PetriNetUnfolderBase]: For 108178/108178 co-relation queries the response was YES. [2024-06-04 15:20:26,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66385 conditions, 16150 events. 11757/16150 cut-off events. For 108178/108178 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 85476 event pairs, 5691 based on Foata normal form. 6/16152 useless extension candidates. Maximal degree in co-relation 66356. Up to 15837 conditions per place. [2024-06-04 15:20:26,803 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 102 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-06-04 15:20:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 945 flow [2024-06-04 15:20:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 15:20:26,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-04 15:20:26,805 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 544 flow. Second operand 7 states and 164 transitions. [2024-06-04 15:20:26,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 945 flow [2024-06-04 15:20:26,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 879 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:26,847 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 616 flow [2024-06-04 15:20:26,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-04 15:20:26,848 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-04 15:20:26,848 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 616 flow [2024-06-04 15:20:26,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:26,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:26,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:26,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:20:26,849 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:26,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1612175442, now seen corresponding path program 1 times [2024-06-04 15:20:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:26,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028556572] [2024-06-04 15:20:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:27,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:27,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028556572] [2024-06-04 15:20:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028556572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:27,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:27,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:20:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913065504] [2024-06-04 15:20:27,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:20:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:20:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:20:27,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:27,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 616 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:27,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:27,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:27,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:29,137 INFO L124 PetriNetUnfolderBase]: 11135/15463 cut-off events. [2024-06-04 15:20:29,138 INFO L125 PetriNetUnfolderBase]: For 125273/125279 co-relation queries the response was YES. [2024-06-04 15:20:29,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67765 conditions, 15463 events. 11135/15463 cut-off events. For 125273/125279 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 83590 event pairs, 5731 based on Foata normal form. 10/15448 useless extension candidates. Maximal degree in co-relation 67734. Up to 15072 conditions per place. [2024-06-04 15:20:29,250 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 95 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2024-06-04 15:20:29,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 904 flow [2024-06-04 15:20:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:20:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:20:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 15:20:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-04 15:20:29,251 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 616 flow. Second operand 5 states and 120 transitions. [2024-06-04 15:20:29,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 904 flow [2024-06-04 15:20:29,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 834 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:20:29,317 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 623 flow [2024-06-04 15:20:29,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=623, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-04 15:20:29,318 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-04 15:20:29,318 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 623 flow [2024-06-04 15:20:29,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:29,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:29,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:20:29,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:29,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1308111590, now seen corresponding path program 1 times [2024-06-04 15:20:29,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:29,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900352047] [2024-06-04 15:20:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:30,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:30,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900352047] [2024-06-04 15:20:30,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900352047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:30,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:30,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:30,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499054902] [2024-06-04 15:20:30,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:30,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:30,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 623 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:30,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:30,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:30,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:32,753 INFO L124 PetriNetUnfolderBase]: 11492/15802 cut-off events. [2024-06-04 15:20:32,753 INFO L125 PetriNetUnfolderBase]: For 144564/144564 co-relation queries the response was YES. [2024-06-04 15:20:32,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72283 conditions, 15802 events. 11492/15802 cut-off events. For 144564/144564 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 85223 event pairs, 5470 based on Foata normal form. 6/15804 useless extension candidates. Maximal degree in co-relation 72251. Up to 15432 conditions per place. [2024-06-04 15:20:32,872 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 126 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-06-04 15:20:32,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1131 flow [2024-06-04 15:20:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 15:20:32,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-06-04 15:20:32,874 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 623 flow. Second operand 9 states and 226 transitions. [2024-06-04 15:20:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1131 flow [2024-06-04 15:20:32,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 159 transitions, 1084 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 15:20:32,940 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 704 flow [2024-06-04 15:20:32,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=704, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-06-04 15:20:32,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-04 15:20:32,941 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 704 flow [2024-06-04 15:20:32,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:32,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:32,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:20:32,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:32,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash 829061164, now seen corresponding path program 2 times [2024-06-04 15:20:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:32,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715587054] [2024-06-04 15:20:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:34,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:34,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715587054] [2024-06-04 15:20:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715587054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:34,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967055209] [2024-06-04 15:20:34,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:34,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:34,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:34,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:34,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:34,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 704 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:34,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:34,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:34,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:35,967 INFO L124 PetriNetUnfolderBase]: 11536/15885 cut-off events. [2024-06-04 15:20:35,968 INFO L125 PetriNetUnfolderBase]: For 168890/168896 co-relation queries the response was YES. [2024-06-04 15:20:36,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76426 conditions, 15885 events. 