./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_power.opt-thin001_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe007_power.opt-thin001_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe007_power.opt-thin001_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe007_power.opt-thin001_power.opt.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-eb4cb34-m [2024-06-21 21:35:40,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:35:40,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:35:40,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:35:40,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:35:40,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:35:40,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:35:40,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:35:40,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:35:40,439 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:35:40,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:35:40,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:35:40,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:35:40,441 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:35:40,441 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:35:40,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:35:40,442 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:35:40,442 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:35:40,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:35:40,443 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:35:40,443 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:35:40,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:35:40,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:35:40,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:35:40,444 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:35:40,444 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:35:40,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:35:40,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:35:40,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:35:40,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:35:40,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:35:40,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:35:40,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:35:40,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:35:40,448 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:35:40,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:35:40,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:35:40,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:35:40,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:35:40,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:35:40,449 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:35:40,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:35:40,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:35:40,449 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:35:40,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:35:40,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:35:40,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:35:40,730 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:35:40,731 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:35:40,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe007_power.opt-thin001_power.opt.yml/witness.yml [2024-06-21 21:35:40,940 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:35:40,940 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:35:40,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_power.opt-thin001_power.opt.i [2024-06-21 21:35:42,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:35:42,444 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:35:42,444 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_power.opt-thin001_power.opt.i [2024-06-21 21:35:42,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8967ebc9f/4b11559733ba4fc99f811ffac72c0426/FLAG467fcaba2 [2024-06-21 21:35:42,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8967ebc9f/4b11559733ba4fc99f811ffac72c0426 [2024-06-21 21:35:42,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:35:42,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:35:42,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:35:42,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:35:42,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:35:42,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:35:40" (1/2) ... [2024-06-21 21:35:42,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca6e68e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:35:42, skipping insertion in model container [2024-06-21 21:35:42,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:35:40" (1/2) ... [2024-06-21 21:35:42,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bf6da86 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:35:42, skipping insertion in model container [2024-06-21 21:35:42,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:35:42" (2/2) ... [2024-06-21 21:35:42,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca6e68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:42, skipping insertion in model container [2024-06-21 21:35:42,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:35:42" (2/2) ... [2024-06-21 21:35:42,496 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:35:42,618 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:35:42,620 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-21 21:35:42,620 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-21 21:35:42,620 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-21 21:35:42,621 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:35:42,621 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-21 21:35:42,669 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:35:43,063 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:35:43,074 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:35:43,291 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:35:43,339 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:35:43,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43 WrapperNode [2024-06-21 21:35:43,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:35:43,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:35:43,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:35:43,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:35:43,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,403 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 255 [2024-06-21 21:35:43,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:35:43,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:35:43,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:35:43,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:35:43,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,419 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,440 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 21:35:43,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:35:43,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:35:43,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:35:43,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:35:43,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (1/1) ... [2024-06-21 21:35:43,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:35:43,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:35:43,501 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) [2024-06-21 21:35:43,544 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 [2024-06-21 21:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:35:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:35:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:35:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:35:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:35:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:35:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:35:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:35:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:35:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:35:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:35:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:35:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:35:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:35:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:35:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:35:43,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:35:43,568 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:35:43,760 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:35:43,762 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:35:44,268 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:35:44,268 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:35:44,739 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:35:44,739 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:35:44,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:35:44 BoogieIcfgContainer [2024-06-21 21:35:44,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:35:44,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:35:44,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:35:44,746 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:35:44,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:35:40" (1/4) ... [2024-06-21 21:35:44,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712a862 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:35:44, skipping insertion in model container [2024-06-21 21:35:44,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:35:42" (2/4) ... [2024-06-21 21:35:44,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:35:44, skipping insertion in model container [2024-06-21 21:35:44,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:35:43" (3/4) ... [2024-06-21 21:35:44,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:35:44, skipping insertion in model container [2024-06-21 21:35:44,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:35:44" (4/4) ... [2024-06-21 21:35:44,749 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_power.opt-thin001_power.opt.i [2024-06-21 21:35:44,767 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:35:44,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:35:44,767 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:35:44,849 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:35:44,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:35:44,926 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:35:44,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:35:44,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:35:44,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:35:44,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:35:44,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:35:44,953 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;@1723395, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:35:44,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:35:44,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:35:44,959 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:35:44,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:35:44,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:44,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:35:44,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:44,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 809368729, now seen corresponding path program 1 times [2024-06-21 21:35:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661036183] [2024-06-21 21:35:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661036183] [2024-06-21 21:35:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661036183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:47,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:47,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:35:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324666064] [2024-06-21 21:35:47,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:47,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:35:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:35:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:35:47,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:35:47,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:47,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:47,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:35:47,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:47,641 INFO L124 PetriNetUnfolderBase]: 903/1397 cut-off events. [2024-06-21 21:35:47,641 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 21:35:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1397 events. 903/1397 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6526 event pairs, 574 based on Foata normal form. 1/1374 useless extension candidates. Maximal degree in co-relation 2821. Up to 1371 conditions per place. [2024-06-21 21:35:47,656 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 21:35:47,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 21:35:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:35:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:35:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 21:35:47,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 21:35:47,670 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 21:35:47,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 21:35:47,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:47,676 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:35:47,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:35:47,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:35:47,682 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:35:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:47,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:47,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:35:47,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:47,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -40909947, now seen corresponding path program 1 times [2024-06-21 21:35:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:47,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652545432] [2024-06-21 21:35:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652545432] [2024-06-21 21:35:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652545432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:49,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:35:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397730681] [2024-06-21 21:35:49,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:35:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:35:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:35:49,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:49,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:49,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:49,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:49,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:50,416 INFO L124 PetriNetUnfolderBase]: 1390/2109 cut-off events. [2024-06-21 21:35:50,416 INFO L125 PetriNetUnfolderBase]: For 367/369 co-relation queries the response was YES. [2024-06-21 21:35:50,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 2109 events. 1390/2109 cut-off events. For 367/369 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9744 event pairs, 627 based on Foata normal form. 5/2114 useless extension candidates. Maximal degree in co-relation 4839. Up to 2045 conditions per place. [2024-06-21 21:35:50,432 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-21 21:35:50,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 280 flow [2024-06-21 21:35:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:35:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:35:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-21 21:35:50,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 21:35:50,437 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-21 21:35:50,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 280 flow [2024-06-21 21:35:50,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:35:50,441 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-21 21:35:50,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-21 21:35:50,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-21 21:35:50,445 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-21 21:35:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:50,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:35:50,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -356123518, now seen corresponding path program 1 times [2024-06-21 21:35:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498945550] [2024-06-21 21:35:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:52,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498945550] [2024-06-21 21:35:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498945550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:35:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409820753] [2024-06-21 21:35:52,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:52,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:35:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:35:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:35:52,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:52,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:52,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:52,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:52,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:53,356 INFO L124 PetriNetUnfolderBase]: 1381/2094 cut-off events. [2024-06-21 21:35:53,357 INFO L125 PetriNetUnfolderBase]: For 1029/1037 co-relation queries the response was YES. [2024-06-21 21:35:53,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5364 conditions, 2094 events. 1381/2094 cut-off events. For 1029/1037 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9672 event pairs, 458 based on Foata normal form. 14/2108 useless extension candidates. Maximal degree in co-relation 5349. Up to 1992 conditions per place. [2024-06-21 21:35:53,369 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2024-06-21 21:35:53,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 344 flow [2024-06-21 21:35:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:35:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:35:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-21 21:35:53,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-21 21:35:53,372 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 103 transitions. [2024-06-21 21:35:53,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 344 flow [2024-06-21 21:35:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 21:35:53,375 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 185 flow [2024-06-21 21:35:53,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-21 21:35:53,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 21:35:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 185 flow [2024-06-21 21:35:53,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:53,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:35:53,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -978759166, now seen corresponding path program 1 times [2024-06-21 21:35:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493196921] [2024-06-21 21:35:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493196921] [2024-06-21 21:35:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493196921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:55,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:55,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:35:55,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003275296] [2024-06-21 21:35:55,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:55,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:35:55,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:35:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:35:55,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:55,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:55,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:55,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:55,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:56,323 INFO L124 PetriNetUnfolderBase]: 1075/1648 cut-off events. [2024-06-21 21:35:56,323 INFO L125 PetriNetUnfolderBase]: For 1591/1593 co-relation queries the response was YES. [2024-06-21 21:35:56,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 1648 events. 1075/1648 cut-off events. For 1591/1593 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7756 event pairs, 487 based on Foata normal form. 4/1651 useless extension candidates. Maximal degree in co-relation 4615. Up to 1600 conditions per place. [2024-06-21 21:35:56,334 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-21 21:35:56,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 343 flow [2024-06-21 21:35:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:35:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:35:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 21:35:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:35:56,337 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 185 flow. Second operand 5 states and 90 transitions. [2024-06-21 21:35:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 343 flow [2024-06-21 21:35:56,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 322 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:56,343 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-21 21:35:56,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 21:35:56,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-21 21:35:56,345 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-21 21:35:56,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:56,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:56,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:35:56,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:56,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -240118320, now seen corresponding path program 1 times [2024-06-21 21:35:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:56,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224385320] [2024-06-21 21:35:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:56,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224385320] [2024-06-21 21:35:59,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224385320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:59,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:59,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:59,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207477878] [2024-06-21 21:35:59,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:59,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:59,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:59,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:59,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:59,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:59,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:59,834 INFO L124 PetriNetUnfolderBase]: 1070/1641 cut-off events. [2024-06-21 21:35:59,834 INFO L125 PetriNetUnfolderBase]: For 2390/2394 co-relation queries the response was YES. [2024-06-21 21:35:59,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 1641 events. 1070/1641 cut-off events. For 2390/2394 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7729 event pairs, 469 based on Foata normal form. 6/1646 useless extension candidates. Maximal degree in co-relation 4985. Up to 1582 conditions per place. [2024-06-21 21:35:59,847 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-21 21:35:59,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 402 flow [2024-06-21 21:35:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:35:59,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:35:59,858 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:35:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 402 flow [2024-06-21 21:35:59,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:59,864 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 246 flow [2024-06-21 21:35:59,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 21:35:59,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 21:35:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 246 flow [2024-06-21 21:35:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:59,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:59,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:35:59,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:59,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 198504533, now seen corresponding path program 1 times [2024-06-21 21:35:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:59,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775956553] [2024-06-21 21:35:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:01,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775956553] [2024-06-21 21:36:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775956553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:36:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101949097] [2024-06-21 21:36:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:01,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:36:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:36:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:36:01,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:01,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:01,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:01,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:01,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:02,969 INFO L124 PetriNetUnfolderBase]: 1374/2093 cut-off events. [2024-06-21 21:36:02,969 INFO L125 PetriNetUnfolderBase]: For 4094/4116 co-relation queries the response was YES. [2024-06-21 21:36:02,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6717 conditions, 2093 events. 1374/2093 cut-off events. For 4094/4116 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9739 event pairs, 514 based on Foata normal form. 20/2113 useless extension candidates. Maximal degree in co-relation 6695. Up to 1969 conditions per place. [2024-06-21 21:36:02,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-21 21:36:02,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 522 flow [2024-06-21 21:36:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:36:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:36:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 21:36:02,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 21:36:02,986 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 246 flow. Second operand 6 states and 109 transitions. [2024-06-21 21:36:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 522 flow [2024-06-21 21:36:02,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 488 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:02,992 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 298 flow [2024-06-21 21:36:02,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 21:36:02,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 21:36:02,996 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 298 flow [2024-06-21 21:36:02,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:02,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:02,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:36:02,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:02,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash 235555733, now seen corresponding path program 2 times [2024-06-21 21:36:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:03,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767191979] [2024-06-21 21:36:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767191979] [2024-06-21 21:36:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767191979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:04,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:36:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844077912] [2024-06-21 21:36:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:36:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:36:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:36:04,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:04,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:04,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:04,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:04,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:05,909 INFO L124 PetriNetUnfolderBase]: 1369/2086 cut-off events. [2024-06-21 21:36:05,909 INFO L125 PetriNetUnfolderBase]: For 5627/5651 co-relation queries the response was YES. [2024-06-21 21:36:05,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7138 conditions, 2086 events. 1369/2086 cut-off events. For 5627/5651 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9689 event pairs, 514 based on Foata normal form. 23/2109 useless extension candidates. Maximal degree in co-relation 7115. Up to 1975 conditions per place. [2024-06-21 21:36:05,926 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 21:36:05,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 484 flow [2024-06-21 21:36:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:36:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:36:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 21:36:05,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 21:36:05,929 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 298 flow. Second operand 5 states and 92 transitions. [2024-06-21 21:36:05,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 484 flow [2024-06-21 21:36:05,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 452 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 21:36:05,936 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 304 flow [2024-06-21 21:36:05,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 21:36:05,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 21:36:05,937 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 304 flow [2024-06-21 21:36:05,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:05,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:05,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:36:05,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:05,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1146268527, now seen corresponding path program 1 times [2024-06-21 21:36:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845627420] [2024-06-21 21:36:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:09,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:09,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845627420] [2024-06-21 21:36:09,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845627420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:09,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:09,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:09,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847507622] [2024-06-21 21:36:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:09,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:09,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 304 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-21 21:36:09,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:09,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:09,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:10,163 INFO L124 PetriNetUnfolderBase]: 1070/1647 cut-off events. [2024-06-21 21:36:10,163 INFO L125 PetriNetUnfolderBase]: For 5806/5810 co-relation queries the response was YES. [2024-06-21 21:36:10,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 1647 events. 1070/1647 cut-off events. For 5806/5810 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7802 event pairs, 432 based on Foata normal form. 8/1654 useless extension candidates. Maximal degree in co-relation 5983. Up to 1560 conditions per place. [2024-06-21 21:36:10,183 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 62 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2024-06-21 21:36:10,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 540 flow [2024-06-21 21:36:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:36:10,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:36:10,186 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 304 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:36:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 540 flow [2024-06-21 21:36:10,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 514 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:10,192 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 341 flow [2024-06-21 21:36:10,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-21 21:36:10,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 21:36:10,194 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 341 flow [2024-06-21 21:36:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-21 21:36:10,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:10,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:10,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:36:10,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:10,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -739520470, now seen corresponding path program 1 times [2024-06-21 21:36:10,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:10,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061171042] [2024-06-21 21:36:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:12,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061171042] [2024-06-21 21:36:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061171042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:12,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684050208] [2024-06-21 21:36:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:12,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:12,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:12,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 341 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:12,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:12,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:12,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:13,387 INFO L124 PetriNetUnfolderBase]: 1366/2087 cut-off events. [2024-06-21 21:36:13,387 INFO L125 PetriNetUnfolderBase]: For 8479/8502 co-relation queries the response was YES. [2024-06-21 21:36:13,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7691 conditions, 2087 events. 1366/2087 cut-off events. For 8479/8502 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9667 event pairs, 488 based on Foata normal form. 23/2110 useless extension candidates. Maximal degree in co-relation 7665. Up to 1948 conditions per place. [2024-06-21 21:36:13,400 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 21:36:13,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 607 flow [2024-06-21 21:36:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:36:13,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:36:13,403 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 341 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:36:13,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 607 flow [2024-06-21 21:36:13,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 562 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:13,410 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 374 flow [2024-06-21 21:36:13,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=374, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-21 21:36:13,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:36:13,412 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 374 flow [2024-06-21 21:36:13,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:13,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:13,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:36:13,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:13,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1287699496, now seen corresponding path program 2 times [2024-06-21 21:36:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:13,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824461160] [2024-06-21 21:36:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824461160] [2024-06-21 21:36:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824461160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:15,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:15,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598648443] [2024-06-21 21:36:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:15,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:15,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:15,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:15,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 374 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:15,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:15,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:15,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:16,835 INFO L124 PetriNetUnfolderBase]: 1460/2231 cut-off events. [2024-06-21 21:36:16,835 INFO L125 PetriNetUnfolderBase]: For 10841/10845 co-relation queries the response was YES. [2024-06-21 21:36:16,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8725 conditions, 2231 events. 1460/2231 cut-off events. For 10841/10845 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10335 event pairs, 468 based on Foata normal form. 6/2237 useless extension candidates. Maximal degree in co-relation 8698. Up to 2071 conditions per place. [2024-06-21 21:36:16,849 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 95 selfloop transitions, 34 changer transitions 0/133 dead transitions. [2024-06-21 21:36:16,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 133 transitions, 1003 flow [2024-06-21 21:36:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:36:16,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 21:36:16,851 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 374 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:36:16,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 133 transitions, 1003 flow [2024-06-21 21:36:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 921 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:16,861 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 647 flow [2024-06-21 21:36:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=647, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-21 21:36:16,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 21:36:16,862 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 647 flow [2024-06-21 21:36:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:16,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:16,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:36:16,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:16,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1166953578, now seen corresponding path program 3 times [2024-06-21 21:36:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429838786] [2024-06-21 21:36:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:19,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429838786] [2024-06-21 21:36:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429838786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:19,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130760190] [2024-06-21 21:36:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:19,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:19,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:19,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:19,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:19,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:19,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:19,908 INFO L124 PetriNetUnfolderBase]: 1468/2253 cut-off events. [2024-06-21 21:36:19,908 INFO L125 PetriNetUnfolderBase]: For 13953/13994 co-relation queries the response was YES. [2024-06-21 21:36:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9553 conditions, 2253 events. 