11536/15885 cut-off events. For 168890/168896 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86011 event pairs, 5161 based on Foata normal form. 10/15883 useless extension candidates. Maximal degree in co-relation 76393. Up to 15308 conditions per place. [2024-06-04 15:20:36,088 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 49 changer transitions 0/160 dead transitions. [2024-06-04 15:20:36,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 160 transitions, 1348 flow [2024-06-04 15:20:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 15:20:36,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-04 15:20:36,090 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 704 flow. Second operand 8 states and 207 transitions. [2024-06-04 15:20:36,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 160 transitions, 1348 flow [2024-06-04 15:20:36,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 160 transitions, 1254 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:20:36,157 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 881 flow [2024-06-04 15:20:36,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-04 15:20:36,157 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-04 15:20:36,158 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 881 flow [2024-06-04 15:20:36,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:36,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:36,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:20:36,158 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:36,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1881855706, now seen corresponding path program 3 times [2024-06-04 15:20:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926065944] [2024-06-04 15:20:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926065944] [2024-06-04 15:20:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926065944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:37,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938856487] [2024-06-04 15:20:37,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:37,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:37,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:37,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:37,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:37,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:39,590 INFO L124 PetriNetUnfolderBase]: 11549/15906 cut-off events. [2024-06-04 15:20:39,590 INFO L125 PetriNetUnfolderBase]: For 200820/200820 co-relation queries the response was YES. [2024-06-04 15:20:39,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81101 conditions, 15906 events. 11549/15906 cut-off events. For 200820/200820 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 85766 event pairs, 5364 based on Foata normal form. 6/15908 useless extension candidates. Maximal degree in co-relation 81066. Up to 15520 conditions per place. [2024-06-04 15:20:39,703 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 124 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-04 15:20:39,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1361 flow [2024-06-04 15:20:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 15:20:39,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-04 15:20:39,706 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 881 flow. Second operand 8 states and 195 transitions. [2024-06-04 15:20:39,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1361 flow [2024-06-04 15:20:39,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1274 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 15:20:39,794 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 935 flow [2024-06-04 15:20:39,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-06-04 15:20:39,795 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-04 15:20:39,795 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 935 flow [2024-06-04 15:20:39,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:39,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:39,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:39,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:20:39,795 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:39,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:39,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2032795500, now seen corresponding path program 1 times [2024-06-04 15:20:39,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:39,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104743526] [2024-06-04 15:20:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:39,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104743526] [2024-06-04 15:20:40,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104743526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:40,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:40,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195573323] [2024-06-04 15:20:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:41,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:20:41,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 935 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:20:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:43,002 INFO L124 PetriNetUnfolderBase]: 11914/16353 cut-off events. [2024-06-04 15:20:43,002 INFO L125 PetriNetUnfolderBase]: For 232560/232560 co-relation queries the response was YES. [2024-06-04 15:20:43,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86746 conditions, 16353 events. 11914/16353 cut-off events. For 232560/232560 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86080 event pairs, 5579 based on Foata normal form. 3/16352 useless extension candidates. Maximal degree in co-relation 86709. Up to 16038 conditions per place. [2024-06-04 15:20:43,358 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 125 selfloop transitions, 25 changer transitions 0/155 dead transitions. [2024-06-04 15:20:43,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1432 flow [2024-06-04 15:20:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:20:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:20:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 15:20:43,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-06-04 15:20:43,360 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 935 flow. Second operand 7 states and 165 transitions. [2024-06-04 15:20:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1432 flow [2024-06-04 15:20:43,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 1315 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:43,445 INFO L231 Difference]: Finished difference. Result has 97 places, 123 transitions, 1013 flow [2024-06-04 15:20:43,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1013, PETRI_PLACES=97, PETRI_TRANSITIONS=123} [2024-06-04 15:20:43,445 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-04 15:20:43,446 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 123 transitions, 1013 flow [2024-06-04 15:20:43,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:43,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:43,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:43,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:20:43,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:43,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash -187054564, now seen corresponding path program 1 times [2024-06-04 15:20:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14927990] [2024-06-04 15:20:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:43,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14927990] [2024-06-04 15:20:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14927990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298366794] [2024-06-04 15:20:44,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:44,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:44,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:44,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 123 transitions, 1013 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:44,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:44,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:44,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:47,261 INFO L124 PetriNetUnfolderBase]: 12040/16621 cut-off events. [2024-06-04 15:20:47,261 INFO L125 PetriNetUnfolderBase]: For 270775/270775 co-relation queries the response was YES. [2024-06-04 15:20:47,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91278 conditions, 16621 events. 12040/16621 cut-off events. For 270775/270775 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 90547 event pairs, 4520 based on Foata normal form. 24/16641 useless extension candidates. Maximal degree in co-relation 91240. Up to 15765 conditions per place. [2024-06-04 15:20:47,377 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 163 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-04 15:20:47,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 202 transitions, 1835 flow [2024-06-04 15:20:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:20:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:20:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-04 15:20:47,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980769230769231 [2024-06-04 15:20:47,379 INFO L175 Difference]: Start difference. First operand has 97 places, 123 transitions, 1013 flow. Second operand 10 states and 259 transitions. [2024-06-04 15:20:47,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 202 transitions, 1835 flow [2024-06-04 15:20:47,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 202 transitions, 1755 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:20:47,493 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1118 flow [2024-06-04 15:20:47,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1118, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-04 15:20:47,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-04 15:20:47,494 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1118 flow [2024-06-04 15:20:47,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:47,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:47,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:20:47,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:47,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1404066616, now seen corresponding path program 2 times [2024-06-04 15:20:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940890272] [2024-06-04 15:20:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:48,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940890272] [2024-06-04 15:20:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940890272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277066584] [2024-06-04 15:20:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:48,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:48,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:48,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1118 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:48,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:48,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:48,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:51,499 INFO L124 PetriNetUnfolderBase]: 12248/16955 cut-off events. [2024-06-04 15:20:51,500 INFO L125 PetriNetUnfolderBase]: For 306767/306767 co-relation queries the response was YES. [2024-06-04 15:20:51,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95775 conditions, 16955 events. 12248/16955 cut-off events. For 306767/306767 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 92937 event pairs, 5139 based on Foata normal form. 30/16981 useless extension candidates. Maximal degree in co-relation 95736. Up to 16310 conditions per place. [2024-06-04 15:20:51,627 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 163 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-04 15:20:51,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 202 transitions, 1794 flow [2024-06-04 15:20:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:20:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:20:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-04 15:20:51,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48846153846153845 [2024-06-04 15:20:51,629 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1118 flow. Second operand 10 states and 254 transitions. [2024-06-04 15:20:51,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 202 transitions, 1794 flow [2024-06-04 15:20:51,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 1737 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:51,760 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1221 flow [2024-06-04 15:20:51,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1221, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-04 15:20:51,761 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-04 15:20:51,761 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1221 flow [2024-06-04 15:20:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:51,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:51,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:20:51,762 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:51,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1404181936, now seen corresponding path program 3 times [2024-06-04 15:20:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85620986] [2024-06-04 15:20:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85620986] [2024-06-04 15:20:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85620986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:53,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480693917] [2024-06-04 15:20:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:53,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:20:53,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1221 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:53,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:53,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:20:53,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:55,658 INFO L124 PetriNetUnfolderBase]: 12307/17063 cut-off events. [2024-06-04 15:20:55,658 INFO L125 PetriNetUnfolderBase]: For 331086/331086 co-relation queries the response was YES. [2024-06-04 15:20:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97223 conditions, 17063 events. 12307/17063 cut-off events. For 331086/331086 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 93714 event pairs, 5042 based on Foata normal form. 54/17113 useless extension candidates. Maximal degree in co-relation 97182. Up to 16310 conditions per place. [2024-06-04 15:20:55,817 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 161 selfloop transitions, 26 changer transitions 0/194 dead transitions. [2024-06-04 15:20:55,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 194 transitions, 1837 flow [2024-06-04 15:20:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 15:20:55,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2024-06-04 15:20:55,821 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1221 flow. Second operand 9 states and 227 transitions. [2024-06-04 15:20:55,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 194 transitions, 1837 flow [2024-06-04 15:20:56,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 194 transitions, 1760 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:56,069 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1271 flow [2024-06-04 15:20:56,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1271, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2024-06-04 15:20:56,070 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-04 15:20:56,070 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1271 flow [2024-06-04 15:20:56,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:56,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:56,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:20:56,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:56,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash -68721736, now seen corresponding path program 1 times [2024-06-04 15:20:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:56,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503243835] [2024-06-04 15:20:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503243835] [2024-06-04 15:20:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503243835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:57,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334088457] [2024-06-04 15:20:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:57,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:57,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:20:57,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1271 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:57,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:57,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:20:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:59,729 INFO L124 PetriNetUnfolderBase]: 12708/17569 cut-off events. [2024-06-04 15:20:59,729 INFO L125 PetriNetUnfolderBase]: For 357371/357377 co-relation queries the response was YES. [2024-06-04 15:20:59,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101550 conditions, 17569 events. 