1468/2253 cut-off events. For 13953/13994 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10569 event pairs, 489 based on Foata normal form. 40/2293 useless extension candidates. Maximal degree in co-relation 9520. Up to 2054 conditions per place. [2024-06-21 21:36:19,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 33 changer transitions 0/113 dead transitions. [2024-06-21 21:36:19,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 969 flow [2024-06-21 21:36:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:36:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:36:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 21:36:19,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 21:36:19,928 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 647 flow. Second operand 6 states and 107 transitions. [2024-06-21 21:36:19,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 969 flow [2024-06-21 21:36:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 894 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 21:36:19,947 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 694 flow [2024-06-21 21:36:19,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-21 21:36:19,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 21:36:19,948 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 694 flow [2024-06-21 21:36:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:19,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:19,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:19,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:36:19,949 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:19,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash -553284456, now seen corresponding path program 4 times [2024-06-21 21:36:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123973696] [2024-06-21 21:36:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:22,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:22,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123973696] [2024-06-21 21:36:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123973696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:22,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:22,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206175285] [2024-06-21 21:36:22,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:22,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:22,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:22,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:22,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:23,042 INFO L124 PetriNetUnfolderBase]: 1463/2246 cut-off events. [2024-06-21 21:36:23,043 INFO L125 PetriNetUnfolderBase]: For 16596/16632 co-relation queries the response was YES. [2024-06-21 21:36:23,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10004 conditions, 2246 events. 1463/2246 cut-off events. For 16596/16632 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10581 event pairs, 489 based on Foata normal form. 35/2281 useless extension candidates. Maximal degree in co-relation 9969. Up to 1982 conditions per place. [2024-06-21 21:36:23,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 45 changer transitions 0/122 dead transitions. [2024-06-21 21:36:23,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 1058 flow [2024-06-21 21:36:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:36:23,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:36:23,062 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 694 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:36:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 1058 flow [2024-06-21 21:36:23,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 970 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:23,082 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 758 flow [2024-06-21 21:36:23,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=758, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-21 21:36:23,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 21:36:23,083 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 758 flow [2024-06-21 21:36:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:23,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:23,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:36:23,084 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:23,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -32729889, now seen corresponding path program 1 times [2024-06-21 21:36:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831642763] [2024-06-21 21:36:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:25,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831642763] [2024-06-21 21:36:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831642763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:25,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:25,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:36:25,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859879897] [2024-06-21 21:36:25,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:25,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:36:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:36:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:36:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:36:25,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 758 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:25,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:25,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:36:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:26,135 INFO L124 PetriNetUnfolderBase]: 1245/1991 cut-off events. [2024-06-21 21:36:26,135 INFO L125 PetriNetUnfolderBase]: For 19255/19263 co-relation queries the response was YES. [2024-06-21 21:36:26,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9543 conditions, 1991 events. 1245/1991 cut-off events. For 19255/19263 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9388 event pairs, 453 based on Foata normal form. 10/1979 useless extension candidates. Maximal degree in co-relation 9507. Up to 1864 conditions per place. [2024-06-21 21:36:26,152 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 74 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-21 21:36:26,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 994 flow [2024-06-21 21:36:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:36:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:36:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:36:26,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 21:36:26,154 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 758 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:36:26,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 994 flow [2024-06-21 21:36:26,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 872 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:26,174 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 714 flow [2024-06-21 21:36:26,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-21 21:36:26,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 21:36:26,175 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 714 flow [2024-06-21 21:36:26,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:26,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:26,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:26,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:36:26,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:26,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:26,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1768497344, now seen corresponding path program 1 times [2024-06-21 21:36:26,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616152582] [2024-06-21 21:36:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:26,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:28,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616152582] [2024-06-21 21:36:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616152582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:28,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548671280] [2024-06-21 21:36:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:28,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:28,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 714 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:28,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:28,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:29,386 INFO L124 PetriNetUnfolderBase]: 1471/2262 cut-off events. [2024-06-21 21:36:29,386 INFO L125 PetriNetUnfolderBase]: For 19249/19286 co-relation queries the response was YES. [2024-06-21 21:36:29,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2262 events. 1471/2262 cut-off events. For 19249/19286 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10676 event pairs, 321 based on Foata normal form. 37/2299 useless extension candidates. Maximal degree in co-relation 10557. Up to 1968 conditions per place. [2024-06-21 21:36:29,403 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-21 21:36:29,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1168 flow [2024-06-21 21:36:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:36:29,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:36:29,405 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 714 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:36:29,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1168 flow [2024-06-21 21:36:29,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 1124 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:29,426 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 815 flow [2024-06-21 21:36:29,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-21 21:36:29,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 21:36:29,427 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 815 flow [2024-06-21 21:36:29,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:29,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:29,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:36:29,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:29,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1218589900, now seen corresponding path program 2 times [2024-06-21 21:36:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:29,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923726448] [2024-06-21 21:36:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:31,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:31,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923726448] [2024-06-21 21:36:31,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923726448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:31,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:31,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:31,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578345046] [2024-06-21 21:36:31,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:31,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:31,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:31,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:31,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:31,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:31,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:31,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:32,919 INFO L124 PetriNetUnfolderBase]: 1491/2294 cut-off events. [2024-06-21 21:36:32,920 INFO L125 PetriNetUnfolderBase]: For 22236/22273 co-relation queries the response was YES. [2024-06-21 21:36:32,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11132 conditions, 2294 events. 1491/2294 cut-off events. For 22236/22273 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10893 event pairs, 449 based on Foata normal form. 37/2331 useless extension candidates. Maximal degree in co-relation 11095. Up to 2084 conditions per place. [2024-06-21 21:36:32,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 95 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-21 21:36:32,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1187 flow [2024-06-21 21:36:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:36:32,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:36:32,938 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 815 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:36:32,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1187 flow [2024-06-21 21:36:32,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 1112 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:32,966 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 851 flow [2024-06-21 21:36:32,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2024-06-21 21:36:32,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 21:36:32,967 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 851 flow [2024-06-21 21:36:32,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:32,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:32,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:36:32,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:32,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1218584940, now seen corresponding path program 1 times [2024-06-21 21:36:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522282066] [2024-06-21 21:36:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:35,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:35,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522282066] [2024-06-21 21:36:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522282066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:35,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404463067] [2024-06-21 21:36:35,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:35,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:35,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 851 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:35,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:35,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:35,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:36,550 INFO L124 PetriNetUnfolderBase]: 1504/2319 cut-off events. [2024-06-21 21:36:36,550 INFO L125 PetriNetUnfolderBase]: For 24560/24597 co-relation queries the response was YES. [2024-06-21 21:36:36,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11441 conditions, 2319 events. 1504/2319 cut-off events. For 24560/24597 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11038 event pairs, 431 based on Foata normal form. 35/2354 useless extension candidates. Maximal degree in co-relation 11402. Up to 2103 conditions per place. [2024-06-21 21:36:36,565 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 98 selfloop transitions, 36 changer transitions 0/138 dead transitions. [2024-06-21 21:36:36,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1257 flow [2024-06-21 21:36:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:36:36,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:36:36,568 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 851 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:36:36,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1257 flow [2024-06-21 21:36:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 1174 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:36,597 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 898 flow [2024-06-21 21:36:36,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-21 21:36:36,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:36:36,598 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 898 flow [2024-06-21 21:36:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:36,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:36,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:36:36,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:36,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 27874932, now seen corresponding path program 3 times [2024-06-21 21:36:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:36,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132842999] [2024-06-21 21:36:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:38,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:38,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132842999] [2024-06-21 21:36:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132842999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:38,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109867691] [2024-06-21 21:36:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:38,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:38,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 898 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:38,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:38,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:38,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:39,956 INFO L124 PetriNetUnfolderBase]: 1496/2307 cut-off events. [2024-06-21 21:36:39,956 INFO L125 PetriNetUnfolderBase]: For 27314/27351 co-relation queries the response was YES. [2024-06-21 21:36:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11712 conditions, 2307 events. 1496/2307 cut-off events. For 27314/27351 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10930 event pairs, 301 based on Foata normal form. 37/2344 useless extension candidates. Maximal degree in co-relation 11672. Up to 2058 conditions per place. [2024-06-21 21:36:39,968 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-21 21:36:39,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 129 transitions, 1216 flow [2024-06-21 21:36:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:36:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:36:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 21:36:39,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:36:39,970 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 898 flow. Second operand 6 states and 108 transitions. [2024-06-21 21:36:39,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 129 transitions, 1216 flow [2024-06-21 21:36:39,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 1090 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:39,995 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 845 flow [2024-06-21 21:36:39,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=845, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-21 21:36:39,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:36:39,996 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 845 flow [2024-06-21 21:36:39,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:39,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:39,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:39,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:36:39,996 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:39,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash 28059382, now seen corresponding path program 2 times [2024-06-21 21:36:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:39,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105769511] [2024-06-21 21:36:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:42,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:42,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105769511] [2024-06-21 21:36:42,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105769511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:42,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:42,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140401147] [2024-06-21 21:36:42,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:42,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:42,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:42,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 845 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:42,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:42,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:43,580 INFO L124 PetriNetUnfolderBase]: 1509/2326 cut-off events. [2024-06-21 21:36:43,580 INFO L125 PetriNetUnfolderBase]: For 29979/30016 co-relation queries the response was YES. [2024-06-21 21:36:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11908 conditions, 2326 events. 1509/2326 cut-off events. For 29979/30016 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11099 event pairs, 429 based on Foata normal form. 35/2361 useless extension candidates. Maximal degree in co-relation 11867. Up to 1980 conditions per place. [2024-06-21 21:36:43,592 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 52 changer transitions 0/148 dead transitions. [2024-06-21 21:36:43,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 148 transitions, 1401 flow [2024-06-21 21:36:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:36:43,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:36:43,596 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 845 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:36:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 148 transitions, 1401 flow [2024-06-21 21:36:43,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1332 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:43,621 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 994 flow [2024-06-21 21:36:43,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-21 21:36:43,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 21:36:43,622 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 994 flow [2024-06-21 21:36:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:43,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:43,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:36:43,623 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:43,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 27879892, now seen corresponding path program 3 times [2024-06-21 21:36:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:43,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614983066] [2024-06-21 21:36:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:46,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:46,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614983066] [2024-06-21 21:36:46,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614983066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:46,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:46,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149827719] [2024-06-21 21:36:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:46,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:46,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:46,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:46,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 994 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:46,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:46,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:46,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:47,315 INFO L124 PetriNetUnfolderBase]: 1522/2345 cut-off events. [2024-06-21 21:36:47,316 INFO L125 PetriNetUnfolderBase]: For 34080/34109 co-relation queries the response was YES. [2024-06-21 21:36:47,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12534 conditions, 2345 events. 1522/2345 cut-off events. For 34080/34109 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11191 event pairs, 429 based on Foata normal form. 30/2375 useless extension candidates. Maximal degree in co-relation 12492. Up to 2123 conditions per place. [2024-06-21 21:36:47,333 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 36 changer transitions 0/142 dead transitions. [2024-06-21 21:36:47,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 1406 flow [2024-06-21 21:36:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:36:47,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:36:47,335 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 994 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:36:47,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 1406 flow [2024-06-21 21:36:47,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 142 transitions, 1287 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:47,357 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1018 flow [2024-06-21 21:36:47,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-21 21:36:47,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 21:36:47,358 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1018 flow [2024-06-21 21:36:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:47,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:47,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:47,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:36:47,359 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:47,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:47,359 INFO L85 PathProgramCache]: Analyzing trace with hash 28052872, now seen corresponding path program 4 times [2024-06-21 21:36:47,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:47,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685114200] [2024-06-21 21:36:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:47,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:50,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685114200] [2024-06-21 21:36:50,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685114200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:50,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679770986] [2024-06-21 21:36:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:50,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:50,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1018 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:50,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:50,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:50,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:50,998 INFO L124 PetriNetUnfolderBase]: 1517/2338 cut-off events. [2024-06-21 21:36:50,998 INFO L125 PetriNetUnfolderBase]: For 36113/36142 co-relation queries the response was YES. [2024-06-21 21:36:51,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2338 events. 1517/2338 cut-off events. For 36113/36142 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11134 event pairs, 429 based on Foata normal form. 30/2368 useless extension candidates. Maximal degree in co-relation 12577. Up to 2051 conditions per place. [2024-06-21 21:36:51,013 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 48 changer transitions 0/148 dead transitions. [2024-06-21 21:36:51,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 1404 flow [2024-06-21 21:36:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:36:51,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:36:51,015 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1018 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:36:51,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 1404 flow [2024-06-21 21:36:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 148 transitions, 1273 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:51,041 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 992 flow [2024-06-21 21:36:51,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-21 21:36:51,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 21:36:51,041 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 992 flow [2024-06-21 21:36:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:51,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:51,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:51,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:36:51,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:51,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash -984238240, now seen corresponding path program 1 times [2024-06-21 21:36:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780997693] [2024-06-21 21:36:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780997693] [2024-06-21 21:36:53,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780997693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:53,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:53,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:36:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255421683] [2024-06-21 21:36:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:53,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:36:53,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:36:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:36:53,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:53,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 992 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:53,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:53,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:53,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:54,253 INFO L124 PetriNetUnfolderBase]: 1416/2204 cut-off events. [2024-06-21 21:36:54,253 INFO L125 PetriNetUnfolderBase]: For 37632/37646 co-relation queries the response was YES. [2024-06-21 21:36:54,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12180 conditions, 2204 events. 1416/2204 cut-off events. For 37632/37646 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10551 event pairs, 409 based on Foata normal form. 15/2205 useless extension candidates. Maximal degree in co-relation 12135. Up to 2094 conditions per place. [2024-06-21 21:36:54,265 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 111 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-06-21 21:36:54,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1298 flow [2024-06-21 21:36:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:36:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:36:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:36:54,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 21:36:54,267 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 992 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:36:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1298 flow [2024-06-21 21:36:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 1182 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:36:54,291 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 949 flow [2024-06-21 21:36:54,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=949, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-21 21:36:54,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 21:36:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 949 flow [2024-06-21 21:36:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:36:54,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1590116003, now seen corresponding path program 1 times [2024-06-21 21:36:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247923657] [2024-06-21 21:36:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247923657] [2024-06-21 21:36:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247923657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:56,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:56,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494591890] [2024-06-21 21:36:56,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:56,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:56,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:56,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:56,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:56,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:56,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:56,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:57,565 INFO L124 PetriNetUnfolderBase]: 1525/2354 cut-off events. [2024-06-21 21:36:57,565 INFO L125 PetriNetUnfolderBase]: For 40351/40380 co-relation queries the response was YES. [2024-06-21 21:36:57,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13031 conditions, 2354 events. 1525/2354 cut-off events. For 40351/40380 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11224 event pairs, 261 based on Foata normal form. 32/2386 useless extension candidates. Maximal degree in co-relation 12984. Up to 2016 conditions per place. [2024-06-21 21:36:57,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 39 changer transitions 0/158 dead transitions. [2024-06-21 21:36:57,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 158 transitions, 1399 flow [2024-06-21 21:36:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:36:57,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:36:57,578 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 949 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:36:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 158 transitions, 1399 flow [2024-06-21 21:36:57,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 158 transitions, 1373 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:57,600 INFO L231 Difference]: Finished difference. Result has 107 places, 122 transitions, 1054 flow [2024-06-21 21:36:57,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1054, PETRI_PLACES=107, PETRI_TRANSITIONS=122} [2024-06-21 21:36:57,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-21 21:36:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 122 transitions, 1054 flow [2024-06-21 21:36:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:57,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:57,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:57,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:36:57,602 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:57,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash 878568427, now seen corresponding path program 2 times [2024-06-21 21:36:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:57,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796638929] [2024-06-21 21:36:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796638929] [2024-06-21 21:37:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796638929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91341154] [2024-06-21 21:37:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:00,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:00,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:00,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 122 transitions, 1054 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:00,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:00,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:00,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:01,113 INFO L124 PetriNetUnfolderBase]: 1545/2386 cut-off events. [2024-06-21 21:37:01,113 INFO L125 PetriNetUnfolderBase]: For 44903/44932 co-relation queries the response was YES. [2024-06-21 21:37:01,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13587 conditions, 2386 events. 1545/2386 cut-off events. For 44903/44932 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11395 event pairs, 395 based on Foata normal form. 32/2418 useless extension candidates. Maximal degree in co-relation 13539. Up to 2159 conditions per place. [2024-06-21 21:37:01,128 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 35 changer transitions 0/158 dead transitions. [2024-06-21 21:37:01,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 158 transitions, 1504 flow [2024-06-21 21:37:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:37:01,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:37:01,129 INFO L175 Difference]: Start difference. First operand has 107 places, 122 transitions, 1054 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:37:01,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 158 transitions, 1504 flow [2024-06-21 21:37:01,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1391 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:01,171 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 1068 flow [2024-06-21 21:37:01,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1068, PETRI_PLACES=109, PETRI_TRANSITIONS=124} [2024-06-21 21:37:01,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 21:37:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 1068 flow [2024-06-21 21:37:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:01,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:01,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:37:01,172 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:01,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash -274525873, now seen corresponding path program 3 times [2024-06-21 21:37:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266874197] [2024-06-21 21:37:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:03,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:03,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266874197] [2024-06-21 21:37:03,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266874197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:03,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:03,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:03,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780504012] [2024-06-21 21:37:03,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:03,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:03,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 124 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:03,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:03,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:03,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:04,763 INFO L124 PetriNetUnfolderBase]: 1640/2536 cut-off events. [2024-06-21 21:37:04,763 INFO L125 PetriNetUnfolderBase]: For 50492/50506 co-relation queries the response was YES. [2024-06-21 21:37:04,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14604 conditions, 2536 events. 1640/2536 cut-off events. For 50492/50506 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12318 event pairs, 394 based on Foata normal form. 13/2549 useless extension candidates. Maximal degree in co-relation 14555. Up to 2248 conditions per place. [2024-06-21 21:37:04,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 133 selfloop transitions, 49 changer transitions 0/186 dead transitions. [2024-06-21 21:37:04,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 186 transitions, 1819 flow [2024-06-21 21:37:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:37:04,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:37:04,781 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 1068 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:37:04,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 186 transitions, 1819 flow [2024-06-21 21:37:04,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1678 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:04,823 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1372 flow [2024-06-21 21:37:04,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1372, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-21 21:37:04,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:37:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1372 flow [2024-06-21 21:37:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:04,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:04,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:04,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:37:04,824 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:04,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1372910769, now seen corresponding path program 4 times [2024-06-21 21:37:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:04,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270016041] [2024-06-21 21:37:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:06,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270016041] [2024-06-21 21:37:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270016041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906893348] [2024-06-21 21:37:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1372 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:06,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:07,839 INFO L124 PetriNetUnfolderBase]: 1790/2777 cut-off events. [2024-06-21 21:37:07,839 INFO L125 PetriNetUnfolderBase]: For 56665/56682 co-relation queries the response was YES. [2024-06-21 21:37:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16496 conditions, 2777 events. 1790/2777 cut-off events. For 56665/56682 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13906 event pairs, 492 based on Foata normal form. 21/2798 useless extension candidates. Maximal degree in co-relation 16441. Up to 2404 conditions per place. [2024-06-21 21:37:07,859 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 144 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-21 21:37:07,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 228 transitions, 2391 flow [2024-06-21 21:37:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 21:37:07,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:37:07,862 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1372 flow. Second operand 10 states and 174 transitions. [2024-06-21 21:37:07,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 228 transitions, 2391 flow [2024-06-21 21:37:07,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 228 transitions, 2201 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:07,919 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1868 flow [2024-06-21 21:37:07,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1868, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-21 21:37:07,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 21:37:07,919 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1868 flow [2024-06-21 21:37:07,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:07,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:07,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:37:07,920 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:07,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 556441441, now seen corresponding path program 1 times [2024-06-21 21:37:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339894413] [2024-06-21 21:37:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339894413] [2024-06-21 21:37:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339894413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:10,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689689161] [2024-06-21 21:37:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:10,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:10,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1868 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:10,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:10,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:10,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:11,680 INFO L124 PetriNetUnfolderBase]: 1884/2931 cut-off events. [2024-06-21 21:37:11,680 INFO L125 PetriNetUnfolderBase]: For 67040/67057 co-relation queries the response was YES. [2024-06-21 21:37:11,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17723 conditions, 2931 events. 