12708/17569 cut-off events. For 357371/357377 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94556 event pairs, 5240 based on Foata normal form. 8/17570 useless extension candidates. Maximal degree in co-relation 101508. Up to 17097 conditions per place. [2024-06-04 15:20:59,860 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 147 selfloop transitions, 35 changer transitions 0/187 dead transitions. [2024-06-04 15:20:59,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 187 transitions, 1848 flow [2024-06-04 15:20:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 15:20:59,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-04 15:20:59,861 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1271 flow. Second operand 8 states and 194 transitions. [2024-06-04 15:20:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 187 transitions, 1848 flow [2024-06-04 15:21:00,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1766 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 15:21:00,091 INFO L231 Difference]: Finished difference. Result has 110 places, 142 transitions, 1375 flow [2024-06-04 15:21:00,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1375, PETRI_PLACES=110, PETRI_TRANSITIONS=142} [2024-06-04 15:21:00,092 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-04 15:21:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 142 transitions, 1375 flow [2024-06-04 15:21:00,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:00,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:00,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:00,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:21:00,093 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:00,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash -68906434, now seen corresponding path program 4 times [2024-06-04 15:21:00,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:00,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364885492] [2024-06-04 15:21:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:00,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:01,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:01,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364885492] [2024-06-04 15:21:01,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364885492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:01,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:01,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:01,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182409931] [2024-06-04 15:21:01,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:01,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:01,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:01,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:01,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 142 transitions, 1375 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:01,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:01,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:03,913 INFO L124 PetriNetUnfolderBase]: 12518/17443 cut-off events. [2024-06-04 15:21:03,913 INFO L125 PetriNetUnfolderBase]: For 404944/404944 co-relation queries the response was YES. [2024-06-04 15:21:03,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104821 conditions, 17443 events. 12518/17443 cut-off events. For 404944/404944 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 97142 event pairs, 4703 based on Foata normal form. 42/17470 useless extension candidates. Maximal degree in co-relation 104777. Up to 16476 conditions per place. [2024-06-04 15:21:04,027 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 144 selfloop transitions, 50 changer transitions 0/202 dead transitions. [2024-06-04 15:21:04,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 2013 flow [2024-06-04 15:21:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-04 15:21:04,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-06-04 15:21:04,035 INFO L175 Difference]: Start difference. First operand has 110 places, 142 transitions, 1375 flow. Second operand 9 states and 230 transitions. [2024-06-04 15:21:04,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 2013 flow [2024-06-04 15:21:04,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 202 transitions, 1885 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:04,192 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1428 flow [2024-06-04 15:21:04,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1428, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2024-06-04 15:21:04,193 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-04 15:21:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1428 flow [2024-06-04 15:21:04,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:21:04,195 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:04,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1193971215, now seen corresponding path program 1 times [2024-06-04 15:21:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:04,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173032293] [2024-06-04 15:21:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:04,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:05,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173032293] [2024-06-04 15:21:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173032293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:05,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:21:05,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847494030] [2024-06-04 15:21:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:21:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:21:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:21:05,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:05,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1428 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:05,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:05,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:05,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:07,521 INFO L124 PetriNetUnfolderBase]: 12500/17493 cut-off events. [2024-06-04 15:21:07,521 INFO L125 PetriNetUnfolderBase]: For 444626/444676 co-relation queries the response was YES. [2024-06-04 15:21:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108287 conditions, 17493 events. 12500/17493 cut-off events. For 444626/444676 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96848 event pairs, 5360 based on Foata normal form. 14/17464 useless extension candidates. Maximal degree in co-relation 108242. Up to 16869 conditions per place. [2024-06-04 15:21:07,682 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 147 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-06-04 15:21:07,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 2062 flow [2024-06-04 15:21:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:21:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:21:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 15:21:07,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-04 15:21:07,684 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1428 flow. Second operand 6 states and 151 transitions. [2024-06-04 15:21:07,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 2062 flow [2024-06-04 15:21:07,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 184 transitions, 1941 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:21:07,978 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1527 flow [2024-06-04 15:21:07,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1527, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-04 15:21:07,979 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-04 15:21:07,979 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1527 flow [2024-06-04 15:21:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:07,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:07,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:21:07,979 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:07,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1407550826, now seen corresponding path program 2 times [2024-06-04 15:21:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:07,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944201116] [2024-06-04 15:21:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:07,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944201116] [2024-06-04 15:21:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944201116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:09,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051933987] [2024-06-04 15:21:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:09,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:09,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1527 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:09,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:09,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:09,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:12,046 INFO L124 PetriNetUnfolderBase]: 13090/18115 cut-off events. [2024-06-04 15:21:12,046 INFO L125 PetriNetUnfolderBase]: For 474226/474226 co-relation queries the response was YES. [2024-06-04 15:21:12,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115057 conditions, 18115 events. 13090/18115 cut-off events. For 474226/474226 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 97789 event pairs, 5315 based on Foata normal form. 6/18117 useless extension candidates. Maximal degree in co-relation 115010. Up to 17729 conditions per place. [2024-06-04 15:21:12,186 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 23 changer transitions 0/199 dead transitions. [2024-06-04 15:21:12,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 199 transitions, 2097 flow [2024-06-04 15:21:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:21:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:21:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 15:21:12,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-04 15:21:12,188 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1527 flow. Second operand 8 states and 186 transitions. [2024-06-04 15:21:12,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 199 transitions, 2097 flow [2024-06-04 15:21:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 2045 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-04 15:21:12,454 INFO L231 Difference]: Finished difference. Result has 121 places, 159 transitions, 1617 flow [2024-06-04 15:21:12,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1617, PETRI_PLACES=121, PETRI_TRANSITIONS=159} [2024-06-04 15:21:12,455 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-04 15:21:12,455 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 159 transitions, 1617 flow [2024-06-04 15:21:12,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:12,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:12,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:21:12,456 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:12,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1637766746, now seen corresponding path program 3 times [2024-06-04 15:21:12,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:12,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643776701] [2024-06-04 15:21:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:12,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:13,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643776701] [2024-06-04 15:21:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643776701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:13,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:13,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362064336] [2024-06-04 15:21:13,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:13,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:13,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 159 transitions, 1617 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:13,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:13,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:13,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:16,461 INFO L124 PetriNetUnfolderBase]: 13126/18167 cut-off events. [2024-06-04 15:21:16,461 INFO L125 PetriNetUnfolderBase]: For 518513/518513 co-relation queries the response was YES. [2024-06-04 15:21:16,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118418 conditions, 18167 events. 13126/18167 cut-off events. For 518513/518513 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 98233 event pairs, 5464 based on Foata normal form. 6/18169 useless extension candidates. Maximal degree in co-relation 118368. Up to 17804 conditions per place. [2024-06-04 15:21:16,590 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 176 selfloop transitions, 21 changer transitions 0/202 dead transitions. [2024-06-04 15:21:16,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 202 transitions, 2201 flow [2024-06-04 15:21:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:21:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:21:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 15:21:16,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-04 15:21:16,592 INFO L175 Difference]: Start difference. First operand has 121 places, 159 transitions, 1617 flow. Second operand 8 states and 186 transitions. [2024-06-04 15:21:16,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 202 transitions, 2201 flow [2024-06-04 15:21:16,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2085 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:21:16,910 INFO L231 Difference]: Finished difference. Result has 123 places, 162 transitions, 1645 flow [2024-06-04 15:21:16,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1645, PETRI_PLACES=123, PETRI_TRANSITIONS=162} [2024-06-04 15:21:16,911 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-04 15:21:16,911 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 162 transitions, 1645 flow [2024-06-04 15:21:16,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:16,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:16,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:16,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:21:16,911 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:16,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 96732700, now seen corresponding path program 5 times [2024-06-04 15:21:16,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:16,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063228966] [2024-06-04 15:21:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:16,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:18,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063228966] [2024-06-04 15:21:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063228966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:18,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783756708] [2024-06-04 15:21:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:18,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:18,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 162 transitions, 1645 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:18,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:18,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:18,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:20,929 INFO L124 PetriNetUnfolderBase]: 12718/17685 cut-off events. [2024-06-04 15:21:20,930 INFO L125 PetriNetUnfolderBase]: For 572759/572759 co-relation queries the response was YES. [2024-06-04 15:21:20,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118866 conditions, 17685 events. 