1884/2931 cut-off events. For 67040/67057 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14867 event pairs, 509 based on Foata normal form. 33/2964 useless extension candidates. Maximal degree in co-relation 17663. Up to 2502 conditions per place. [2024-06-21 21:37:11,704 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 159 selfloop transitions, 79 changer transitions 0/242 dead transitions. [2024-06-21 21:37:11,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 242 transitions, 2599 flow [2024-06-21 21:37:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:37:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:37:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 21:37:11,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 21:37:11,706 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1868 flow. Second operand 11 states and 191 transitions. [2024-06-21 21:37:11,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 242 transitions, 2599 flow [2024-06-21 21:37:11,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 242 transitions, 2459 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:11,774 INFO L231 Difference]: Finished difference. Result has 137 places, 187 transitions, 1982 flow [2024-06-21 21:37:11,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1982, PETRI_PLACES=137, PETRI_TRANSITIONS=187} [2024-06-21 21:37:11,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:37:11,775 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 187 transitions, 1982 flow [2024-06-21 21:37:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:11,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:11,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:37:11,775 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:11,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -167420649, now seen corresponding path program 5 times [2024-06-21 21:37:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721585067] [2024-06-21 21:37:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721585067] [2024-06-21 21:37:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721585067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199219875] [2024-06-21 21:37:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:13,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 187 transitions, 1982 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:15,028 INFO L124 PetriNetUnfolderBase]: 1904/2966 cut-off events. [2024-06-21 21:37:15,029 INFO L125 PetriNetUnfolderBase]: For 69528/69562 co-relation queries the response was YES. [2024-06-21 21:37:15,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18171 conditions, 2966 events. 1904/2966 cut-off events. For 69528/69562 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15120 event pairs, 513 based on Foata normal form. 37/3003 useless extension candidates. Maximal degree in co-relation 18108. Up to 2482 conditions per place. [2024-06-21 21:37:15,048 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 86 changer transitions 0/223 dead transitions. [2024-06-21 21:37:15,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2588 flow [2024-06-21 21:37:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:37:15,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:37:15,050 INFO L175 Difference]: Start difference. First operand has 137 places, 187 transitions, 1982 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:37:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2588 flow [2024-06-21 21:37:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 223 transitions, 2422 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:15,116 INFO L231 Difference]: Finished difference. Result has 138 places, 189 transitions, 2070 flow [2024-06-21 21:37:15,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2070, PETRI_PLACES=138, PETRI_TRANSITIONS=189} [2024-06-21 21:37:15,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 21:37:15,117 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 189 transitions, 2070 flow [2024-06-21 21:37:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:15,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:37:15,117 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -528581961, now seen corresponding path program 6 times [2024-06-21 21:37:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557690213] [2024-06-21 21:37:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:17,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:17,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557690213] [2024-06-21 21:37:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557690213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:17,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:17,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809878201] [2024-06-21 21:37:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:17,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:17,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 189 transitions, 2070 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:17,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:17,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:18,629 INFO L124 PetriNetUnfolderBase]: 1924/3007 cut-off events. [2024-06-21 21:37:18,629 INFO L125 PetriNetUnfolderBase]: For 74502/74510 co-relation queries the response was YES. [2024-06-21 21:37:18,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18745 conditions, 3007 events. 1924/3007 cut-off events. For 74502/74510 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15461 event pairs, 654 based on Foata normal form. 12/3019 useless extension candidates. Maximal degree in co-relation 18681. Up to 2749 conditions per place. [2024-06-21 21:37:18,648 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 49 changer transitions 0/240 dead transitions. [2024-06-21 21:37:18,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 240 transitions, 2759 flow [2024-06-21 21:37:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:37:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:37:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 21:37:18,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 21:37:18,650 INFO L175 Difference]: Start difference. First operand has 138 places, 189 transitions, 2070 flow. Second operand 11 states and 185 transitions. [2024-06-21 21:37:18,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 240 transitions, 2759 flow [2024-06-21 21:37:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 240 transitions, 2527 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:18,735 INFO L231 Difference]: Finished difference. Result has 143 places, 191 transitions, 2011 flow [2024-06-21 21:37:18,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2011, PETRI_PLACES=143, PETRI_TRANSITIONS=191} [2024-06-21 21:37:18,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 21:37:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 191 transitions, 2011 flow [2024-06-21 21:37:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:18,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:18,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:37:18,737 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:18,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1035686013, now seen corresponding path program 7 times [2024-06-21 21:37:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693685978] [2024-06-21 21:37:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693685978] [2024-06-21 21:37:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693685978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:20,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:20,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864523827] [2024-06-21 21:37:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:21,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:21,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 191 transitions, 2011 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:21,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:21,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:21,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:22,241 INFO L124 PetriNetUnfolderBase]: 1944/3039 cut-off events. [2024-06-21 21:37:22,241 INFO L125 PetriNetUnfolderBase]: For 68329/68337 co-relation queries the response was YES. [2024-06-21 21:37:22,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18406 conditions, 3039 events. 1944/3039 cut-off events. For 68329/68337 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15720 event pairs, 660 based on Foata normal form. 12/3051 useless extension candidates. Maximal degree in co-relation 18341. Up to 2807 conditions per place. [2024-06-21 21:37:22,262 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 190 selfloop transitions, 43 changer transitions 0/237 dead transitions. [2024-06-21 21:37:22,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 237 transitions, 2674 flow [2024-06-21 21:37:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:37:22,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:37:22,264 INFO L175 Difference]: Start difference. First operand has 143 places, 191 transitions, 2011 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:37:22,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 237 transitions, 2674 flow [2024-06-21 21:37:22,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 237 transitions, 2527 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:37:22,339 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 2021 flow [2024-06-21 21:37:22,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2021, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-21 21:37:22,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 21:37:22,340 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 2021 flow [2024-06-21 21:37:22,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:22,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:22,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:22,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:37:22,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:22,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1035833883, now seen corresponding path program 8 times [2024-06-21 21:37:22,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:22,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997107130] [2024-06-21 21:37:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:24,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997107130] [2024-06-21 21:37:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997107130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:24,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598314354] [2024-06-21 21:37:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:24,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:24,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:24,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 2021 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:24,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:24,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:24,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:25,407 INFO L124 PetriNetUnfolderBase]: 1964/3062 cut-off events. [2024-06-21 21:37:25,407 INFO L125 PetriNetUnfolderBase]: For 74081/74115 co-relation queries the response was YES. [2024-06-21 21:37:25,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18779 conditions, 3062 events. 1964/3062 cut-off events. For 74081/74115 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15666 event pairs, 414 based on Foata normal form. 37/3099 useless extension candidates. Maximal degree in co-relation 18713. Up to 2688 conditions per place. [2024-06-21 21:37:25,429 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 162 selfloop transitions, 58 changer transitions 0/224 dead transitions. [2024-06-21 21:37:25,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2615 flow [2024-06-21 21:37:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:37:25,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:37:25,430 INFO L175 Difference]: Start difference. First operand has 144 places, 193 transitions, 2021 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:37:25,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2615 flow [2024-06-21 21:37:25,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 224 transitions, 2482 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:25,507 INFO L231 Difference]: Finished difference. Result has 144 places, 195 transitions, 2079 flow [2024-06-21 21:37:25,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2079, PETRI_PLACES=144, PETRI_TRANSITIONS=195} [2024-06-21 21:37:25,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 21:37:25,508 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 195 transitions, 2079 flow [2024-06-21 21:37:25,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:25,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:25,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:25,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:37:25,509 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:25,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash -519642517, now seen corresponding path program 2 times [2024-06-21 21:37:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:25,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202806664] [2024-06-21 21:37:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202806664] [2024-06-21 21:37:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202806664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:28,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532799045] [2024-06-21 21:37:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:28,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:28,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:28,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:28,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 195 transitions, 2079 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:28,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:28,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:28,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:29,547 INFO L124 PetriNetUnfolderBase]: 2169/3394 cut-off events. [2024-06-21 21:37:29,547 INFO L125 PetriNetUnfolderBase]: For 86881/86904 co-relation queries the response was YES. [2024-06-21 21:37:29,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20933 conditions, 3394 events. 2169/3394 cut-off events. For 86881/86904 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17969 event pairs, 442 based on Foata normal form. 39/3433 useless extension candidates. Maximal degree in co-relation 20866. Up to 2842 conditions per place. [2024-06-21 21:37:29,570 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 175 selfloop transitions, 99 changer transitions 0/278 dead transitions. [2024-06-21 21:37:29,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 278 transitions, 3178 flow [2024-06-21 21:37:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:37:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:37:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 21:37:29,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 21:37:29,572 INFO L175 Difference]: Start difference. First operand has 144 places, 195 transitions, 2079 flow. Second operand 11 states and 191 transitions. [2024-06-21 21:37:29,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 278 transitions, 3178 flow [2024-06-21 21:37:29,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 2987 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:29,681 INFO L231 Difference]: Finished difference. Result has 154 places, 225 transitions, 2562 flow [2024-06-21 21:37:29,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2562, PETRI_PLACES=154, PETRI_TRANSITIONS=225} [2024-06-21 21:37:29,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 21:37:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 225 transitions, 2562 flow [2024-06-21 21:37:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:29,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:29,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:29,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:37:29,682 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:29,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash -181562699, now seen corresponding path program 3 times [2024-06-21 21:37:29,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:29,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911441925] [2024-06-21 21:37:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:29,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:32,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:32,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911441925] [2024-06-21 21:37:32,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911441925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:32,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:32,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:32,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674612025] [2024-06-21 21:37:32,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:32,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:32,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:32,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:32,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 225 transitions, 2562 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:32,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:32,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:32,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:33,588 INFO L124 PetriNetUnfolderBase]: 2237/3524 cut-off events. [2024-06-21 21:37:33,588 INFO L125 PetriNetUnfolderBase]: For 96982/97020 co-relation queries the response was YES. [2024-06-21 21:37:33,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22123 conditions, 3524 events. 2237/3524 cut-off events. For 96982/97020 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19012 event pairs, 599 based on Foata normal form. 53/3577 useless extension candidates. Maximal degree in co-relation 22051. Up to 3079 conditions per place. [2024-06-21 21:37:33,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 71 changer transitions 0/263 dead transitions. [2024-06-21 21:37:33,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 263 transitions, 3269 flow [2024-06-21 21:37:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:37:33,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:37:33,614 INFO L175 Difference]: Start difference. First operand has 154 places, 225 transitions, 2562 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:37:33,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 263 transitions, 3269 flow [2024-06-21 21:37:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 263 transitions, 3123 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:33,705 INFO L231 Difference]: Finished difference. Result has 158 places, 226 transitions, 2613 flow [2024-06-21 21:37:33,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2613, PETRI_PLACES=158, PETRI_TRANSITIONS=226} [2024-06-21 21:37:33,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 21:37:33,705 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 226 transitions, 2613 flow [2024-06-21 21:37:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:33,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:33,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:33,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:37:33,706 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:33,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -528366759, now seen corresponding path program 4 times [2024-06-21 21:37:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:33,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386006124] [2024-06-21 21:37:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386006124] [2024-06-21 21:37:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386006124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915307351] [2024-06-21 21:37:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:36,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:36,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 226 transitions, 2613 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:36,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:36,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:36,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:37,668 INFO L124 PetriNetUnfolderBase]: 2381/3768 cut-off events. [2024-06-21 21:37:37,668 INFO L125 PetriNetUnfolderBase]: For 111272/111310 co-relation queries the response was YES. [2024-06-21 21:37:37,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24200 conditions, 3768 events. 2381/3768 cut-off events. For 111272/111310 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20743 event pairs, 591 based on Foata normal form. 49/3817 useless extension candidates. Maximal degree in co-relation 24127. Up to 2892 conditions per place. [2024-06-21 21:37:37,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 93 changer transitions 0/278 dead transitions. [2024-06-21 21:37:37,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 278 transitions, 3566 flow [2024-06-21 21:37:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:37:37,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:37:37,695 INFO L175 Difference]: Start difference. First operand has 158 places, 226 transitions, 2613 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:37:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 278 transitions, 3566 flow [2024-06-21 21:37:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 278 transitions, 3401 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:37,809 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2738 flow [2024-06-21 21:37:37,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2738, PETRI_PLACES=161, PETRI_TRANSITIONS=228} [2024-06-21 21:37:37,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 21:37:37,809 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2738 flow [2024-06-21 21:37:37,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:37,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:37,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:37:37,810 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:37,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:37,810 INFO L85 PathProgramCache]: Analyzing trace with hash -528576009, now seen corresponding path program 5 times [2024-06-21 21:37:37,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:37,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443869890] [2024-06-21 21:37:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:37,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:40,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443869890] [2024-06-21 21:37:40,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443869890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:40,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:40,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171409107] [2024-06-21 21:37:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:40,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:40,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:40,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 228 transitions, 2738 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:40,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:40,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:40,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:42,310 INFO L124 PetriNetUnfolderBase]: 2517/4000 cut-off events. [2024-06-21 21:37:42,310 INFO L125 PetriNetUnfolderBase]: For 132509/132547 co-relation queries the response was YES. [2024-06-21 21:37:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25973 conditions, 4000 events. 2517/4000 cut-off events. For 132509/132547 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22590 event pairs, 669 based on Foata normal form. 69/4069 useless extension candidates. Maximal degree in co-relation 25899. Up to 3346 conditions per place. [2024-06-21 21:37:42,340 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 85 changer transitions 0/274 dead transitions. [2024-06-21 21:37:42,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 274 transitions, 3565 flow [2024-06-21 21:37:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:37:42,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:37:42,342 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2738 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:37:42,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 274 transitions, 3565 flow [2024-06-21 21:37:42,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 274 transitions, 3417 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:42,476 INFO L231 Difference]: Finished difference. Result has 165 places, 230 transitions, 2875 flow [2024-06-21 21:37:42,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2875, PETRI_PLACES=165, PETRI_TRANSITIONS=230} [2024-06-21 21:37:42,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 21:37:42,477 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 230 transitions, 2875 flow [2024-06-21 21:37:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:42,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:42,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:42,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:37:42,477 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:42,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -528374199, now seen corresponding path program 6 times [2024-06-21 21:37:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168402662] [2024-06-21 21:37:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:45,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:45,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168402662] [2024-06-21 21:37:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168402662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:45,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:45,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632407953] [2024-06-21 21:37:45,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:45,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 230 transitions, 2875 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:45,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:45,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:47,193 INFO L124 PetriNetUnfolderBase]: 2489/3956 cut-off events. [2024-06-21 21:37:47,194 INFO L125 PetriNetUnfolderBase]: For 123326/123364 co-relation queries the response was YES. [2024-06-21 21:37:47,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25457 conditions, 3956 events. 2489/3956 cut-off events. For 123326/123364 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22246 event pairs, 653 based on Foata normal form. 53/4009 useless extension candidates. Maximal degree in co-relation 25381. Up to 3128 conditions per place. [2024-06-21 21:37:47,226 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 95 changer transitions 0/280 dead transitions. [2024-06-21 21:37:47,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 280 transitions, 3634 flow [2024-06-21 21:37:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 21:37:47,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:37:47,228 INFO L175 Difference]: Start difference. First operand has 165 places, 230 transitions, 2875 flow. Second operand 10 states and 174 transitions. [2024-06-21 21:37:47,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 280 transitions, 3634 flow [2024-06-21 21:37:47,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 280 transitions, 3409 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:47,378 INFO L231 Difference]: Finished difference. Result has 168 places, 230 transitions, 2854 flow [2024-06-21 21:37:47,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2854, PETRI_PLACES=168, PETRI_TRANSITIONS=230} [2024-06-21 21:37:47,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:37:47,379 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 230 transitions, 2854 flow [2024-06-21 21:37:47,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:47,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:47,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:37:47,379 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:47,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1540270821, now seen corresponding path program 9 times [2024-06-21 21:37:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:47,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025417071] [2024-06-21 21:37:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:47,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025417071] [2024-06-21 21:37:49,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025417071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:49,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:49,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:49,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091584692] [2024-06-21 21:37:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:49,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:49,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:49,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 230 transitions, 2854 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:49,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:49,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:49,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:51,043 INFO L124 PetriNetUnfolderBase]: 2481/3944 cut-off events. [2024-06-21 21:37:51,044 INFO L125 PetriNetUnfolderBase]: For 113459/113497 co-relation queries the response was YES. [2024-06-21 21:37:51,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25024 conditions, 3944 events. 2481/3944 cut-off events. For 113459/113497 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22248 event pairs, 651 based on Foata normal form. 41/3985 useless extension candidates. Maximal degree in co-relation 24947. Up to 3584 conditions per place. [2024-06-21 21:37:51,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-21 21:37:51,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 261 transitions, 3543 flow [2024-06-21 21:37:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:37:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:37:51,077 INFO L175 Difference]: Start difference. First operand has 168 places, 230 transitions, 2854 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:37:51,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 261 transitions, 3543 flow [2024-06-21 21:37:51,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 261 transitions, 3359 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:37:51,201 INFO L231 Difference]: Finished difference. Result has 167 places, 232 transitions, 2902 flow [2024-06-21 21:37:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2902, PETRI_PLACES=167, PETRI_TRANSITIONS=232} [2024-06-21 21:37:51,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 21:37:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 232 transitions, 2902 flow [2024-06-21 21:37:51,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:51,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:37:51,202 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:51,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1466655761, now seen corresponding path program 7 times [2024-06-21 21:37:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:51,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599106295] [2024-06-21 21:37:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:53,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599106295] [2024-06-21 21:37:53,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599106295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:53,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:53,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:53,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856655361] [2024-06-21 21:37:53,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:53,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:53,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:54,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:54,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 232 transitions, 2902 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:54,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:54,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:54,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:55,467 INFO L124 PetriNetUnfolderBase]: 2521/4016 cut-off events. [2024-06-21 21:37:55,467 INFO L125 PetriNetUnfolderBase]: For 128122/128160 co-relation queries the response was YES. [2024-06-21 21:37:55,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25486 conditions, 4016 events. 2521/4016 cut-off events. For 128122/128160 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22729 event pairs, 632 based on Foata normal form. 53/4069 useless extension candidates. Maximal degree in co-relation 25408. Up to 3174 conditions per place. [2024-06-21 21:37:55,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 113 changer transitions 0/275 dead transitions. [2024-06-21 21:37:55,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 275 transitions, 3657 flow [2024-06-21 21:37:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:37:55,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:37:55,496 INFO L175 Difference]: Start difference. First operand has 167 places, 232 transitions, 2902 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:37:55,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 275 transitions, 3657 flow [2024-06-21 21:37:55,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 275 transitions, 3453 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:55,629 INFO L231 Difference]: Finished difference. Result has 171 places, 233 transitions, 2996 flow [2024-06-21 21:37:55,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2996, PETRI_PLACES=171, PETRI_TRANSITIONS=233} [2024-06-21 21:37:55,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 21:37:55,630 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 233 transitions, 2996 flow [2024-06-21 21:37:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:55,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:55,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:37:55,631 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:55,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -571762025, now seen corresponding path program 1 times [2024-06-21 21:37:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451115942] [2024-06-21 21:37:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451115942] [2024-06-21 21:37:58,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451115942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:58,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:58,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426444084] [2024-06-21 21:37:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:58,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:58,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 233 transitions, 2996 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:58,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:59,404 INFO L124 PetriNetUnfolderBase]: 2673/4274 cut-off events. [2024-06-21 21:37:59,404 INFO L125 PetriNetUnfolderBase]: For 137212/137235 co-relation queries the response was YES. [2024-06-21 21:37:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26917 conditions, 4274 events. 2673/4274 cut-off events. For 137212/137235 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 24917 event pairs, 604 based on Foata normal form. 35/4309 useless extension candidates. Maximal degree in co-relation 26838. Up to 3666 conditions per place. [2024-06-21 21:37:59,443 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 200 selfloop transitions, 101 changer transitions 0/305 dead transitions. [2024-06-21 21:37:59,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 305 transitions, 3928 flow [2024-06-21 21:37:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:37:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:37:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 21:37:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 21:37:59,445 INFO L175 Difference]: Start difference. First operand has 171 places, 233 transitions, 2996 flow. Second operand 11 states and 193 transitions. [2024-06-21 21:37:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 305 transitions, 3928 flow [2024-06-21 21:37:59,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 305 transitions, 3668 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:59,621 INFO L231 Difference]: Finished difference. Result has 178 places, 246 transitions, 3145 flow [2024-06-21 21:37:59,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3145, PETRI_PLACES=178, PETRI_TRANSITIONS=246} [2024-06-21 21:37:59,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 21:37:59,622 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 246 transitions, 3145 flow [2024-06-21 21:37:59,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:59,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:59,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:37:59,622 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2032068965, now seen corresponding path program 2 times [2024-06-21 21:37:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925606103] [2024-06-21 21:37:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:02,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925606103] [2024-06-21 21:38:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925606103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:02,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:02,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960796592] [2024-06-21 21:38:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:02,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:02,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 246 transitions, 3145 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:02,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:02,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:02,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:03,611 INFO L124 PetriNetUnfolderBase]: 2721/4355 cut-off events. [2024-06-21 21:38:03,611 INFO L125 PetriNetUnfolderBase]: For 128318/128341 co-relation queries the response was YES. [2024-06-21 21:38:03,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27235 conditions, 4355 events. 2721/4355 cut-off events. For 128318/128341 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25375 event pairs, 684 based on Foata normal form. 35/4390 useless extension candidates. Maximal degree in co-relation 27152. Up to 3836 conditions per place. [2024-06-21 21:38:03,648 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 203 selfloop transitions, 96 changer transitions 0/303 dead transitions. [2024-06-21 21:38:03,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 3972 flow [2024-06-21 21:38:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 21:38:03,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 21:38:03,650 INFO L175 Difference]: Start difference. First operand has 178 places, 246 transitions, 3145 flow. Second operand 11 states and 190 transitions. [2024-06-21 21:38:03,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 3972 flow [2024-06-21 21:38:03,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 303 transitions, 3748 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:03,836 INFO L231 Difference]: Finished difference. Result has 183 places, 247 transitions, 3176 flow [2024-06-21 21:38:03,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3176, PETRI_PLACES=183, PETRI_TRANSITIONS=247} [2024-06-21 21:38:03,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 21:38:03,836 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 247 transitions, 3176 flow [2024-06-21 21:38:03,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:03,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:03,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:03,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:38:03,837 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:03,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash 217105007, now seen corresponding path program 3 times [2024-06-21 21:38:03,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:03,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341393935] [2024-06-21 21:38:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341393935] [2024-06-21 21:38:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341393935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:06,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:06,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423739233] [2024-06-21 21:38:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:06,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:06,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 247 transitions, 3176 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:06,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:06,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:06,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:07,944 INFO L124 PetriNetUnfolderBase]: 2789/4471 cut-off events. [2024-06-21 21:38:07,944 INFO L125 PetriNetUnfolderBase]: For 137158/137181 co-relation queries the response was YES. [2024-06-21 21:38:07,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27804 conditions, 4471 events. 2789/4471 cut-off events. For 137158/137181 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26261 event pairs, 743 based on Foata normal form. 35/4506 useless extension candidates. Maximal degree in co-relation 27720. Up to 3998 conditions per place. [2024-06-21 21:38:07,979 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 205 selfloop transitions, 96 changer transitions 0/305 dead transitions. [2024-06-21 21:38:07,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 305 transitions, 4015 flow [2024-06-21 21:38:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 21:38:07,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 21:38:07,981 INFO L175 Difference]: Start difference. First operand has 183 places, 247 transitions, 3176 flow. Second operand 11 states and 190 transitions. [2024-06-21 21:38:07,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 305 transitions, 4015 flow [2024-06-21 21:38:08,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 305 transitions, 3780 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:38:08,228 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 3213 flow [2024-06-21 21:38:08,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3213, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-21 21:38:08,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 21:38:08,229 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 3213 flow [2024-06-21 21:38:08,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:08,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:08,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:38:08,229 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:08,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash -584336785, now seen corresponding path program 4 times [2024-06-21 21:38:08,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:08,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051571712] [2024-06-21 21:38:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051571712] [2024-06-21 21:38:10,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051571712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:10,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897346817] [2024-06-21 21:38:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:10,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:10,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:10,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:10,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 3213 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:10,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:10,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:12,153 INFO L124 PetriNetUnfolderBase]: 3059/4928 cut-off events. [2024-06-21 21:38:12,153 INFO L125 PetriNetUnfolderBase]: For 145259/145282 co-relation queries the response was YES. [2024-06-21 21:38:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29829 conditions, 4928 events. 3059/4928 cut-off events. For 145259/145282 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 29402 event pairs, 517 based on Foata normal form. 35/4963 useless extension candidates. Maximal degree in co-relation 29743. Up to 3936 conditions per place. [2024-06-21 21:38:12,297 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 200 selfloop transitions, 131 changer transitions 0/335 dead transitions. [2024-06-21 21:38:12,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 335 transitions, 4348 flow [2024-06-21 21:38:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 21:38:12,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 21:38:12,299 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 3213 flow. Second operand 11 states and 191 transitions. [2024-06-21 21:38:12,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 335 transitions, 4348 flow [2024-06-21 21:38:12,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 335 transitions, 4114 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:12,506 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3630 flow [2024-06-21 21:38:12,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3630, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-21 21:38:12,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 21:38:12,506 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3630 flow [2024-06-21 21:38:12,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:12,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:12,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:12,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:38:12,507 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:12,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash -282370239, now seen corresponding path program 1 times [2024-06-21 21:38:12,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:12,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353317416] [2024-06-21 21:38:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:12,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353317416] [2024-06-21 21:38:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353317416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:14,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331479589] [2024-06-21 21:38:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:14,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:14,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3630 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:14,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:14,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:15,882 INFO L124 PetriNetUnfolderBase]: 3064/4942 cut-off events. [2024-06-21 21:38:15,882 INFO L125 PetriNetUnfolderBase]: For 143342/143354 co-relation queries the response was YES. [2024-06-21 21:38:15,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30597 conditions, 4942 events. 3064/4942 cut-off events. For 143342/143354 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29754 event pairs, 1061 based on Foata normal form. 13/4955 useless extension candidates. Maximal degree in co-relation 30507. Up to 4701 conditions per place. [2024-06-21 21:38:15,929 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 42 changer transitions 0/326 dead transitions. [2024-06-21 21:38:15,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 326 transitions, 4582 flow [2024-06-21 21:38:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:38:15,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:38:15,930 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3630 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:38:15,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 326 transitions, 4582 flow [2024-06-21 21:38:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 326 transitions, 4336 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:16,170 INFO L231 Difference]: Finished difference. Result has 197 places, 293 transitions, 3662 flow [2024-06-21 21:38:16,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3662, PETRI_PLACES=197, PETRI_TRANSITIONS=293} [2024-06-21 21:38:16,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 21:38:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 293 transitions, 3662 flow [2024-06-21 21:38:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:16,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:16,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:38:16,172 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:16,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 654357737, now seen corresponding path program 5 times [2024-06-21 21:38:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:16,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785527422] [2024-06-21 21:38:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:18,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785527422] [2024-06-21 21:38:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785527422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:18,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111646526] [2024-06-21 21:38:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:18,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:18,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 293 transitions, 3662 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:18,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:18,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:18,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:20,473 INFO L124 PetriNetUnfolderBase]: 3112/5022 cut-off events. [2024-06-21 21:38:20,473 INFO L125 PetriNetUnfolderBase]: For 157205/157243 co-relation queries the response was YES. [2024-06-21 21:38:20,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31133 conditions, 5022 events. 3112/5022 cut-off events. For 157205/157243 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30087 event pairs, 497 based on Foata normal form. 49/5071 useless extension candidates. Maximal degree in co-relation 31040. Up to 3787 conditions per place. [2024-06-21 21:38:20,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 135 changer transitions 0/337 dead transitions. [2024-06-21 21:38:20,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 337 transitions, 4536 flow [2024-06-21 21:38:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:38:20,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:38:20,522 INFO L175 Difference]: Start difference. First operand has 197 places, 293 transitions, 3662 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:38:20,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 337 transitions, 4536 flow [2024-06-21 21:38:20,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 337 transitions, 4494 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 21:38:20,807 INFO L231 Difference]: Finished difference. Result has 205 places, 294 transitions, 3964 flow [2024-06-21 21:38:20,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3964, PETRI_PLACES=205, PETRI_TRANSITIONS=294} [2024-06-21 21:38:20,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 21:38:20,808 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 294 transitions, 3964 flow [2024-06-21 21:38:20,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:20,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:20,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:38:20,809 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:20,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1066299819, now seen corresponding path program 6 times [2024-06-21 21:38:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892663275] [2024-06-21 21:38:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892663275] [2024-06-21 21:38:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892663275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:23,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148640474] [2024-06-21 21:38:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:23,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:23,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 294 transitions, 3964 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:23,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:23,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:23,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:25,195 INFO L124 PetriNetUnfolderBase]: 3160/5109 cut-off events. [2024-06-21 21:38:25,195 INFO L125 PetriNetUnfolderBase]: For 171149/171187 co-relation queries the response was YES. [2024-06-21 21:38:25,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32544 conditions, 5109 events. 3160/5109 cut-off events. For 171149/171187 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30953 event pairs, 883 based on Foata normal form. 49/5158 useless extension candidates. Maximal degree in co-relation 32448. Up to 4469 conditions per place. [2024-06-21 21:38:25,244 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 103 changer transitions 0/337 dead transitions. [2024-06-21 21:38:25,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 337 transitions, 4851 flow [2024-06-21 21:38:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:38:25,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:38:25,246 INFO L175 Difference]: Start difference. First operand has 205 places, 294 transitions, 3964 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:38:25,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 337 transitions, 4851 flow [2024-06-21 21:38:25,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 337 transitions, 4497 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:25,606 INFO L231 Difference]: Finished difference. Result has 206 places, 295 transitions, 3890 flow [2024-06-21 21:38:25,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3890, PETRI_PLACES=206, PETRI_TRANSITIONS=295} [2024-06-21 21:38:25,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 21:38:25,607 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 295 transitions, 3890 flow [2024-06-21 21:38:25,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:25,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:25,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:25,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:38:25,608 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:25,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1621261611, now seen corresponding path program 7 times [2024-06-21 21:38:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62410941] [2024-06-21 21:38:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:25,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:27,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:27,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62410941] [2024-06-21 21:38:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62410941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:27,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:27,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147135642] [2024-06-21 21:38:27,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:27,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:27,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:28,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:28,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 295 transitions, 3890 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:28,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:28,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:28,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:29,888 INFO L124 PetriNetUnfolderBase]: 3208/5189 cut-off events. [2024-06-21 21:38:29,888 INFO L125 PetriNetUnfolderBase]: For 162889/162927 co-relation queries the response was YES. [2024-06-21 21:38:29,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32356 conditions, 5189 events. 3208/5189 cut-off events. For 162889/162927 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31516 event pairs, 872 based on Foata normal form. 49/5238 useless extension candidates. Maximal degree in co-relation 32260. Up to 4355 conditions per place. [2024-06-21 21:38:29,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 113 changer transitions 0/339 dead transitions. [2024-06-21 21:38:29,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 339 transitions, 4777 flow [2024-06-21 21:38:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:38:29,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:38:29,937 INFO L175 Difference]: Start difference. First operand has 206 places, 295 transitions, 3890 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:38:29,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 339 transitions, 4777 flow [2024-06-21 21:38:30,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 339 transitions, 4519 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:30,268 INFO L231 Difference]: Finished difference. Result has 208 places, 296 transitions, 3930 flow [2024-06-21 21:38:30,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3930, PETRI_PLACES=208, PETRI_TRANSITIONS=296} [2024-06-21 21:38:30,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 21:38:30,268 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 296 transitions, 3930 flow [2024-06-21 21:38:30,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:30,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:30,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:30,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:38:30,269 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:30,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 627596437, now seen corresponding path program 8 times [2024-06-21 21:38:30,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:30,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619919694] [2024-06-21 21:38:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:30,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619919694] [2024-06-21 21:38:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619919694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:32,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:32,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660837996] [2024-06-21 21:38:32,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:32,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 296 transitions, 3930 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:34,599 INFO L124 PetriNetUnfolderBase]: 3256/5273 cut-off events. [2024-06-21 21:38:34,599 INFO L125 PetriNetUnfolderBase]: For 163714/163752 co-relation queries the response was YES. [2024-06-21 21:38:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32783 conditions, 5273 events. 3256/5273 cut-off events. For 163714/163752 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32193 event pairs, 959 based on Foata normal form. 49/5322 useless extension candidates. Maximal degree in co-relation 32686. Up to 4797 conditions per place. [2024-06-21 21:38:34,646 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 72 changer transitions 0/334 dead transitions. [2024-06-21 21:38:34,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 334 transitions, 4789 flow [2024-06-21 21:38:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:38:34,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:38:34,648 INFO L175 Difference]: Start difference. First operand has 208 places, 296 transitions, 3930 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:38:34,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 334 transitions, 4789 flow [2024-06-21 21:38:34,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 334 transitions, 4513 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:34,932 INFO L231 Difference]: Finished difference. Result has 209 places, 297 transitions, 3867 flow [2024-06-21 21:38:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3656, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=209, PETRI_TRANSITIONS=297} [2024-06-21 21:38:34,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 21:38:34,933 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 297 transitions, 3867 flow [2024-06-21 21:38:34,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:34,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:34,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:38:34,933 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:34,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash 623012467, now seen corresponding path program 9 times [2024-06-21 21:38:34,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:34,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115029682] [2024-06-21 21:38:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:34,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115029682] [2024-06-21 21:38:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115029682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:37,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:38:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13965524] [2024-06-21 21:38:37,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:37,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:38:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:38:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:38:37,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:37,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 297 transitions, 3867 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:37,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:37,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:37,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:39,113 INFO L124 PetriNetUnfolderBase]: 3236/5243 cut-off events. [2024-06-21 21:38:39,113 INFO L125 PetriNetUnfolderBase]: For 151321/151359 co-relation queries the response was YES. [2024-06-21 21:38:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31642 conditions, 5243 events. 3236/5243 cut-off events. For 151321/151359 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31922 event pairs, 709 based on Foata normal form. 49/5292 useless extension candidates. Maximal degree in co-relation 31544. Up to 4631 conditions per place. [2024-06-21 21:38:39,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 78 changer transitions 0/335 dead transitions. [2024-06-21 21:38:39,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 335 transitions, 4606 flow [2024-06-21 21:38:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:38:39,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:38:39,157 INFO L175 Difference]: Start difference. First operand has 209 places, 297 transitions, 3867 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:38:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 335 transitions, 4606 flow [2024-06-21 21:38:39,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 335 transitions, 4415 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:39,435 INFO L231 Difference]: Finished difference. Result has 210 places, 296 transitions, 3766 flow [2024-06-21 21:38:39,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3766, PETRI_PLACES=210, PETRI_TRANSITIONS=296} [2024-06-21 21:38:39,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 21:38:39,436 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 296 transitions, 3766 flow [2024-06-21 21:38:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:39,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:38:39,437 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:39,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2028066501, now seen corresponding path program 2 times [2024-06-21 21:38:39,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:39,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518867727] [2024-06-21 21:38:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:39,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:41,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:41,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518867727] [2024-06-21 21:38:41,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518867727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:41,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:41,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635755991] [2024-06-21 21:38:41,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:41,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:41,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 296 transitions, 3766 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:41,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:41,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:41,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:43,463 INFO L124 PetriNetUnfolderBase]: 3241/5257 cut-off events. [2024-06-21 21:38:43,464 INFO L125 PetriNetUnfolderBase]: For 146343/146363 co-relation queries the response was YES. [2024-06-21 21:38:43,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31630 conditions, 5257 events. 3241/5257 cut-off events. For 146343/146363 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32211 event pairs, 1126 based on Foata normal form. 21/5278 useless extension candidates. Maximal degree in co-relation 31531. Up to 5011 conditions per place. [2024-06-21 21:38:43,503 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 272 selfloop transitions, 42 changer transitions 0/318 dead transitions. [2024-06-21 21:38:43,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 318 transitions, 4570 flow [2024-06-21 21:38:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 21:38:43,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:38:43,505 INFO L175 Difference]: Start difference. First operand has 210 places, 296 transitions, 3766 flow. Second operand 6 states and 102 transitions. [2024-06-21 21:38:43,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 318 transitions, 4570 flow [2024-06-21 21:38:43,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 318 transitions, 4364 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:43,755 INFO L231 Difference]: Finished difference. Result has 210 places, 299 transitions, 3693 flow [2024-06-21 21:38:43,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3693, PETRI_PLACES=210, PETRI_TRANSITIONS=299} [2024-06-21 21:38:43,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 21:38:43,755 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 299 transitions, 3693 flow [2024-06-21 21:38:43,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:43,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:43,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:38:43,756 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:43,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2059761273, now seen corresponding path program 1 times [2024-06-21 21:38:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:43,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487833256] [2024-06-21 21:38:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:45,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:45,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487833256] [2024-06-21 21:38:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487833256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:45,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:45,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934333623] [2024-06-21 21:38:45,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:45,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:45,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:46,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:46,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 299 transitions, 3693 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:46,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:46,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:46,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:47,790 INFO L124 PetriNetUnfolderBase]: 3134/5112 cut-off events. [2024-06-21 21:38:47,791 INFO L125 PetriNetUnfolderBase]: For 151610/151770 co-relation queries the response was YES. [2024-06-21 21:38:47,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30523 conditions, 5112 events. 3134/5112 cut-off events. For 151610/151770 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31610 event pairs, 1091 based on Foata normal form. 143/5222 useless extension candidates. Maximal degree in co-relation 30423. Up to 4803 conditions per place. [2024-06-21 21:38:47,838 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 252 selfloop transitions, 38 changer transitions 0/313 dead transitions. [2024-06-21 21:38:47,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 313 transitions, 4333 flow [2024-06-21 21:38:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:38:47,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:38:47,839 INFO L175 Difference]: Start difference. First operand has 210 places, 299 transitions, 3693 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:38:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 313 transitions, 4333 flow [2024-06-21 21:38:48,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 313 transitions, 4258 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:48,104 INFO L231 Difference]: Finished difference. Result has 212 places, 302 transitions, 3740 flow [2024-06-21 21:38:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3740, PETRI_PLACES=212, PETRI_TRANSITIONS=302} [2024-06-21 21:38:48,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 21:38:48,105 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 302 transitions, 3740 flow [2024-06-21 21:38:48,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:48,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:48,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:38:48,106 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:48,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2028365031, now seen corresponding path program 3 times [2024-06-21 21:38:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846847120] [2024-06-21 21:38:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846847120] [2024-06-21 21:38:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846847120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:50,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248591632] [2024-06-21 21:38:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:50,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:50,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 302 transitions, 3740 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:50,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:50,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:51,883 INFO L124 PetriNetUnfolderBase]: 3258/5262 cut-off events. [2024-06-21 21:38:51,884 INFO L125 PetriNetUnfolderBase]: For 138576/138588 co-relation queries the response was YES. [2024-06-21 21:38:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31435 conditions, 5262 events. 3258/5262 cut-off events. For 138576/138588 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31879 event pairs, 830 based on Foata normal form. 4/5266 useless extension candidates. Maximal degree in co-relation 31335. Up to 5036 conditions per place. [2024-06-21 21:38:51,932 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 267 selfloop transitions, 42 changer transitions 0/313 dead transitions. [2024-06-21 21:38:51,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 313 transitions, 4397 flow [2024-06-21 21:38:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-21 21:38:51,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:38:51,933 INFO L175 Difference]: Start difference. First operand has 212 places, 302 transitions, 3740 flow. Second operand 6 states and 94 transitions. [2024-06-21 21:38:51,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 313 transitions, 4397 flow [2024-06-21 21:38:52,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 313 transitions, 4295 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:52,192 INFO L231 Difference]: Finished difference. Result has 214 places, 302 transitions, 3728 flow [2024-06-21 21:38:52,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3728, PETRI_PLACES=214, PETRI_TRANSITIONS=302} [2024-06-21 21:38:52,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 21:38:52,193 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 302 transitions, 3728 flow [2024-06-21 21:38:52,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:52,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:52,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:52,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:38:52,193 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:52,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash -97072357, now seen corresponding path program 2 times [2024-06-21 21:38:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:52,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075538933] [2024-06-21 21:38:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:54,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075538933] [2024-06-21 21:38:54,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075538933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:54,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:54,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615527799] [2024-06-21 21:38:54,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:54,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:54,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:54,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:54,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 302 transitions, 3728 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:54,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:54,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:54,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:56,475 INFO L124 PetriNetUnfolderBase]: 3119/5092 cut-off events. [2024-06-21 21:38:56,475 INFO L125 PetriNetUnfolderBase]: For 142797/142957 co-relation queries the response was YES. [2024-06-21 21:38:56,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30155 conditions, 5092 events. 3119/5092 cut-off events. For 142797/142957 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31484 event pairs, 1091 based on Foata normal form. 143/5202 useless extension candidates. Maximal degree in co-relation 30054. Up to 4770 conditions per place. [2024-06-21 21:38:56,517 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 41 changer transitions 0/318 dead transitions. [2024-06-21 21:38:56,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 318 transitions, 4384 flow [2024-06-21 21:38:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:38:56,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:38:56,519 INFO L175 Difference]: Start difference. First operand has 214 places, 302 transitions, 3728 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:38:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 318 transitions, 4384 flow [2024-06-21 21:38:56,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 318 transitions, 4286 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:56,784 INFO L231 Difference]: Finished difference. Result has 217 places, 305 transitions, 3754 flow [2024-06-21 21:38:56,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3754, PETRI_PLACES=217, PETRI_TRANSITIONS=305} [2024-06-21 21:38:56,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:38:56,785 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 305 transitions, 3754 flow [2024-06-21 21:38:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:56,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:56,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:38:56,786 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:56,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -274555231, now seen corresponding path program 1 times [2024-06-21 21:38:56,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:56,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011788678] [2024-06-21 21:38:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:56,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011788678] [2024-06-21 21:38:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011788678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:59,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:59,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027160954] [2024-06-21 21:38:59,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:59,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:59,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:59,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 305 transitions, 3754 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:59,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:59,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:59,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:00,879 INFO L124 PetriNetUnfolderBase]: 3147/5156 cut-off events. [2024-06-21 21:39:00,879 INFO L125 PetriNetUnfolderBase]: For 142688/142727 co-relation queries the response was YES. [2024-06-21 21:39:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30929 conditions, 5156 events. 3147/5156 cut-off events. For 142688/142727 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31691 event pairs, 1031 based on Foata normal form. 35/5181 useless extension candidates. Maximal degree in co-relation 30827. Up to 4897 conditions per place. [2024-06-21 21:39:00,921 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 33 changer transitions 0/322 dead transitions. [2024-06-21 21:39:00,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 322 transitions, 4470 flow [2024-06-21 21:39:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:39:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:39:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 21:39:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:39:00,923 INFO L175 Difference]: Start difference. First operand has 217 places, 305 transitions, 3754 flow. Second operand 6 states and 100 transitions. [2024-06-21 21:39:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 322 transitions, 4470 flow [2024-06-21 21:39:01,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 322 transitions, 4368 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:01,176 INFO L231 Difference]: Finished difference. Result has 218 places, 308 transitions, 3779 flow [2024-06-21 21:39:01,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3779, PETRI_PLACES=218, PETRI_TRANSITIONS=308} [2024-06-21 21:39:01,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 21:39:01,177 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 308 transitions, 3779 flow [2024-06-21 21:39:01,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:01,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:01,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:01,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:39:01,178 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:01,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1714709861, now seen corresponding path program 2 times [2024-06-21 21:39:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765564643] [2024-06-21 21:39:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765564643] [2024-06-21 21:39:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765564643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:03,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:39:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308961059] [2024-06-21 21:39:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:03,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:39:03,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:39:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:39:03,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:39:03,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 308 transitions, 3779 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:03,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:39:03,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:04,723 INFO L124 PetriNetUnfolderBase]: 3142/5160 cut-off events. [2024-06-21 21:39:04,723 INFO L125 PetriNetUnfolderBase]: For 147428/147467 co-relation queries the response was YES. [2024-06-21 21:39:04,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31106 conditions, 5160 events. 3142/5160 cut-off events. For 147428/147467 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31969 event pairs, 1154 based on Foata normal form. 28/5178 useless extension candidates. Maximal degree in co-relation 31003. Up to 4907 conditions per place. [2024-06-21 21:39:04,782 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 275 selfloop transitions, 35 changer transitions 0/321 dead transitions. [2024-06-21 21:39:04,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4483 flow [2024-06-21 21:39:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:39:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:39:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:39:04,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 21:39:04,784 INFO L175 Difference]: Start difference. First operand has 218 places, 308 transitions, 3779 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:39:04,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4483 flow [2024-06-21 21:39:05,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 321 transitions, 4380 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:05,025 INFO L231 Difference]: Finished difference. Result has 220 places, 311 transitions, 3813 flow [2024-06-21 21:39:05,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3813, PETRI_PLACES=220, PETRI_TRANSITIONS=311} [2024-06-21 21:39:05,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 21:39:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 311 transitions, 3813 flow [2024-06-21 21:39:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:05,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:05,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:05,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:39:05,027 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:05,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash -960094529, now seen corresponding path program 1 times [2024-06-21 21:39:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:05,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947242207] [2024-06-21 21:39:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947242207] [2024-06-21 21:39:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947242207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075753272] [2024-06-21 21:39:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:08,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:39:08,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 311 transitions, 3813 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:08,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:08,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:39:08,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:10,199 INFO L124 PetriNetUnfolderBase]: 3101/5063 cut-off events. [2024-06-21 21:39:10,199 INFO L125 PetriNetUnfolderBase]: For 156814/156994 co-relation queries the response was YES. [2024-06-21 21:39:10,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30600 conditions, 5063 events. 3101/5063 cut-off events. For 156814/156994 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31532 event pairs, 1643 based on Foata normal form. 149/5180 useless extension candidates. Maximal degree in co-relation 30496. Up to 4831 conditions per place. [2024-06-21 21:39:10,244 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 284 selfloop transitions, 19 changer transitions 0/326 dead transitions. [2024-06-21 21:39:10,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 326 transitions, 4473 flow [2024-06-21 21:39:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 21:39:10,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-21 21:39:10,245 INFO L175 Difference]: Start difference. First operand has 220 places, 311 transitions, 3813 flow. Second operand 8 states and 117 transitions. [2024-06-21 21:39:10,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 326 transitions, 4473 flow [2024-06-21 21:39:10,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 326 transitions, 4360 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:10,511 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 3765 flow [2024-06-21 21:39:10,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3765, PETRI_PLACES=224, PETRI_TRANSITIONS=313} [2024-06-21 21:39:10,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 21:39:10,512 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 3765 flow [2024-06-21 21:39:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:10,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:10,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:10,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:39:10,512 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:10,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -163541318, now seen corresponding path program 1 times [2024-06-21 21:39:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:10,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115930058] [2024-06-21 21:39:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115930058] [2024-06-21 21:39:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115930058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498786083] [2024-06-21 21:39:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:12,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:12,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 313 transitions, 3765 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:12,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:12,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:12,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:14,642 INFO L124 PetriNetUnfolderBase]: 3266/5295 cut-off events. [2024-06-21 21:39:14,642 INFO L125 PetriNetUnfolderBase]: For 156637/156649 co-relation queries the response was YES. [2024-06-21 21:39:14,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 5295 events. 3266/5295 cut-off events. For 156637/156649 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32480 event pairs, 1115 based on Foata normal form. 14/5309 useless extension candidates. Maximal degree in co-relation 31945. Up to 5021 conditions per place. [2024-06-21 21:39:14,696 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 54 changer transitions 0/361 dead transitions. [2024-06-21 21:39:14,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 361 transitions, 4762 flow [2024-06-21 21:39:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 21:39:14,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 21:39:14,698 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 3765 flow. Second operand 11 states and 174 transitions. [2024-06-21 21:39:14,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 361 transitions, 4762 flow [2024-06-21 21:39:15,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 361 transitions, 4674 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:15,026 INFO L231 Difference]: Finished difference. Result has 230 places, 322 transitions, 3885 flow [2024-06-21 21:39:15,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3885, PETRI_PLACES=230, PETRI_TRANSITIONS=322} [2024-06-21 21:39:15,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 21:39:15,027 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 322 transitions, 3885 flow [2024-06-21 21:39:15,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:15,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:15,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:15,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:39:15,028 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:15,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2071142592, now seen corresponding path program 2 times [2024-06-21 21:39:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859753747] [2024-06-21 21:39:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:17,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:17,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859753747] [2024-06-21 21:39:17,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859753747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:17,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:17,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:17,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419073977] [2024-06-21 21:39:17,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:17,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:17,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:17,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:17,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 322 transitions, 3885 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:17,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:17,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:17,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:19,920 INFO L124 PetriNetUnfolderBase]: 3332/5378 cut-off events. [2024-06-21 21:39:19,920 INFO L125 PetriNetUnfolderBase]: For 166346/166358 co-relation queries the response was YES. [2024-06-21 21:39:19,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33097 conditions, 5378 events. 3332/5378 cut-off events. For 166346/166358 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32827 event pairs, 837 based on Foata normal form. 14/5392 useless extension candidates. Maximal degree in co-relation 32991. Up to 5076 conditions per place. [2024-06-21 21:39:19,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 75 changer transitions 0/386 dead transitions. [2024-06-21 21:39:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 386 transitions, 5197 flow [2024-06-21 21:39:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:39:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:39:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-21 21:39:19,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-21 21:39:19,969 INFO L175 Difference]: Start difference. First operand has 230 places, 322 transitions, 3885 flow. Second operand 12 states and 190 transitions. [2024-06-21 21:39:19,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 386 transitions, 5197 flow [2024-06-21 21:39:20,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 386 transitions, 5045 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:20,349 INFO L231 Difference]: Finished difference. Result has 240 places, 347 transitions, 4213 flow [2024-06-21 21:39:20,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3795, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4213, PETRI_PLACES=240, PETRI_TRANSITIONS=347} [2024-06-21 21:39:20,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 21:39:20,349 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 347 transitions, 4213 flow [2024-06-21 21:39:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:20,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:20,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:20,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:39:20,350 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:20,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:20,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1241298304, now seen corresponding path program 3 times [2024-06-21 21:39:20,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74740914] [2024-06-21 21:39:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:20,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:22,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:22,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74740914] [2024-06-21 21:39:22,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74740914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:22,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:22,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385705261] [2024-06-21 21:39:22,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:22,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:22,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:22,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:22,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 347 transitions, 4213 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:22,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:22,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:22,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:24,925 INFO L124 PetriNetUnfolderBase]: 3368/5430 cut-off events. [2024-06-21 21:39:24,925 INFO L125 PetriNetUnfolderBase]: For 176600/176610 co-relation queries the response was YES. [2024-06-21 21:39:24,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33759 conditions, 5430 events. 3368/5430 cut-off events. For 176600/176610 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32973 event pairs, 821 based on Foata normal form. 6/5436 useless extension candidates. Maximal degree in co-relation 33648. Up to 5105 conditions per place. [2024-06-21 21:39:24,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 87 changer transitions 0/377 dead transitions. [2024-06-21 21:39:24,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 377 transitions, 5309 flow [2024-06-21 21:39:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 21:39:24,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-21 21:39:24,983 INFO L175 Difference]: Start difference. First operand has 240 places, 347 transitions, 4213 flow. Second operand 9 states and 134 transitions. [2024-06-21 21:39:24,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 377 transitions, 5309 flow [2024-06-21 21:39:25,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 377 transitions, 5191 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:25,354 INFO L231 Difference]: Finished difference. Result has 246 places, 359 transitions, 4441 flow [2024-06-21 21:39:25,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4441, PETRI_PLACES=246, PETRI_TRANSITIONS=359} [2024-06-21 21:39:25,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 21:39:25,355 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 359 transitions, 4441 flow [2024-06-21 21:39:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:25,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:25,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:39:25,355 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:25,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash -603189400, now seen corresponding path program 4 times [2024-06-21 21:39:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575810787] [2024-06-21 21:39:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575810787] [2024-06-21 21:39:27,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575810787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:27,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:27,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:27,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045412544] [2024-06-21 21:39:27,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:27,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:27,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 359 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:27,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:27,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:27,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:29,917 INFO L124 PetriNetUnfolderBase]: 3356/5414 cut-off events. [2024-06-21 21:39:29,917 INFO L125 PetriNetUnfolderBase]: For 179514/179524 co-relation queries the response was YES. [2024-06-21 21:39:29,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33726 conditions, 5414 events. 3356/5414 cut-off events. For 179514/179524 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32951 event pairs, 821 based on Foata normal form. 6/5420 useless extension candidates. Maximal degree in co-relation 33614. Up to 5095 conditions per place. [2024-06-21 21:39:29,965 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 85 changer transitions 0/373 dead transitions. [2024-06-21 21:39:29,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 373 transitions, 5307 flow [2024-06-21 21:39:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:39:29,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 21:39:29,966 INFO L175 Difference]: Start difference. First operand has 246 places, 359 transitions, 4441 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:39:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 373 transitions, 5307 flow [2024-06-21 21:39:30,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 373 transitions, 5100 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:30,257 INFO L231 Difference]: Finished difference. Result has 247 places, 359 transitions, 4414 flow [2024-06-21 21:39:30,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4414, PETRI_PLACES=247, PETRI_TRANSITIONS=359} [2024-06-21 21:39:30,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 21:39:30,257 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 359 transitions, 4414 flow [2024-06-21 21:39:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:30,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:30,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:39:30,258 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:30,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1138838018, now seen corresponding path program 5 times [2024-06-21 21:39:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153980933] [2024-06-21 21:39:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153980933] [2024-06-21 21:39:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153980933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:32,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:32,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994447495] [2024-06-21 21:39:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:32,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:32,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:32,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:32,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 359 transitions, 4414 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:32,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:32,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:32,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:34,693 INFO L124 PetriNetUnfolderBase]: 3350/5425 cut-off events. [2024-06-21 21:39:34,694 INFO L125 PetriNetUnfolderBase]: For 182080/182098 co-relation queries the response was YES. [2024-06-21 21:39:34,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33631 conditions, 5425 events. 3350/5425 cut-off events. For 182080/182098 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33304 event pairs, 1117 based on Foata normal form. 20/5445 useless extension candidates. Maximal degree in co-relation 33519. Up to 5090 conditions per place. [2024-06-21 21:39:34,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 87 changer transitions 0/382 dead transitions. [2024-06-21 21:39:34,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 382 transitions, 5236 flow [2024-06-21 21:39:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 21:39:34,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:39:34,754 INFO L175 Difference]: Start difference. First operand has 247 places, 359 transitions, 4414 flow. Second operand 9 states and 138 transitions. [2024-06-21 21:39:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 382 transitions, 5236 flow [2024-06-21 21:39:35,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 382 transitions, 5048 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:35,154 INFO L231 Difference]: Finished difference. Result has 250 places, 359 transitions, 4418 flow [2024-06-21 21:39:35,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4418, PETRI_PLACES=250, PETRI_TRANSITIONS=359} [2024-06-21 21:39:35,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 21:39:35,155 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 359 transitions, 4418 flow [2024-06-21 21:39:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:35,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:35,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:39:35,155 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:35,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash 297217998, now seen corresponding path program 6 times [2024-06-21 21:39:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:35,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249625245] [2024-06-21 21:39:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:37,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249625245] [2024-06-21 21:39:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249625245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:37,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:37,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706591163] [2024-06-21 21:39:37,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:37,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:37,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:37,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 359 transitions, 4418 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:37,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:37,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:37,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:39,938 INFO L124 PetriNetUnfolderBase]: 3344/5398 cut-off events. [2024-06-21 21:39:39,938 INFO L125 PetriNetUnfolderBase]: For 185143/185153 co-relation queries the response was YES. [2024-06-21 21:39:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33629 conditions, 5398 events. 3344/5398 cut-off events. For 185143/185153 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32785 event pairs, 824 based on Foata normal form. 4/5402 useless extension candidates. Maximal degree in co-relation 33516. Up to 5066 conditions per place. [2024-06-21 21:39:39,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 89 changer transitions 0/380 dead transitions. [2024-06-21 21:39:39,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 380 transitions, 5268 flow [2024-06-21 21:39:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:39:39,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 21:39:39,991 INFO L175 Difference]: Start difference. First operand has 250 places, 359 transitions, 4418 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:39:39,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 380 transitions, 5268 flow [2024-06-21 21:39:40,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 380 transitions, 5074 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:40,346 INFO L231 Difference]: Finished difference. Result has 250 places, 365 transitions, 4480 flow [2024-06-21 21:39:40,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4480, PETRI_PLACES=250, PETRI_TRANSITIONS=365} [2024-06-21 21:39:40,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 21:39:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 365 transitions, 4480 flow [2024-06-21 21:39:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:40,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:40,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:39:40,347 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 78633565, now seen corresponding path program 1 times [2024-06-21 21:39:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434878098] [2024-06-21 21:39:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:43,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434878098] [2024-06-21 21:39:43,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434878098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:43,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:43,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:43,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496060057] [2024-06-21 21:39:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:43,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:43,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:43,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:39:43,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 365 transitions, 4480 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:43,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:43,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:39:43,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:44,806 INFO L124 PetriNetUnfolderBase]: 3280/5360 cut-off events. [2024-06-21 21:39:44,806 INFO L125 PetriNetUnfolderBase]: For 182818/182856 co-relation queries the response was YES. [2024-06-21 21:39:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33611 conditions, 5360 events. 3280/5360 cut-off events. For 182818/182856 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33252 event pairs, 1162 based on Foata normal form. 34/5382 useless extension candidates. Maximal degree in co-relation 33498. Up to 4999 conditions per place. [2024-06-21 21:39:44,864 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 335 selfloop transitions, 43 changer transitions 0/391 dead transitions. [2024-06-21 21:39:44,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 391 transitions, 5470 flow [2024-06-21 21:39:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:39:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 21:39:44,866 INFO L175 Difference]: Start difference. First operand has 250 places, 365 transitions, 4480 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:39:44,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 391 transitions, 5470 flow [2024-06-21 21:39:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 391 transitions, 5325 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:45,171 INFO L231 Difference]: Finished difference. Result has 253 places, 371 transitions, 4509 flow [2024-06-21 21:39:45,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=253, PETRI_TRANSITIONS=371} [2024-06-21 21:39:45,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 21:39:45,172 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 371 transitions, 4509 flow [2024-06-21 21:39:45,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:45,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:45,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:45,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:39:45,173 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:45,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash 670689148, now seen corresponding path program 1 times [2024-06-21 21:39:45,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:45,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019767725] [2024-06-21 21:39:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:48,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:48,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019767725] [2024-06-21 21:39:48,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019767725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:48,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:48,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255747855] [2024-06-21 21:39:48,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:48,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:48,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 371 transitions, 4509 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 21:39:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:50,382 INFO L124 PetriNetUnfolderBase]: 3388/5487 cut-off events. [2024-06-21 21:39:50,382 INFO L125 PetriNetUnfolderBase]: For 191826/191828 co-relation queries the response was YES. [2024-06-21 21:39:50,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34949 conditions, 5487 events. 3388/5487 cut-off events. For 191826/191828 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33981 event pairs, 1742 based on Foata normal form. 4/5491 useless extension candidates. Maximal degree in co-relation 34834. Up to 5270 conditions per place. [2024-06-21 21:39:50,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 25 changer transitions 0/407 dead transitions. [2024-06-21 21:39:50,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 407 transitions, 5643 flow [2024-06-21 21:39:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:39:50,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 21:39:50,444 INFO L175 Difference]: Start difference. First operand has 253 places, 371 transitions, 4509 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:39:50,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 407 transitions, 5643 flow [2024-06-21 21:39:50,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 407 transitions, 5563 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 21:39:50,856 INFO L231 Difference]: Finished difference. Result has 260 places, 387 transitions, 4702 flow [2024-06-21 21:39:50,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4702, PETRI_PLACES=260, PETRI_TRANSITIONS=387} [2024-06-21 21:39:50,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 21:39:50,857 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 387 transitions, 4702 flow [2024-06-21 21:39:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 21:39:50,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:50,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:39:50,858 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:50,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:50,858 INFO L85 PathProgramCache]: Analyzing trace with hash 670688993, now seen corresponding path program 2 times [2024-06-21 21:39:50,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:50,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112931317] [2024-06-21 21:39:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:54,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:54,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112931317] [2024-06-21 21:39:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112931317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220306046] [2024-06-21 21:39:54,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:54,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:39:54,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 387 transitions, 4702 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:54,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:54,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:39:54,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:55,702 INFO L124 PetriNetUnfolderBase]: 3317/5406 cut-off events. [2024-06-21 21:39:55,703 INFO L125 PetriNetUnfolderBase]: For 195856/195892 co-relation queries the response was YES. [2024-06-21 21:39:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 5406 events. 3317/5406 cut-off events. For 195856/195892 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 33546 event pairs, 1161 based on Foata normal form. 36/5438 useless extension candidates. Maximal degree in co-relation 34798. Up to 5036 conditions per place. [2024-06-21 21:39:55,768 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-21 21:39:55,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 405 transitions, 5568 flow [2024-06-21 21:39:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:39:55,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 21:39:55,769 INFO L175 Difference]: Start difference. First operand has 260 places, 387 transitions, 4702 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:39:55,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 405 transitions, 5568 flow [2024-06-21 21:39:56,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 405 transitions, 5512 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-21 21:39:56,154 INFO L231 Difference]: Finished difference. Result has 266 places, 390 transitions, 4793 flow [2024-06-21 21:39:56,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4793, PETRI_PLACES=266, PETRI_TRANSITIONS=390} [2024-06-21 21:39:56,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 21:39:56,155 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 390 transitions, 4793 flow [2024-06-21 21:39:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:56,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:56,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:56,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:39:56,156 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:56,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1647685768, now seen corresponding path program 2 times [2024-06-21 21:39:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426888205] [2024-06-21 21:39:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:58,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426888205] [2024-06-21 21:39:58,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426888205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:58,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:58,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:58,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619457708] [2024-06-21 21:39:58,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:58,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:58,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 390 transitions, 4793 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:58,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:58,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:58,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:00,159 INFO L124 PetriNetUnfolderBase]: 3392/5494 cut-off events. [2024-06-21 21:40:00,159 INFO L125 PetriNetUnfolderBase]: For 204556/204560 co-relation queries the response was YES. [2024-06-21 21:40:00,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36099 conditions, 5494 events. 3392/5494 cut-off events. For 204556/204560 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34072 event pairs, 1740 based on Foata normal form. 6/5500 useless extension candidates. Maximal degree in co-relation 35976. Up to 5304 conditions per place. [2024-06-21 21:40:00,215 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 20 changer transitions 0/406 dead transitions. [2024-06-21 21:40:00,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 406 transitions, 5689 flow [2024-06-21 21:40:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:40:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:40:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 21:40:00,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:40:00,216 INFO L175 Difference]: Start difference. First operand has 266 places, 390 transitions, 4793 flow. Second operand 7 states and 105 transitions. [2024-06-21 21:40:00,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 406 transitions, 5689 flow [2024-06-21 21:40:00,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 406 transitions, 5566 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:00,793 INFO L231 Difference]: Finished difference. Result has 268 places, 393 transitions, 4771 flow [2024-06-21 21:40:00,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4771, PETRI_PLACES=268, PETRI_TRANSITIONS=393} [2024-06-21 21:40:00,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 21:40:00,794 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 393 transitions, 4771 flow [2024-06-21 21:40:00,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:00,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:00,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:00,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:40:00,795 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:00,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 674408218, now seen corresponding path program 3 times [2024-06-21 21:40:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965743316] [2024-06-21 21:40:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:03,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965743316] [2024-06-21 21:40:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965743316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:03,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064636995] [2024-06-21 21:40:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:03,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:03,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 393 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:03,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:03,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:03,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:04,952 INFO L124 PetriNetUnfolderBase]: 3386/5487 cut-off events. [2024-06-21 21:40:04,952 INFO L125 PetriNetUnfolderBase]: For 208009/208013 co-relation queries the response was YES. [2024-06-21 21:40:05,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35951 conditions, 5487 events. 3386/5487 cut-off events. For 208009/208013 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33965 event pairs, 1739 based on Foata normal form. 6/5493 useless extension candidates. Maximal degree in co-relation 35827. Up to 5287 conditions per place. [2024-06-21 21:40:05,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 24 changer transitions 0/410 dead transitions. [2024-06-21 21:40:05,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 410 transitions, 5653 flow [2024-06-21 21:40:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:40:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:40:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 21:40:05,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 21:40:05,027 INFO L175 Difference]: Start difference. First operand has 268 places, 393 transitions, 4771 flow. Second operand 7 states and 107 transitions. [2024-06-21 21:40:05,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 410 transitions, 5653 flow [2024-06-21 21:40:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 410 transitions, 5543 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:05,463 INFO L231 Difference]: Finished difference. Result has 271 places, 396 transitions, 4750 flow [2024-06-21 21:40:05,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4750, PETRI_PLACES=271, PETRI_TRANSITIONS=396} [2024-06-21 21:40:05,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 21:40:05,463 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 396 transitions, 4750 flow [2024-06-21 21:40:05,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:05,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:05,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:40:05,464 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:05,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 674408063, now seen corresponding path program 3 times [2024-06-21 21:40:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274756159] [2024-06-21 21:40:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274756159] [2024-06-21 21:40:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274756159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:08,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:08,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335031532] [2024-06-21 21:40:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:08,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:40:08,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 396 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:08,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:08,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:40:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:10,402 INFO L124 PetriNetUnfolderBase]: 3356/5455 cut-off events. [2024-06-21 21:40:10,402 INFO L125 PetriNetUnfolderBase]: For 210480/210496 co-relation queries the response was YES. [2024-06-21 21:40:10,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35802 conditions, 5455 events. 3356/5455 cut-off events. For 210480/210496 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33670 event pairs, 1139 based on Foata normal form. 17/5468 useless extension candidates. Maximal degree in co-relation 35677. Up to 5122 conditions per place. [2024-06-21 21:40:10,465 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 51 changer transitions 0/425 dead transitions. [2024-06-21 21:40:10,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 425 transitions, 5744 flow [2024-06-21 21:40:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 21:40:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-21 21:40:10,467 INFO L175 Difference]: Start difference. First operand has 271 places, 396 transitions, 4750 flow. Second operand 9 states and 134 transitions. [2024-06-21 21:40:10,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 425 transitions, 5744 flow [2024-06-21 21:40:10,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 425 transitions, 5715 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:40:10,973 INFO L231 Difference]: Finished difference. Result has 278 places, 409 transitions, 4989 flow [2024-06-21 21:40:10,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4989, PETRI_PLACES=278, PETRI_TRANSITIONS=409} [2024-06-21 21:40:10,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 21:40:10,974 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 409 transitions, 4989 flow [2024-06-21 21:40:10,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:10,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:10,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:10,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:40:10,975 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:10,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash 290045311, now seen corresponding path program 4 times [2024-06-21 21:40:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:10,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372875647] [2024-06-21 21:40:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372875647] [2024-06-21 21:40:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372875647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:13,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:13,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:13,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229025774] [2024-06-21 21:40:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:13,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:40:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 409 transitions, 4989 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:40:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:15,559 INFO L124 PetriNetUnfolderBase]: 3348/5449 cut-off events. [2024-06-21 21:40:15,560 INFO L125 PetriNetUnfolderBase]: For 215010/215040 co-relation queries the response was YES. [2024-06-21 21:40:15,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35943 conditions, 5449 events. 3348/5449 cut-off events. For 215010/215040 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33759 event pairs, 1155 based on Foata normal form. 23/5468 useless extension candidates. Maximal degree in co-relation 35815. Up to 5116 conditions per place. [2024-06-21 21:40:15,612 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 50 changer transitions 0/421 dead transitions. [2024-06-21 21:40:15,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 421 transitions, 5823 flow [2024-06-21 21:40:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:40:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:40:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:40:15,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 21:40:15,614 INFO L175 Difference]: Start difference. First operand has 278 places, 409 transitions, 4989 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:40:15,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 421 transitions, 5823 flow [2024-06-21 21:40:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 421 transitions, 5687 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:40:16,063 INFO L231 Difference]: Finished difference. Result has 282 places, 409 transitions, 4960 flow [2024-06-21 21:40:16,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4960, PETRI_PLACES=282, PETRI_TRANSITIONS=409} [2024-06-21 21:40:16,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:40:16,064 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 409 transitions, 4960 flow [2024-06-21 21:40:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:16,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:16,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:16,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:40:16,064 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:16,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1070329730, now seen corresponding path program 1 times [2024-06-21 21:40:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:16,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423423224] [2024-06-21 21:40:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:18,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423423224] [2024-06-21 21:40:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423423224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:18,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417688516] [2024-06-21 21:40:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:18,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:18,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:18,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 409 transitions, 4960 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:18,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:18,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:18,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:20,027 INFO L124 PetriNetUnfolderBase]: 3431/5539 cut-off events. [2024-06-21 21:40:20,027 INFO L125 PetriNetUnfolderBase]: For 224837/224845 co-relation queries the response was YES. [2024-06-21 21:40:20,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36647 conditions, 5539 events. 3431/5539 cut-off events. For 224837/224845 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34151 event pairs, 1089 based on Foata normal form. 10/5549 useless extension candidates. Maximal degree in co-relation 36519. Up to 5205 conditions per place. [2024-06-21 21:40:20,094 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 62 changer transitions 0/454 dead transitions. [2024-06-21 21:40:20,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 454 transitions, 6142 flow [2024-06-21 21:40:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:40:20,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:40:20,095 INFO L175 Difference]: Start difference. First operand has 282 places, 409 transitions, 4960 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:40:20,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 454 transitions, 6142 flow [2024-06-21 21:40:20,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 454 transitions, 6001 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:20,689 INFO L231 Difference]: Finished difference. Result has 284 places, 413 transitions, 5005 flow [2024-06-21 21:40:20,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5005, PETRI_PLACES=284, PETRI_TRANSITIONS=413} [2024-06-21 21:40:20,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:40:20,689 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 413 transitions, 5005 flow [2024-06-21 21:40:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:20,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:20,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:20,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:40:20,690 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:20,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 9530074, now seen corresponding path program 2 times [2024-06-21 21:40:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:20,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698135594] [2024-06-21 21:40:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:20,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698135594] [2024-06-21 21:40:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698135594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:23,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:23,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122200486] [2024-06-21 21:40:23,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:23,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:23,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 413 transitions, 5005 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:23,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:23,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:23,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:24,952 INFO L124 PetriNetUnfolderBase]: 3426/5532 cut-off events. [2024-06-21 21:40:24,953 INFO L125 PetriNetUnfolderBase]: For 229396/229404 co-relation queries the response was YES. [2024-06-21 21:40:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36769 conditions, 5532 events. 3426/5532 cut-off events. For 229396/229404 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34049 event pairs, 1114 based on Foata normal form. 10/5542 useless extension candidates. Maximal degree in co-relation 36641. Up to 5261 conditions per place. [2024-06-21 21:40:25,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 59 changer transitions 0/446 dead transitions. [2024-06-21 21:40:25,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 446 transitions, 5989 flow [2024-06-21 21:40:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:40:25,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 21:40:25,171 INFO L175 Difference]: Start difference. First operand has 284 places, 413 transitions, 5005 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:40:25,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 446 transitions, 5989 flow [2024-06-21 21:40:25,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 446 transitions, 5880 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:25,761 INFO L231 Difference]: Finished difference. Result has 288 places, 413 transitions, 5020 flow [2024-06-21 21:40:25,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5020, PETRI_PLACES=288, PETRI_TRANSITIONS=413} [2024-06-21 21:40:25,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:40:25,761 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 413 transitions, 5020 flow [2024-06-21 21:40:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:25,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:25,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:40:25,762 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:25,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash -113180192, now seen corresponding path program 3 times [2024-06-21 21:40:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209814971] [2024-06-21 21:40:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209814971] [2024-06-21 21:40:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209814971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:27,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769447173] [2024-06-21 21:40:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:27,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:27,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 413 transitions, 5020 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:27,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:27,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:27,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:29,660 INFO L124 PetriNetUnfolderBase]: 3442/5555 cut-off events. [2024-06-21 21:40:29,661 INFO L125 PetriNetUnfolderBase]: For 236473/236481 co-relation queries the response was YES. [2024-06-21 21:40:29,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37088 conditions, 5555 events. 3442/5555 cut-off events. For 236473/236481 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34057 event pairs, 865 based on Foata normal form. 10/5565 useless extension candidates. Maximal degree in co-relation 36958. Up to 5122 conditions per place. [2024-06-21 21:40:29,726 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 69 changer transitions 0/460 dead transitions. [2024-06-21 21:40:29,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 460 transitions, 6240 flow [2024-06-21 21:40:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:40:29,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:40:29,728 INFO L175 Difference]: Start difference. First operand has 288 places, 413 transitions, 5020 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:40:29,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 460 transitions, 6240 flow [2024-06-21 21:40:30,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 460 transitions, 6136 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:40:30,303 INFO L231 Difference]: Finished difference. Result has 292 places, 420 transitions, 5167 flow [2024-06-21 21:40:30,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5167, PETRI_PLACES=292, PETRI_TRANSITIONS=420} [2024-06-21 21:40:30,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 21:40:30,304 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 420 transitions, 5167 flow [2024-06-21 21:40:30,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:30,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:30,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:30,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:40:30,305 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:30,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash 804244642, now seen corresponding path program 1 times [2024-06-21 21:40:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827680655] [2024-06-21 21:40:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827680655] [2024-06-21 21:40:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827680655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:32,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465568270] [2024-06-21 21:40:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:32,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:32,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 420 transitions, 5167 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:32,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:32,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:32,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:34,262 INFO L124 PetriNetUnfolderBase]: 3463/5577 cut-off events. [2024-06-21 21:40:34,262 INFO L125 PetriNetUnfolderBase]: For 247150/247171 co-relation queries the response was YES. [2024-06-21 21:40:34,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37858 conditions, 5577 events. 3463/5577 cut-off events. For 247150/247171 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34265 event pairs, 805 based on Foata normal form. 22/5599 useless extension candidates. Maximal degree in co-relation 37726. Up to 5096 conditions per place. [2024-06-21 21:40:34,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 107 changer transitions 0/471 dead transitions. [2024-06-21 21:40:34,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 471 transitions, 6789 flow [2024-06-21 21:40:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:40:34,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:40:34,332 INFO L175 Difference]: Start difference. First operand has 292 places, 420 transitions, 5167 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:40:34,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 471 transitions, 6789 flow [2024-06-21 21:40:34,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 471 transitions, 6663 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:34,905 INFO L231 Difference]: Finished difference. Result has 296 places, 432 transitions, 5501 flow [2024-06-21 21:40:34,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5501, PETRI_PLACES=296, PETRI_TRANSITIONS=432} [2024-06-21 21:40:34,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 21:40:34,906 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 432 transitions, 5501 flow [2024-06-21 21:40:34,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:34,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:34,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:34,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:40:34,907 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:34,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2061577772, now seen corresponding path program 2 times [2024-06-21 21:40:34,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:34,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622712521] [2024-06-21 21:40:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:34,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:36,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622712521] [2024-06-21 21:40:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622712521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:36,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:36,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705077825] [2024-06-21 21:40:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:36,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:36,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:36,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 432 transitions, 5501 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:36,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:36,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:36,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:39,008 INFO L124 PetriNetUnfolderBase]: 3460/5576 cut-off events. [2024-06-21 21:40:39,008 INFO L125 PetriNetUnfolderBase]: For 254503/254524 co-relation queries the response was YES. [2024-06-21 21:40:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38295 conditions, 5576 events. 3460/5576 cut-off events. For 254503/254524 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 34323 event pairs, 813 based on Foata normal form. 22/5598 useless extension candidates. Maximal degree in co-relation 38161. Up to 5093 conditions per place. [2024-06-21 21:40:39,075 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 111 changer transitions 0/466 dead transitions. [2024-06-21 21:40:39,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 466 transitions, 6755 flow [2024-06-21 21:40:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:40:39,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:40:39,077 INFO L175 Difference]: Start difference. First operand has 296 places, 432 transitions, 5501 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:40:39,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 466 transitions, 6755 flow [2024-06-21 21:40:39,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 466 transitions, 6607 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:40:39,710 INFO L231 Difference]: Finished difference. Result has 301 places, 432 transitions, 5582 flow [2024-06-21 21:40:39,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5353, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5582, PETRI_PLACES=301, PETRI_TRANSITIONS=432} [2024-06-21 21:40:39,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 21:40:39,711 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 432 transitions, 5582 flow [2024-06-21 21:40:39,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:39,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:39,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:40:39,711 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:39,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -227669350, now seen corresponding path program 4 times [2024-06-21 21:40:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:39,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275767284] [2024-06-21 21:40:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:42,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275767284] [2024-06-21 21:40:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275767284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:42,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:42,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401924292] [2024-06-21 21:40:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:42,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:42,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:42,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:42,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 432 transitions, 5582 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:42,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:42,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:42,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:44,137 INFO L124 PetriNetUnfolderBase]: 3555/5721 cut-off events. [2024-06-21 21:40:44,137 INFO L125 PetriNetUnfolderBase]: For 268631/268639 co-relation queries the response was YES. [2024-06-21 21:40:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39459 conditions, 5721 events. 3555/5721 cut-off events. For 268631/268639 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35276 event pairs, 839 based on Foata normal form. 10/5731 useless extension candidates. Maximal degree in co-relation 39325. Up to 5368 conditions per place. [2024-06-21 21:40:44,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 68 changer transitions 0/487 dead transitions. [2024-06-21 21:40:44,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 487 transitions, 6958 flow [2024-06-21 21:40:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:40:44,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:40:44,207 INFO L175 Difference]: Start difference. First operand has 301 places, 432 transitions, 5582 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:40:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 487 transitions, 6958 flow [2024-06-21 21:40:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 487 transitions, 6730 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:44,841 INFO L231 Difference]: Finished difference. Result has 304 places, 448 transitions, 5723 flow [2024-06-21 21:40:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5723, PETRI_PLACES=304, PETRI_TRANSITIONS=448} [2024-06-21 21:40:44,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:40:44,842 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 448 transitions, 5723 flow [2024-06-21 21:40:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:40:44,842 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash -219098470, now seen corresponding path program 5 times [2024-06-21 21:40:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853663978] [2024-06-21 21:40:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:47,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:47,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853663978] [2024-06-21 21:40:47,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853663978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:47,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:47,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517196488] [2024-06-21 21:40:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:47,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:47,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:47,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 448 transitions, 5723 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:47,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:47,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:47,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:49,274 INFO L124 PetriNetUnfolderBase]: 3571/5760 cut-off events. [2024-06-21 21:40:49,274 INFO L125 PetriNetUnfolderBase]: For 281017/281031 co-relation queries the response was YES. [2024-06-21 21:40:49,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39795 conditions, 5760 events. 3571/5760 cut-off events. For 281017/281031 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35617 event pairs, 1146 based on Foata normal form. 18/5778 useless extension candidates. Maximal degree in co-relation 39659. Up to 5467 conditions per place. [2024-06-21 21:40:49,346 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 405 selfloop transitions, 62 changer transitions 0/471 dead transitions. [2024-06-21 21:40:49,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 471 transitions, 6773 flow [2024-06-21 21:40:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:40:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:40:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:40:49,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:40:49,347 INFO L175 Difference]: Start difference. First operand has 304 places, 448 transitions, 5723 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:40:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 471 transitions, 6773 flow [2024-06-21 21:40:50,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 471 transitions, 6700 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:50,151 INFO L231 Difference]: Finished difference. Result has 306 places, 452 transitions, 5854 flow [2024-06-21 21:40:50,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5854, PETRI_PLACES=306, PETRI_TRANSITIONS=452} [2024-06-21 21:40:50,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 21:40:50,151 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 452 transitions, 5854 flow [2024-06-21 21:40:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:50,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:50,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:50,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:40:50,152 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:50,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -549660508, now seen corresponding path program 6 times [2024-06-21 21:40:50,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:50,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352455557] [2024-06-21 21:40:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:50,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:52,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:52,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352455557] [2024-06-21 21:40:52,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352455557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:52,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:52,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:52,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853417899] [2024-06-21 21:40:52,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:52,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:52,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 452 transitions, 5854 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:52,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:52,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:52,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:54,556 INFO L124 PetriNetUnfolderBase]: 3574/5744 cut-off events. [2024-06-21 21:40:54,556 INFO L125 PetriNetUnfolderBase]: For 284514/284522 co-relation queries the response was YES. [2024-06-21 21:40:54,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40035 conditions, 5744 events. 3574/5744 cut-off events. For 284514/284522 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35148 event pairs, 840 based on Foata normal form. 5/5749 useless extension candidates. Maximal degree in co-relation 39897. Up to 5484 conditions per place. [2024-06-21 21:40:54,617 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 404 selfloop transitions, 58 changer transitions 0/466 dead transitions. [2024-06-21 21:40:54,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 466 transitions, 6844 flow [2024-06-21 21:40:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:40:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:40:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 21:40:54,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:40:54,618 INFO L175 Difference]: Start difference. First operand has 306 places, 452 transitions, 5854 flow. Second operand 7 states and 105 transitions. [2024-06-21 21:40:54,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 466 transitions, 6844 flow [2024-06-21 21:40:55,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 466 transitions, 6696 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:40:55,305 INFO L231 Difference]: Finished difference. Result has 307 places, 454 transitions, 5866 flow [2024-06-21 21:40:55,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5866, PETRI_PLACES=307, PETRI_TRANSITIONS=454} [2024-06-21 21:40:55,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 21:40:55,306 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 454 transitions, 5866 flow [2024-06-21 21:40:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:55,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:55,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:40:55,307 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -52631236, now seen corresponding path program 3 times [2024-06-21 21:40:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614961360] [2024-06-21 21:40:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614961360] [2024-06-21 21:40:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614961360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:57,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:57,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:40:57,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467858757] [2024-06-21 21:40:57,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:40:57,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:40:57,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:40:57,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:57,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 454 transitions, 5866 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:57,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:57,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:59,700 INFO L124 PetriNetUnfolderBase]: 3592/5785 cut-off events. [2024-06-21 21:40:59,700 INFO L125 PetriNetUnfolderBase]: For 283670/283703 co-relation queries the response was YES. [2024-06-21 21:40:59,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 5785 events. 3592/5785 cut-off events. For 283670/283703 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35723 event pairs, 835 based on Foata normal form. 35/5820 useless extension candidates. Maximal degree in co-relation 40136. Up to 5292 conditions per place. [2024-06-21 21:40:59,773 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 367 selfloop transitions, 118 changer transitions 0/489 dead transitions. [2024-06-21 21:40:59,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 489 transitions, 7348 flow [2024-06-21 21:40:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:40:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:40:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:40:59,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:40:59,774 INFO L175 Difference]: Start difference. First operand has 307 places, 454 transitions, 5866 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:40:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 489 transitions, 7348 flow [2024-06-21 21:41:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 489 transitions, 7210 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:41:00,581 INFO L231 Difference]: Finished difference. Result has 309 places, 463 transitions, 6156 flow [2024-06-21 21:41:00,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5728, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6156, PETRI_PLACES=309, PETRI_TRANSITIONS=463} [2024-06-21 21:41:00,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 21:41:00,582 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 463 transitions, 6156 flow [2024-06-21 21:41:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:00,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:00,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:00,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:41:00,583 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -943204860, now seen corresponding path program 4 times [2024-06-21 21:41:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191122917] [2024-06-21 21:41:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191122917] [2024-06-21 21:41:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191122917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:03,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:03,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:03,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455323662] [2024-06-21 21:41:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:03,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:03,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 463 transitions, 6156 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:03,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:03,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:03,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:05,446 INFO L124 PetriNetUnfolderBase]: 3659/5875 cut-off events. [2024-06-21 21:41:05,446 INFO L125 PetriNetUnfolderBase]: For 298902/298923 co-relation queries the response was YES. [2024-06-21 21:41:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41640 conditions, 5875 events. 3659/5875 cut-off events. For 298902/298923 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36364 event pairs, 830 based on Foata normal form. 22/5897 useless extension candidates. Maximal degree in co-relation 41501. Up to 5366 conditions per place. [2024-06-21 21:41:05,513 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 377 selfloop transitions, 149 changer transitions 0/530 dead transitions. [2024-06-21 21:41:05,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 530 transitions, 8360 flow [2024-06-21 21:41:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:41:05,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 21:41:05,514 INFO L175 Difference]: Start difference. First operand has 309 places, 463 transitions, 6156 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:41:05,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 530 transitions, 8360 flow [2024-06-21 21:41:06,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 530 transitions, 7980 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-21 21:41:06,214 INFO L231 Difference]: Finished difference. Result has 315 places, 496 transitions, 6710 flow [2024-06-21 21:41:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6710, PETRI_PLACES=315, PETRI_TRANSITIONS=496} [2024-06-21 21:41:06,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 21:41:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 496 transitions, 6710 flow [2024-06-21 21:41:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:06,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:06,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:06,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:41:06,215 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:06,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1849240058, now seen corresponding path program 5 times [2024-06-21 21:41:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:06,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872997216] [2024-06-21 21:41:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:06,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872997216] [2024-06-21 21:41:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872997216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:08,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69896344] [2024-06-21 21:41:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 496 transitions, 6710 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:08,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:10,458 INFO L124 PetriNetUnfolderBase]: 3655/5873 cut-off events. [2024-06-21 21:41:10,458 INFO L125 PetriNetUnfolderBase]: For 300052/300085 co-relation queries the response was YES. [2024-06-21 21:41:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41434 conditions, 5873 events. 3655/5873 cut-off events. For 300052/300085 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36256 event pairs, 842 based on Foata normal form. 37/5910 useless extension candidates. Maximal degree in co-relation 41294. Up to 5464 conditions per place. [2024-06-21 21:41:10,533 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 406 selfloop transitions, 109 changer transitions 0/519 dead transitions. [2024-06-21 21:41:10,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 519 transitions, 8013 flow [2024-06-21 21:41:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:41:10,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:41:10,534 INFO L175 Difference]: Start difference. First operand has 315 places, 496 transitions, 6710 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:41:10,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 519 transitions, 8013 flow [2024-06-21 21:41:11,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 519 transitions, 7744 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 21:41:11,407 INFO L231 Difference]: Finished difference. Result has 318 places, 499 transitions, 6766 flow [2024-06-21 21:41:11,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6444, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6766, PETRI_PLACES=318, PETRI_TRANSITIONS=499} [2024-06-21 21:41:11,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 21:41:11,408 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 499 transitions, 6766 flow [2024-06-21 21:41:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:11,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:11,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:11,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:41:11,409 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:11,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1156825092, now seen corresponding path program 6 times [2024-06-21 21:41:11,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:11,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834593657] [2024-06-21 21:41:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834593657] [2024-06-21 21:41:13,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834593657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:13,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:13,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112577914] [2024-06-21 21:41:13,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:13,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:13,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 499 transitions, 6766 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:13,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:13,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:13,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:16,241 INFO L124 PetriNetUnfolderBase]: 3649/5865 cut-off events. [2024-06-21 21:41:16,241 INFO L125 PetriNetUnfolderBase]: For 301613/301646 co-relation queries the response was YES. [2024-06-21 21:41:16,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41248 conditions, 5865 events. 3649/5865 cut-off events. For 301613/301646 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36246 event pairs, 833 based on Foata normal form. 35/5900 useless extension candidates. Maximal degree in co-relation 41107. Up to 5458 conditions per place. [2024-06-21 21:41:16,312 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 398 selfloop transitions, 118 changer transitions 0/520 dead transitions. [2024-06-21 21:41:16,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 520 transitions, 7882 flow [2024-06-21 21:41:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:41:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:41:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:41:16,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 21:41:16,313 INFO L175 Difference]: Start difference. First operand has 318 places, 499 transitions, 6766 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:41:16,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 520 transitions, 7882 flow [2024-06-21 21:41:17,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 520 transitions, 7572 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 21:41:17,129 INFO L231 Difference]: Finished difference. Result has 321 places, 499 transitions, 6712 flow [2024-06-21 21:41:17,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6712, PETRI_PLACES=321, PETRI_TRANSITIONS=499} [2024-06-21 21:41:17,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 21:41:17,130 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 499 transitions, 6712 flow [2024-06-21 21:41:17,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:17,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:17,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:41:17,130 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:17,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1519354582, now seen corresponding path program 7 times [2024-06-21 21:41:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:17,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870503474] [2024-06-21 21:41:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:17,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:19,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870503474] [2024-06-21 21:41:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870503474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:19,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535978426] [2024-06-21 21:41:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:19,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:19,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 499 transitions, 6712 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:19,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:19,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:19,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:21,521 INFO L124 PetriNetUnfolderBase]: 3651/5862 cut-off events. [2024-06-21 21:41:21,522 INFO L125 PetriNetUnfolderBase]: For 299935/299962 co-relation queries the response was YES. [2024-06-21 21:41:21,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41153 conditions, 5862 events. 3651/5862 cut-off events. For 299935/299962 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36086 event pairs, 871 based on Foata normal form. 15/5877 useless extension candidates. Maximal degree in co-relation 41012. Up to 5360 conditions per place. [2024-06-21 21:41:21,596 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 160 changer transitions 0/514 dead transitions. [2024-06-21 21:41:21,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 514 transitions, 7944 flow [2024-06-21 21:41:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:41:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:41:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 21:41:21,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 21:41:21,597 INFO L175 Difference]: Start difference. First operand has 321 places, 499 transitions, 6712 flow. Second operand 7 states and 109 transitions. [2024-06-21 21:41:21,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 514 transitions, 7944 flow [2024-06-21 21:41:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 514 transitions, 7599 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 21:41:22,491 INFO L231 Difference]: Finished difference. Result has 320 places, 502 transitions, 6753 flow [2024-06-21 21:41:22,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6753, PETRI_PLACES=320, PETRI_TRANSITIONS=502} [2024-06-21 21:41:22,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 21:41:22,491 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 502 transitions, 6753 flow [2024-06-21 21:41:22,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:22,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:22,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:22,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:41:22,492 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:22,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1518988162, now seen corresponding path program 1 times [2024-06-21 21:41:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983084041] [2024-06-21 21:41:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:22,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:25,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:25,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983084041] [2024-06-21 21:41:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983084041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:25,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891296556] [2024-06-21 21:41:25,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:25,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:41:25,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 502 transitions, 6753 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:25,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:25,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:41:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:27,883 INFO L124 PetriNetUnfolderBase]: 3517/5706 cut-off events. [2024-06-21 21:41:27,883 INFO L125 PetriNetUnfolderBase]: For 308423/308661 co-relation queries the response was YES. [2024-06-21 21:41:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39958 conditions, 5706 events. 3517/5706 cut-off events. For 308423/308661 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35939 event pairs, 1121 based on Foata normal form. 199/5862 useless extension candidates. Maximal degree in co-relation 39817. Up to 5249 conditions per place. [2024-06-21 21:41:27,956 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 397 selfloop transitions, 64 changer transitions 0/517 dead transitions. [2024-06-21 21:41:27,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 517 transitions, 7755 flow [2024-06-21 21:41:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:41:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:41:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:41:27,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:41:27,957 INFO L175 Difference]: Start difference. First operand has 320 places, 502 transitions, 6753 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:41:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 517 transitions, 7755 flow [2024-06-21 21:41:28,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 517 transitions, 7493 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:41:28,757 INFO L231 Difference]: Finished difference. Result has 323 places, 504 transitions, 6676 flow [2024-06-21 21:41:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6491, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6676, PETRI_PLACES=323, PETRI_TRANSITIONS=504} [2024-06-21 21:41:28,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 21:41:28,757 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 504 transitions, 6676 flow [2024-06-21 21:41:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:28,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:28,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:41:28,758 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:28,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1316682468, now seen corresponding path program 7 times [2024-06-21 21:41:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566931907] [2024-06-21 21:41:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566931907] [2024-06-21 21:41:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566931907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:31,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338650844] [2024-06-21 21:41:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:31,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:31,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:31,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 504 transitions, 6676 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:31,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:31,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:31,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:33,244 INFO L124 PetriNetUnfolderBase]: 3662/5891 cut-off events. [2024-06-21 21:41:33,244 INFO L125 PetriNetUnfolderBase]: For 303249/303263 co-relation queries the response was YES. [2024-06-21 21:41:33,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41205 conditions, 5891 events. 3662/5891 cut-off events. For 303249/303263 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36400 event pairs, 890 based on Foata normal form. 16/5907 useless extension candidates. Maximal degree in co-relation 41063. Up to 5367 conditions per place. [2024-06-21 21:41:33,316 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/528 dead transitions. [2024-06-21 21:41:33,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 528 transitions, 7800 flow [2024-06-21 21:41:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:41:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:41:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:41:33,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 21:41:33,317 INFO L175 Difference]: Start difference. First operand has 323 places, 504 transitions, 6676 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:41:33,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 528 transitions, 7800 flow [2024-06-21 21:41:34,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 528 transitions, 7637 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:41:34,094 INFO L231 Difference]: Finished difference. Result has 325 places, 504 transitions, 6712 flow [2024-06-21 21:41:34,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6712, PETRI_PLACES=325, PETRI_TRANSITIONS=504} [2024-06-21 21:41:34,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 21:41:34,095 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 504 transitions, 6712 flow [2024-06-21 21:41:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:34,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:34,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:41:34,096 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:34,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1325256324, now seen corresponding path program 8 times [2024-06-21 21:41:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:34,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035425124] [2024-06-21 21:41:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:36,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035425124] [2024-06-21 21:41:36,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035425124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:36,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:36,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:41:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865731655] [2024-06-21 21:41:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:41:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:41:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:41:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:36,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 504 transitions, 6712 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:36,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:36,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:36,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:38,828 INFO L124 PetriNetUnfolderBase]: 3659/5884 cut-off events. [2024-06-21 21:41:38,828 INFO L125 PetriNetUnfolderBase]: For 306844/306877 co-relation queries the response was YES. [2024-06-21 21:41:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41349 conditions, 5884 events. 3659/5884 cut-off events. For 306844/306877 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 36446 event pairs, 840 based on Foata normal form. 34/5918 useless extension candidates. Maximal degree in co-relation 41206. Up to 5374 conditions per place. [2024-06-21 21:41:38,890 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 161 changer transitions 0/522 dead transitions. [2024-06-21 21:41:38,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 522 transitions, 7804 flow [2024-06-21 21:41:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:41:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:41:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:41:38,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 21:41:38,892 INFO L175 Difference]: Start difference. First operand has 325 places, 504 transitions, 6712 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:41:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 522 transitions, 7804 flow [2024-06-21 21:41:39,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 522 transitions, 7585 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:39,551 INFO L231 Difference]: Finished difference. Result has 325 places, 504 transitions, 6833 flow [2024-06-21 21:41:39,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6833, PETRI_PLACES=325, PETRI_TRANSITIONS=504} [2024-06-21 21:41:39,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 21:41:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 504 transitions, 6833 flow [2024-06-21 21:41:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:39,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:39,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:41:39,553 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash 623837400, now seen corresponding path program 2 times [2024-06-21 21:41:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908675771] [2024-06-21 21:41:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908675771] [2024-06-21 21:41:43,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908675771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:43,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:43,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918271744] [2024-06-21 21:41:43,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:43,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:43,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:41:43,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 504 transitions, 6833 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:43,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:43,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:41:43,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:45,524 INFO L124 PetriNetUnfolderBase]: 3521/5715 cut-off events. [2024-06-21 21:41:45,524 INFO L125 PetriNetUnfolderBase]: For 304298/304536 co-relation queries the response was YES. [2024-06-21 21:41:45,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39937 conditions, 5715 events. 3521/5715 cut-off events. For 304298/304536 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36012 event pairs, 1123 based on Foata normal form. 199/5871 useless extension candidates. Maximal degree in co-relation 39795. Up to 5258 conditions per place. [2024-06-21 21:41:45,585 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 398 selfloop transitions, 67 changer transitions 0/521 dead transitions. [2024-06-21 21:41:45,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 521 transitions, 7853 flow [2024-06-21 21:41:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:41:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:41:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:41:45,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:41:45,586 INFO L175 Difference]: Start difference. First operand has 325 places, 504 transitions, 6833 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:41:45,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 521 transitions, 7853 flow [2024-06-21 21:41:46,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 521 transitions, 7373 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:41:46,246 INFO L231 Difference]: Finished difference. Result has 324 places, 506 transitions, 6543 flow [2024-06-21 21:41:46,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6543, PETRI_PLACES=324, PETRI_TRANSITIONS=506} [2024-06-21 21:41:46,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 21:41:46,247 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 506 transitions, 6543 flow [2024-06-21 21:41:46,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:46,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:46,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:41:46,247 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:46,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash 767160382, now seen corresponding path program 3 times [2024-06-21 21:41:46,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:46,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414387757] [2024-06-21 21:41:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:49,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414387757] [2024-06-21 21:41:49,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414387757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:49,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:49,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192522616] [2024-06-21 21:41:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:41:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 506 transitions, 6543 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:41:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:51,925 INFO L124 PetriNetUnfolderBase]: 3511/5701 cut-off events. [2024-06-21 21:41:51,925 INFO L125 PetriNetUnfolderBase]: For 287204/287442 co-relation queries the response was YES. [2024-06-21 21:41:51,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39216 conditions, 5701 events. 3511/5701 cut-off events. For 287204/287442 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35964 event pairs, 1117 based on Foata normal form. 199/5857 useless extension candidates. Maximal degree in co-relation 39075. Up to 5204 conditions per place. [2024-06-21 21:41:51,990 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 398 selfloop transitions, 69 changer transitions 0/523 dead transitions. [2024-06-21 21:41:51,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 523 transitions, 7569 flow [2024-06-21 21:41:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:41:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:41:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:41:51,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:41:51,992 INFO L175 Difference]: Start difference. First operand has 324 places, 506 transitions, 6543 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:41:51,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 523 transitions, 7569 flow [2024-06-21 21:41:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 523 transitions, 7397 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:52,683 INFO L231 Difference]: Finished difference. Result has 326 places, 508 transitions, 6568 flow [2024-06-21 21:41:52,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=326, PETRI_TRANSITIONS=508} [2024-06-21 21:41:52,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 21:41:52,683 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 508 transitions, 6568 flow [2024-06-21 21:41:52,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:52,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:52,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:41:52,684 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:52,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1857385856, now seen corresponding path program 1 times [2024-06-21 21:41:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337402187] [2024-06-21 21:41:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:55,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337402187] [2024-06-21 21:41:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337402187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:55,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:55,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131797744] [2024-06-21 21:41:55,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:55,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:41:55,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 508 transitions, 6568 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:55,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:55,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:41:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:57,643 INFO L124 PetriNetUnfolderBase]: 3627/5868 cut-off events. [2024-06-21 21:41:57,644 INFO L125 PetriNetUnfolderBase]: For 298827/298856 co-relation queries the response was YES. [2024-06-21 21:41:57,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40848 conditions, 5868 events. 3627/5868 cut-off events. For 298827/298856 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36578 event pairs, 1033 based on Foata normal form. 32/5890 useless extension candidates. Maximal degree in co-relation 40706. Up to 5359 conditions per place. [2024-06-21 21:41:57,729 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 447 selfloop transitions, 71 changer transitions 0/539 dead transitions. [2024-06-21 21:41:57,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 539 transitions, 7912 flow [2024-06-21 21:41:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:41:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:41:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:41:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:41:57,731 INFO L175 Difference]: Start difference. First operand has 326 places, 508 transitions, 6568 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:41:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 539 transitions, 7912 flow [2024-06-21 21:41:58,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 539 transitions, 7731 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:58,519 INFO L231 Difference]: Finished difference. Result has 328 places, 512 transitions, 6634 flow [2024-06-21 21:41:58,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6387, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=328, PETRI_TRANSITIONS=512} [2024-06-21 21:41:58,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 21:41:58,520 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 512 transitions, 6634 flow [2024-06-21 21:41:58,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:41:58,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:58,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:58,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:41:58,521 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:58,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash -686272832, now seen corresponding path program 2 times [2024-06-21 21:41:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507103819] [2024-06-21 21:41:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:01,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:01,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507103819] [2024-06-21 21:42:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507103819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840271762] [2024-06-21 21:42:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:01,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:01,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:01,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:01,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 512 transitions, 6634 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:42:01,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:01,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:01,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:03,781 INFO L124 PetriNetUnfolderBase]: 3639/5899 cut-off events. [2024-06-21 21:42:03,781 INFO L125 PetriNetUnfolderBase]: For 307887/307916 co-relation queries the response was YES. [2024-06-21 21:42:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41181 conditions, 5899 events. 3639/5899 cut-off events. For 307887/307916 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 37029 event pairs, 1197 based on Foata normal form. 32/5921 useless extension candidates. Maximal degree in co-relation 41038. Up to 5453 conditions per place. [2024-06-21 21:42:03,856 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 446 selfloop transitions, 68 changer transitions 0/535 dead transitions. [2024-06-21 21:42:03,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 535 transitions, 7782 flow [2024-06-21 21:42:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:42:03,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:42:03,858 INFO L175 Difference]: Start difference. First operand has 328 places, 512 transitions, 6634 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:42:03,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 535 transitions, 7782 flow [2024-06-21 21:42:04,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 535 transitions, 7634 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:04,789 INFO L231 Difference]: Finished difference. Result has 332 places, 514 transitions, 6683 flow [2024-06-21 21:42:04,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6683, PETRI_PLACES=332, PETRI_TRANSITIONS=514} [2024-06-21 21:42:04,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 21:42:04,790 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 514 transitions, 6683 flow [2024-06-21 21:42:04,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:42:04,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:04,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:04,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:42:04,790 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:04,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1435806050, now seen corresponding path program 1 times [2024-06-21 21:42:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828894027] [2024-06-21 21:42:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828894027] [2024-06-21 21:42:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828894027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:07,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959501187] [2024-06-21 21:42:07,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:07,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:07,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:07,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 514 transitions, 6683 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:07,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:07,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:07,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:09,744 INFO L124 PetriNetUnfolderBase]: 3749/6032 cut-off events. [2024-06-21 21:42:09,744 INFO L125 PetriNetUnfolderBase]: For 319231/319235 co-relation queries the response was YES. [2024-06-21 21:42:09,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42225 conditions, 6032 events. 3749/6032 cut-off events. For 319231/319235 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 37879 event pairs, 1802 based on Foata normal form. 6/6038 useless extension candidates. Maximal degree in co-relation 42080. Up to 5746 conditions per place. [2024-06-21 21:42:09,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 507 selfloop transitions, 46 changer transitions 0/557 dead transitions. [2024-06-21 21:42:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 557 transitions, 8322 flow [2024-06-21 21:42:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:42:09,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:42:09,825 INFO L175 Difference]: Start difference. First operand has 332 places, 514 transitions, 6683 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:42:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 557 transitions, 8322 flow [2024-06-21 21:42:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 557 transitions, 8140 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:10,636 INFO L231 Difference]: Finished difference. Result has 337 places, 530 transitions, 6839 flow [2024-06-21 21:42:10,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6839, PETRI_PLACES=337, PETRI_TRANSITIONS=530} [2024-06-21 21:42:10,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 21:42:10,636 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 530 transitions, 6839 flow [2024-06-21 21:42:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:10,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:10,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:10,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:42:10,637 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:10,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -683476322, now seen corresponding path program 3 times [2024-06-21 21:42:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334998103] [2024-06-21 21:42:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:14,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:14,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334998103] [2024-06-21 21:42:14,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334998103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:14,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:14,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:14,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483089656] [2024-06-21 21:42:14,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:14,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:14,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:14,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 530 transitions, 6839 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:42:14,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:14,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:14,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:16,665 INFO L124 PetriNetUnfolderBase]: 3663/5929 cut-off events. [2024-06-21 21:42:16,665 INFO L125 PetriNetUnfolderBase]: For 323533/323562 co-relation queries the response was YES. [2024-06-21 21:42:16,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41790 conditions, 5929 events. 3663/5929 cut-off events. For 323533/323562 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 37217 event pairs, 1195 based on Foata normal form. 32/5951 useless extension candidates. Maximal degree in co-relation 41641. Up to 5499 conditions per place. [2024-06-21 21:42:16,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 460 selfloop transitions, 64 changer transitions 0/549 dead transitions. [2024-06-21 21:42:16,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 549 transitions, 7991 flow [2024-06-21 21:42:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:42:16,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:42:16,746 INFO L175 Difference]: Start difference. First operand has 337 places, 530 transitions, 6839 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:42:16,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 549 transitions, 7991 flow [2024-06-21 21:42:17,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 549 transitions, 7907 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:17,509 INFO L231 Difference]: Finished difference. Result has 342 places, 532 transitions, 6944 flow [2024-06-21 21:42:17,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6944, PETRI_PLACES=342, PETRI_TRANSITIONS=532} [2024-06-21 21:42:17,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 21:42:17,510 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 532 transitions, 6944 flow [2024-06-21 21:42:17,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:42:17,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:17,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:17,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:42:17,510 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:17,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash -683476198, now seen corresponding path program 2 times [2024-06-21 21:42:17,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:17,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957795428] [2024-06-21 21:42:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:21,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957795428] [2024-06-21 21:42:21,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957795428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:21,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481200649] [2024-06-21 21:42:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:21,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:21,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:21,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:21,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 532 transitions, 6944 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:21,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:21,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:21,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:23,306 INFO L124 PetriNetUnfolderBase]: 3749/6032 cut-off events. [2024-06-21 21:42:23,306 INFO L125 PetriNetUnfolderBase]: For 328914/328918 co-relation queries the response was YES. [2024-06-21 21:42:23,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42737 conditions, 6032 events. 3749/6032 cut-off events. For 328914/328918 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 37901 event pairs, 1793 based on Foata normal form. 6/6038 useless extension candidates. Maximal degree in co-relation 42587. Up to 5816 conditions per place. [2024-06-21 21:42:23,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 532 selfloop transitions, 24 changer transitions 0/560 dead transitions. [2024-06-21 21:42:23,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 560 transitions, 8337 flow [2024-06-21 21:42:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:42:23,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:42:23,394 INFO L175 Difference]: Start difference. First operand has 342 places, 532 transitions, 6944 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:42:23,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 560 transitions, 8337 flow [2024-06-21 21:42:24,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 560 transitions, 8161 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:24,423 INFO L231 Difference]: Finished difference. Result has 345 places, 540 transitions, 6924 flow [2024-06-21 21:42:24,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6924, PETRI_PLACES=345, PETRI_TRANSITIONS=540} [2024-06-21 21:42:24,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 21:42:24,423 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 540 transitions, 6924 flow [2024-06-21 21:42:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:24,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:42:24,424 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -683471548, now seen corresponding path program 3 times [2024-06-21 21:42:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122988728] [2024-06-21 21:42:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122988728] [2024-06-21 21:42:29,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122988728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:29,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:29,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138115683] [2024-06-21 21:42:29,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:29,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:29,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:29,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 540 transitions, 6924 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:29,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:29,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:30,966 INFO L124 PetriNetUnfolderBase]: 3743/6024 cut-off events. [2024-06-21 21:42:30,966 INFO L125 PetriNetUnfolderBase]: For 333132/333136 co-relation queries the response was YES. [2024-06-21 21:42:31,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42875 conditions, 6024 events. 3743/6024 cut-off events. For 333132/333136 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 37788 event pairs, 1793 based on Foata normal form. 6/6030 useless extension candidates. Maximal degree in co-relation 42723. Up to 5820 conditions per place. [2024-06-21 21:42:31,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 535 selfloop transitions, 20 changer transitions 0/559 dead transitions. [2024-06-21 21:42:31,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 559 transitions, 8103 flow [2024-06-21 21:42:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 21:42:31,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-21 21:42:31,037 INFO L175 Difference]: Start difference. First operand has 345 places, 540 transitions, 6924 flow. Second operand 8 states and 119 transitions. [2024-06-21 21:42:31,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 559 transitions, 8103 flow [2024-06-21 21:42:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 559 transitions, 7985 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:31,780 INFO L231 Difference]: Finished difference. Result has 348 places, 541 transitions, 6865 flow [2024-06-21 21:42:31,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6812, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6865, PETRI_PLACES=348, PETRI_TRANSITIONS=541} [2024-06-21 21:42:31,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 21:42:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 541 transitions, 6865 flow [2024-06-21 21:42:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:31,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:31,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:42:31,781 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:31,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash -568000702, now seen corresponding path program 1 times [2024-06-21 21:42:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:31,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124506972] [2024-06-21 21:42:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:35,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124506972] [2024-06-21 21:42:35,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124506972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:35,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:35,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520213313] [2024-06-21 21:42:35,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:35,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:35,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:35,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:35,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 541 transitions, 6865 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:35,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:35,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:35,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:37,852 INFO L124 PetriNetUnfolderBase]: 3930/6299 cut-off events. [2024-06-21 21:42:37,852 INFO L125 PetriNetUnfolderBase]: For 397882/397890 co-relation queries the response was YES. [2024-06-21 21:42:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47078 conditions, 6299 events. 3930/6299 cut-off events. For 397882/397890 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39444 event pairs, 1649 based on Foata normal form. 9/6308 useless extension candidates. Maximal degree in co-relation 46925. Up to 5409 conditions per place. [2024-06-21 21:42:37,922 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 425 selfloop transitions, 159 changer transitions 0/588 dead transitions. [2024-06-21 21:42:37,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 588 transitions, 8707 flow [2024-06-21 21:42:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:42:37,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:42:37,923 INFO L175 Difference]: Start difference. First operand has 348 places, 541 transitions, 6865 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:42:37,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 588 transitions, 8707 flow [2024-06-21 21:42:38,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 588 transitions, 8639 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:38,863 INFO L231 Difference]: Finished difference. Result has 351 places, 558 transitions, 7548 flow [2024-06-21 21:42:38,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7548, PETRI_PLACES=351, PETRI_TRANSITIONS=558} [2024-06-21 21:42:38,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 21:42:38,864 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 558 transitions, 7548 flow [2024-06-21 21:42:38,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:38,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:38,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:38,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:42:38,864 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:38,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -568185028, now seen corresponding path program 4 times [2024-06-21 21:42:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439719453] [2024-06-21 21:42:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:38,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439719453] [2024-06-21 21:42:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439719453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:41,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:41,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:41,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391556178] [2024-06-21 21:42:41,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:41,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:41,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:41,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 558 transitions, 7548 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:41,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:41,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:41,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:43,631 INFO L124 PetriNetUnfolderBase]: 3940/6309 cut-off events. [2024-06-21 21:42:43,632 INFO L125 PetriNetUnfolderBase]: For 417717/417721 co-relation queries the response was YES. [2024-06-21 21:42:43,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49031 conditions, 6309 events. 3940/6309 cut-off events. For 417717/417721 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 39352 event pairs, 1864 based on Foata normal form. 6/6315 useless extension candidates. Maximal degree in co-relation 48876. Up to 6052 conditions per place. [2024-06-21 21:42:43,718 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 43 changer transitions 0/582 dead transitions. [2024-06-21 21:42:43,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 582 transitions, 8957 flow [2024-06-21 21:42:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 21:42:43,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-21 21:42:43,720 INFO L175 Difference]: Start difference. First operand has 351 places, 558 transitions, 7548 flow. Second operand 9 states and 133 transitions. [2024-06-21 21:42:43,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 582 transitions, 8957 flow [2024-06-21 21:42:44,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 582 transitions, 8873 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:44,871 INFO L231 Difference]: Finished difference. Result has 357 places, 564 transitions, 7627 flow [2024-06-21 21:42:44,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7464, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7627, PETRI_PLACES=357, PETRI_TRANSITIONS=564} [2024-06-21 21:42:44,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 21:42:44,872 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 564 transitions, 7627 flow [2024-06-21 21:42:44,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:44,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:44,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:42:44,873 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:44,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:44,873 INFO L85 PathProgramCache]: Analyzing trace with hash -568007398, now seen corresponding path program 5 times [2024-06-21 21:42:44,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700755695] [2024-06-21 21:42:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700755695] [2024-06-21 21:42:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700755695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766336760] [2024-06-21 21:42:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:47,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:47,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:47,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 564 transitions, 7627 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:47,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:47,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:47,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:50,323 INFO L124 PetriNetUnfolderBase]: 3958/6338 cut-off events. [2024-06-21 21:42:50,324 INFO L125 PetriNetUnfolderBase]: For 428986/428996 co-relation queries the response was YES. [2024-06-21 21:42:50,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49303 conditions, 6338 events. 3958/6338 cut-off events. For 428986/428996 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39693 event pairs, 1649 based on Foata normal form. 12/6350 useless extension candidates. Maximal degree in co-relation 49145. Up to 5444 conditions per place. [2024-06-21 21:42:50,407 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 162 changer transitions 0/598 dead transitions. [2024-06-21 21:42:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 598 transitions, 9225 flow [2024-06-21 21:42:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:42:50,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:42:50,409 INFO L175 Difference]: Start difference. First operand has 357 places, 564 transitions, 7627 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:42:50,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 598 transitions, 9225 flow [2024-06-21 21:42:51,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 598 transitions, 9149 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:51,453 INFO L231 Difference]: Finished difference. Result has 362 places, 573 transitions, 8199 flow [2024-06-21 21:42:51,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8199, PETRI_PLACES=362, PETRI_TRANSITIONS=573} [2024-06-21 21:42:51,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 21:42:51,453 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 573 transitions, 8199 flow [2024-06-21 21:42:51,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:51,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:51,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:42:51,454 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:51,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1431217430, now seen corresponding path program 6 times [2024-06-21 21:42:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:51,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569150843] [2024-06-21 21:42:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:54,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569150843] [2024-06-21 21:42:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569150843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:54,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703991536] [2024-06-21 21:42:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:54,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:54,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:54,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 573 transitions, 8199 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:54,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:54,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:54,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:56,814 INFO L124 PetriNetUnfolderBase]: 3952/6324 cut-off events. [2024-06-21 21:42:56,815 INFO L125 PetriNetUnfolderBase]: For 439577/439581 co-relation queries the response was YES. [2024-06-21 21:42:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 6324 events. 3952/6324 cut-off events. For 439577/439581 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 39464 event pairs, 1863 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 50488. Up to 6092 conditions per place. [2024-06-21 21:42:56,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 39 changer transitions 0/589 dead transitions. [2024-06-21 21:42:56,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 589 transitions, 9440 flow [2024-06-21 21:42:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 21:42:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:42:56,908 INFO L175 Difference]: Start difference. First operand has 362 places, 573 transitions, 8199 flow. Second operand 8 states and 120 transitions. [2024-06-21 21:42:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 589 transitions, 9440 flow [2024-06-21 21:42:58,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 589 transitions, 9363 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:58,166 INFO L231 Difference]: Finished difference. Result has 365 places, 574 transitions, 8223 flow [2024-06-21 21:42:58,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8126, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8223, PETRI_PLACES=365, PETRI_TRANSITIONS=574} [2024-06-21 21:42:58,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 21:42:58,166 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 574 transitions, 8223 flow [2024-06-21 21:42:58,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:58,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:58,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:42:58,167 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1431222204, now seen corresponding path program 4 times [2024-06-21 21:42:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942645747] [2024-06-21 21:42:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942645747] [2024-06-21 21:43:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942645747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:01,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:01,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84761869] [2024-06-21 21:43:01,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:01,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:01,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:01,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 574 transitions, 8223 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:43:01,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:01,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:01,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:03,363 INFO L124 PetriNetUnfolderBase]: 3861/6216 cut-off events. [2024-06-21 21:43:03,363 INFO L125 PetriNetUnfolderBase]: For 442636/442671 co-relation queries the response was YES. [2024-06-21 21:43:03,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49712 conditions, 6216 events. 3861/6216 cut-off events. For 442636/442671 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38884 event pairs, 1251 based on Foata normal form. 29/6235 useless extension candidates. Maximal degree in co-relation 49549. Up to 5802 conditions per place. [2024-06-21 21:43:03,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 481 selfloop transitions, 71 changer transitions 0/587 dead transitions. [2024-06-21 21:43:03,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 587 transitions, 9363 flow [2024-06-21 21:43:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:43:03,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 21:43:03,443 INFO L175 Difference]: Start difference. First operand has 365 places, 574 transitions, 8223 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:43:03,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 587 transitions, 9363 flow [2024-06-21 21:43:04,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 587 transitions, 9250 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:04,829 INFO L231 Difference]: Finished difference. Result has 367 places, 574 transitions, 8260 flow [2024-06-21 21:43:04,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8260, PETRI_PLACES=367, PETRI_TRANSITIONS=574} [2024-06-21 21:43:04,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 21:43:04,830 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 574 transitions, 8260 flow [2024-06-21 21:43:04,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-21 21:43:04,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:04,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:04,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:43:04,830 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:04,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 308176335, now seen corresponding path program 1 times [2024-06-21 21:43:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534770223] [2024-06-21 21:43:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:07,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534770223] [2024-06-21 21:43:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534770223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:07,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:07,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220023061] [2024-06-21 21:43:07,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:07,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:07,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 574 transitions, 8260 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:07,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:07,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:07,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:09,955 INFO L124 PetriNetUnfolderBase]: 4029/6429 cut-off events. [2024-06-21 21:43:09,955 INFO L125 PetriNetUnfolderBase]: For 490244/490252 co-relation queries the response was YES. [2024-06-21 21:43:10,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52046 conditions, 6429 events. 4029/6429 cut-off events. For 490244/490252 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40000 event pairs, 1180 based on Foata normal form. 16/6445 useless extension candidates. Maximal degree in co-relation 51882. Up to 5885 conditions per place. [2024-06-21 21:43:10,050 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 100 changer transitions 0/632 dead transitions. [2024-06-21 21:43:10,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 632 transitions, 9934 flow [2024-06-21 21:43:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:43:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:43:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 21:43:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:43:10,051 INFO L175 Difference]: Start difference. First operand has 367 places, 574 transitions, 8260 flow. Second operand 13 states and 210 transitions. [2024-06-21 21:43:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 632 transitions, 9934 flow [2024-06-21 21:43:11,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 632 transitions, 9778 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:11,577 INFO L231 Difference]: Finished difference. Result has 373 places, 576 transitions, 8340 flow [2024-06-21 21:43:11,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8104, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8340, PETRI_PLACES=373, PETRI_TRANSITIONS=576} [2024-06-21 21:43:11,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 21:43:11,577 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 576 transitions, 8340 flow [2024-06-21 21:43:11,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:11,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:11,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:11,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:43:11,578 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:11,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1750294011, now seen corresponding path program 2 times [2024-06-21 21:43:11,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:11,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807263332] [2024-06-21 21:43:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807263332] [2024-06-21 21:43:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807263332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:13,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:13,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300516902] [2024-06-21 21:43:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 576 transitions, 8340 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:16,626 INFO L124 PetriNetUnfolderBase]: 4057/6475 cut-off events. [2024-06-21 21:43:16,626 INFO L125 PetriNetUnfolderBase]: For 499691/499699 co-relation queries the response was YES. [2024-06-21 21:43:16,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52676 conditions, 6475 events. 4057/6475 cut-off events. For 499691/499699 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40214 event pairs, 1224 based on Foata normal form. 16/6491 useless extension candidates. Maximal degree in co-relation 52511. Up to 6023 conditions per place. [2024-06-21 21:43:16,721 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 529 selfloop transitions, 93 changer transitions 0/626 dead transitions. [2024-06-21 21:43:16,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 626 transitions, 9968 flow [2024-06-21 21:43:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:43:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:43:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 202 transitions. [2024-06-21 21:43:16,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36996336996337 [2024-06-21 21:43:16,723 INFO L175 Difference]: Start difference. First operand has 373 places, 576 transitions, 8340 flow. Second operand 13 states and 202 transitions. [2024-06-21 21:43:16,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 626 transitions, 9968 flow [2024-06-21 21:43:18,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 626 transitions, 9834 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:43:18,166 INFO L231 Difference]: Finished difference. Result has 377 places, 577 transitions, 8413 flow [2024-06-21 21:43:18,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8210, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8413, PETRI_PLACES=377, PETRI_TRANSITIONS=577} [2024-06-21 21:43:18,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 21:43:18,166 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 577 transitions, 8413 flow [2024-06-21 21:43:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:18,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:18,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:43:18,167 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:18,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1643960443, now seen corresponding path program 3 times [2024-06-21 21:43:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:18,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342590787] [2024-06-21 21:43:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342590787] [2024-06-21 21:43:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342590787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:20,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:20,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616837905] [2024-06-21 21:43:20,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:20,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:20,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:20,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:20,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 577 transitions, 8413 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:20,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:20,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:20,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:23,406 INFO L124 PetriNetUnfolderBase]: 4034/6442 cut-off events. [2024-06-21 21:43:23,406 INFO L125 PetriNetUnfolderBase]: For 488111/488119 co-relation queries the response was YES. [2024-06-21 21:43:23,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52016 conditions, 6442 events. 4034/6442 cut-off events. For 488111/488119 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39990 event pairs, 1233 based on Foata normal form. 18/6460 useless extension candidates. Maximal degree in co-relation 51849. Up to 6061 conditions per place. [2024-06-21 21:43:23,489 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 88 changer transitions 0/620 dead transitions. [2024-06-21 21:43:23,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 620 transitions, 9831 flow [2024-06-21 21:43:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:43:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:43:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-21 21:43:23,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-21 21:43:23,490 INFO L175 Difference]: Start difference. First operand has 377 places, 577 transitions, 8413 flow. Second operand 12 states and 187 transitions. [2024-06-21 21:43:23,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 620 transitions, 9831 flow [2024-06-21 21:43:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 620 transitions, 9632 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:43:25,015 INFO L231 Difference]: Finished difference. Result has 378 places, 577 transitions, 8397 flow [2024-06-21 21:43:25,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8214, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8397, PETRI_PLACES=378, PETRI_TRANSITIONS=577} [2024-06-21 21:43:25,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:43:25,016 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 577 transitions, 8397 flow [2024-06-21 21:43:25,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:25,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:25,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:25,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:43:25,016 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:25,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 786382843, now seen corresponding path program 4 times [2024-06-21 21:43:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:25,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54247631] [2024-06-21 21:43:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:27,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:27,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54247631] [2024-06-21 21:43:27,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54247631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:27,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7616369] [2024-06-21 21:43:27,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:27,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:27,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:27,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:27,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 577 transitions, 8397 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:27,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:27,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:27,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:30,068 INFO L124 PetriNetUnfolderBase]: 4149/6620 cut-off events. [2024-06-21 21:43:30,069 INFO L125 PetriNetUnfolderBase]: For 526239/526247 co-relation queries the response was YES. [2024-06-21 21:43:30,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53784 conditions, 6620 events. 4149/6620 cut-off events. For 526239/526247 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41116 event pairs, 959 based on Foata normal form. 16/6636 useless extension candidates. Maximal degree in co-relation 53616. Up to 5725 conditions per place. [2024-06-21 21:43:30,165 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 115 changer transitions 0/633 dead transitions. [2024-06-21 21:43:30,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 633 transitions, 10076 flow [2024-06-21 21:43:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:43:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:43:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 21:43:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:43:30,168 INFO L175 Difference]: Start difference. First operand has 378 places, 577 transitions, 8397 flow. Second operand 12 states and 195 transitions. [2024-06-21 21:43:30,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 633 transitions, 10076 flow [2024-06-21 21:43:31,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 633 transitions, 9892 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 21:43:31,682 INFO L231 Difference]: Finished difference. Result has 379 places, 580 transitions, 8491 flow [2024-06-21 21:43:31,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8491, PETRI_PLACES=379, PETRI_TRANSITIONS=580} [2024-06-21 21:43:31,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 21:43:31,683 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 580 transitions, 8491 flow [2024-06-21 21:43:31,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:31,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:31,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:43:31,684 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:31,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1202082921, now seen corresponding path program 1 times [2024-06-21 21:43:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111653141] [2024-06-21 21:43:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:34,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111653141] [2024-06-21 21:43:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111653141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:34,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017067477] [2024-06-21 21:43:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:34,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:34,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 580 transitions, 8491 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:34,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:34,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:34,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:37,218 INFO L124 PetriNetUnfolderBase]: 4154/6620 cut-off events. [2024-06-21 21:43:37,219 INFO L125 PetriNetUnfolderBase]: For 515888/515912 co-relation queries the response was YES. [2024-06-21 21:43:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54313 conditions, 6620 events. 4154/6620 cut-off events. For 515888/515912 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41154 event pairs, 1108 based on Foata normal form. 25/6645 useless extension candidates. Maximal degree in co-relation 54144. Up to 6214 conditions per place. [2024-06-21 21:43:37,312 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 521 selfloop transitions, 99 changer transitions 0/624 dead transitions. [2024-06-21 21:43:37,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 624 transitions, 9947 flow [2024-06-21 21:43:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:43:37,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:43:37,314 INFO L175 Difference]: Start difference. First operand has 379 places, 580 transitions, 8491 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:43:37,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 624 transitions, 9947 flow [2024-06-21 21:43:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 624 transitions, 9813 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:43:38,944 INFO L231 Difference]: Finished difference. Result has 381 places, 583 transitions, 8652 flow [2024-06-21 21:43:38,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8357, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8652, PETRI_PLACES=381, PETRI_TRANSITIONS=583} [2024-06-21 21:43:38,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 21:43:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 583 transitions, 8652 flow [2024-06-21 21:43:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:38,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:38,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:43:38,946 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:38,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1576944987, now seen corresponding path program 1 times [2024-06-21 21:43:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:38,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489767442] [2024-06-21 21:43:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:41,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:41,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489767442] [2024-06-21 21:43:41,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489767442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:41,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118082971] [2024-06-21 21:43:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:41,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:41,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:41,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 583 transitions, 8652 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:41,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:41,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:41,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:44,587 INFO L124 PetriNetUnfolderBase]: 4212/6704 cut-off events. [2024-06-21 21:43:44,587 INFO L125 PetriNetUnfolderBase]: For 552255/552279 co-relation queries the response was YES. [2024-06-21 21:43:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56217 conditions, 6704 events. 4212/6704 cut-off events. For 552255/552279 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 41735 event pairs, 935 based on Foata normal form. 26/6730 useless extension candidates. Maximal degree in co-relation 56046. Up to 6013 conditions per place. [2024-06-21 21:43:44,690 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 448 selfloop transitions, 192 changer transitions 0/644 dead transitions. [2024-06-21 21:43:44,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 644 transitions, 10882 flow [2024-06-21 21:43:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:43:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:43:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-06-21 21:43:44,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:43:44,691 INFO L175 Difference]: Start difference. First operand has 381 places, 583 transitions, 8652 flow. Second operand 14 states and 224 transitions. [2024-06-21 21:43:44,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 644 transitions, 10882 flow [2024-06-21 21:43:46,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 644 transitions, 10611 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 21:43:46,511 INFO L231 Difference]: Finished difference. Result has 387 places, 595 transitions, 9090 flow [2024-06-21 21:43:46,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8381, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9090, PETRI_PLACES=387, PETRI_TRANSITIONS=595} [2024-06-21 21:43:46,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 21:43:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 595 transitions, 9090 flow [2024-06-21 21:43:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:46,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:46,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:43:46,512 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 774259941, now seen corresponding path program 2 times [2024-06-21 21:43:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712090142] [2024-06-21 21:43:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:46,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:48,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:48,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712090142] [2024-06-21 21:43:48,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712090142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:48,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:48,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:48,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574582616] [2024-06-21 21:43:48,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:48,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:48,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 595 transitions, 9090 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:48,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:48,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:48,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:51,303 INFO L124 PetriNetUnfolderBase]: 4217/6713 cut-off events. [2024-06-21 21:43:51,303 INFO L125 PetriNetUnfolderBase]: For 565877/565901 co-relation queries the response was YES. [2024-06-21 21:43:51,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56962 conditions, 6713 events. 4217/6713 cut-off events. For 565877/565901 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 41795 event pairs, 944 based on Foata normal form. 25/6738 useless extension candidates. Maximal degree in co-relation 56790. Up to 6196 conditions per place. [2024-06-21 21:43:51,411 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 473 selfloop transitions, 158 changer transitions 0/635 dead transitions. [2024-06-21 21:43:51,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 635 transitions, 10556 flow [2024-06-21 21:43:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:43:51,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:43:51,412 INFO L175 Difference]: Start difference. First operand has 387 places, 595 transitions, 9090 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:43:51,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 635 transitions, 10556 flow [2024-06-21 21:43:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 635 transitions, 10189 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-21 21:43:53,585 INFO L231 Difference]: Finished difference. Result has 388 places, 598 transitions, 9140 flow [2024-06-21 21:43:53,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8723, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9140, PETRI_PLACES=388, PETRI_TRANSITIONS=598} [2024-06-21 21:43:53,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:43:53,585 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 598 transitions, 9140 flow [2024-06-21 21:43:53,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:53,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:53,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:53,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:43:53,586 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:53,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1775417217, now seen corresponding path program 2 times [2024-06-21 21:43:53,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:53,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290140431] [2024-06-21 21:43:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:53,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290140431] [2024-06-21 21:43:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290140431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:56,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:56,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215323605] [2024-06-21 21:43:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:56,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:56,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 598 transitions, 9140 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:56,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:56,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:56,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:59,032 INFO L124 PetriNetUnfolderBase]: 4227/6728 cut-off events. [2024-06-21 21:43:59,032 INFO L125 PetriNetUnfolderBase]: For 580589/580613 co-relation queries the response was YES. [2024-06-21 21:43:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57398 conditions, 6728 events. 4227/6728 cut-off events. For 580589/580613 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41917 event pairs, 941 based on Foata normal form. 26/6754 useless extension candidates. Maximal degree in co-relation 57225. Up to 6030 conditions per place. [2024-06-21 21:43:59,131 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 441 selfloop transitions, 197 changer transitions 0/642 dead transitions. [2024-06-21 21:43:59,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 642 transitions, 10932 flow [2024-06-21 21:43:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:43:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:43:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 21:43:59,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:43:59,133 INFO L175 Difference]: Start difference. First operand has 388 places, 598 transitions, 9140 flow. Second operand 12 states and 195 transitions. [2024-06-21 21:43:59,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 642 transitions, 10932 flow [2024-06-21 21:44:00,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 642 transitions, 10551 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 21:44:00,902 INFO L231 Difference]: Finished difference. Result has 392 places, 601 transitions, 9216 flow [2024-06-21 21:44:00,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8759, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9216, PETRI_PLACES=392, PETRI_TRANSITIONS=601} [2024-06-21 21:44:00,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 21:44:00,903 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 601 transitions, 9216 flow [2024-06-21 21:44:00,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:00,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:00,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:00,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:44:00,903 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:00,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash 780689031, now seen corresponding path program 3 times [2024-06-21 21:44:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:00,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200773550] [2024-06-21 21:44:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:03,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200773550] [2024-06-21 21:44:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200773550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:03,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:03,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:03,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296628862] [2024-06-21 21:44:03,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:03,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:03,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:03,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 601 transitions, 9216 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:03,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:03,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:03,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:05,962 INFO L124 PetriNetUnfolderBase]: 4240/6746 cut-off events. [2024-06-21 21:44:05,962 INFO L125 PetriNetUnfolderBase]: For 593827/593851 co-relation queries the response was YES. [2024-06-21 21:44:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57977 conditions, 6746 events. 4240/6746 cut-off events. For 593827/593851 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 41990 event pairs, 949 based on Foata normal form. 25/6771 useless extension candidates. Maximal degree in co-relation 57803. Up to 6213 conditions per place. [2024-06-21 21:44:06,064 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 470 selfloop transitions, 168 changer transitions 0/642 dead transitions. [2024-06-21 21:44:06,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 642 transitions, 10946 flow [2024-06-21 21:44:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:44:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:44:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 21:44:06,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:44:06,066 INFO L175 Difference]: Start difference. First operand has 392 places, 601 transitions, 9216 flow. Second operand 11 states and 176 transitions. [2024-06-21 21:44:06,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 642 transitions, 10946 flow [2024-06-21 21:44:08,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 642 transitions, 10546 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 21:44:08,055 INFO L231 Difference]: Finished difference. Result has 394 places, 607 transitions, 9353 flow [2024-06-21 21:44:08,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8816, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9353, PETRI_PLACES=394, PETRI_TRANSITIONS=607} [2024-06-21 21:44:08,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:44:08,055 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 607 transitions, 9353 flow [2024-06-21 21:44:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:08,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:08,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:44:08,056 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:08,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1485294059, now seen corresponding path program 3 times [2024-06-21 21:44:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:08,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081354145] [2024-06-21 21:44:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:08,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081354145] [2024-06-21 21:44:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081354145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:10,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830952427] [2024-06-21 21:44:10,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:10,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:10,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 607 transitions, 9353 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-21 21:44:10,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:10,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:10,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:13,907 INFO L124 PetriNetUnfolderBase]: 4234/6738 cut-off events. [2024-06-21 21:44:13,907 INFO L125 PetriNetUnfolderBase]: For 603606/603630 co-relation queries the response was YES. [2024-06-21 21:44:13,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57885 conditions, 6738 events. 4234/6738 cut-off events. For 603606/603630 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 41954 event pairs, 940 based on Foata normal form. 26/6764 useless extension candidates. Maximal degree in co-relation 57710. Up to 6043 conditions per place. [2024-06-21 21:44:14,006 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 448 selfloop transitions, 199 changer transitions 0/651 dead transitions. [2024-06-21 21:44:14,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 651 transitions, 11127 flow [2024-06-21 21:44:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:44:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:44:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-06-21 21:44:14,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 21:44:14,008 INFO L175 Difference]: Start difference. First operand has 394 places, 607 transitions, 9353 flow. Second operand 14 states and 218 transitions. [2024-06-21 21:44:14,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 651 transitions, 11127 flow [2024-06-21 21:44:15,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 651 transitions, 10799 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:15,984 INFO L231 Difference]: Finished difference. Result has 401 places, 607 transitions, 9430 flow [2024-06-21 21:44:15,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9430, PETRI_PLACES=401, PETRI_TRANSITIONS=607} [2024-06-21 21:44:15,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 21:44:15,984 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 607 transitions, 9430 flow [2024-06-21 21:44:15,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-21 21:44:15,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:15,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:15,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:44:15,985 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:15,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:15,985 INFO L85 PathProgramCache]: Analyzing trace with hash -733797035, now seen corresponding path program 5 times [2024-06-21 21:44:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:15,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025812505] [