12718/17685 cut-off events. For 572759/572759 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 98088 event pairs, 5186 based on Foata normal form. 39/17720 useless extension candidates. Maximal degree in co-relation 118815. Up to 16831 conditions per place. [2024-06-04 15:21:21,086 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 170 selfloop transitions, 46 changer transitions 0/224 dead transitions. [2024-06-04 15:21:21,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 224 transitions, 2571 flow [2024-06-04 15:21:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-04 15:21:21,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-04 15:21:21,088 INFO L175 Difference]: Start difference. First operand has 123 places, 162 transitions, 1645 flow. Second operand 9 states and 228 transitions. [2024-06-04 15:21:21,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 224 transitions, 2571 flow [2024-06-04 15:21:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 224 transitions, 2455 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:21,371 INFO L231 Difference]: Finished difference. Result has 128 places, 168 transitions, 1843 flow [2024-06-04 15:21:21,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=128, PETRI_TRANSITIONS=168} [2024-06-04 15:21:21,371 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-04 15:21:21,371 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 168 transitions, 1843 flow [2024-06-04 15:21:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:21,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:21,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:21:21,372 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:21,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1407847496, now seen corresponding path program 4 times [2024-06-04 15:21:21,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:21,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600790935] [2024-06-04 15:21:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:22,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:22,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600790935] [2024-06-04 15:21:22,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600790935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:22,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:22,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:22,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892147572] [2024-06-04 15:21:22,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:22,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:22,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 168 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:22,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:22,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:22,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:25,841 INFO L124 PetriNetUnfolderBase]: 13236/18309 cut-off events. [2024-06-04 15:21:25,842 INFO L125 PetriNetUnfolderBase]: For 655994/655994 co-relation queries the response was YES. [2024-06-04 15:21:25,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127551 conditions, 18309 events. 13236/18309 cut-off events. For 655994/655994 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 99018 event pairs, 5462 based on Foata normal form. 6/18311 useless extension candidates. Maximal degree in co-relation 127498. Up to 17924 conditions per place. [2024-06-04 15:21:25,997 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 175 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-04 15:21:25,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2455 flow [2024-06-04 15:21:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:21:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:21:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 15:21:25,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-04 15:21:25,999 INFO L175 Difference]: Start difference. First operand has 128 places, 168 transitions, 1843 flow. Second operand 8 states and 187 transitions. [2024-06-04 15:21:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2455 flow [2024-06-04 15:21:26,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2254 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:26,640 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 1820 flow [2024-06-04 15:21:26,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1820, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2024-06-04 15:21:26,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-04 15:21:26,642 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 1820 flow [2024-06-04 15:21:26,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:26,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:26,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:26,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:21:26,642 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:26,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1002743818, now seen corresponding path program 5 times [2024-06-04 15:21:26,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043250172] [2024-06-04 15:21:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043250172] [2024-06-04 15:21:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043250172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:27,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:27,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:27,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967194437] [2024-06-04 15:21:27,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:27,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:28,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:28,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 1820 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:28,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:28,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:28,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:31,186 INFO L124 PetriNetUnfolderBase]: 13221/18288 cut-off events. [2024-06-04 15:21:31,187 INFO L125 PetriNetUnfolderBase]: For 686964/686964 co-relation queries the response was YES. [2024-06-04 15:21:31,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128892 conditions, 18288 events. 13221/18288 cut-off events. For 686964/686964 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 98866 event pairs, 5443 based on Foata normal form. 6/18290 useless extension candidates. Maximal degree in co-relation 128837. Up to 17918 conditions per place. [2024-06-04 15:21:31,355 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 186 selfloop transitions, 28 changer transitions 0/219 dead transitions. [2024-06-04 15:21:31,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 219 transitions, 2496 flow [2024-06-04 15:21:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:21:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:21:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 15:21:31,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-04 15:21:31,357 INFO L175 Difference]: Start difference. First operand has 131 places, 171 transitions, 1820 flow. Second operand 8 states and 189 transitions. [2024-06-04 15:21:31,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 219 transitions, 2496 flow [2024-06-04 15:21:31,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 2340 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 15:21:31,793 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1888 flow [2024-06-04 15:21:31,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1888, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-04 15:21:31,794 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-04 15:21:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1888 flow [2024-06-04 15:21:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:31,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:31,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:21:31,795 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:21:31,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1407847744, now seen corresponding path program 1 times [2024-06-04 15:21:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:31,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601679325] [2024-06-04 15:21:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:32,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601679325] [2024-06-04 15:21:32,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601679325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:32,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43386940] [2024-06-04 15:21:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:33,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:33,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1888 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:33,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:33,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:33,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand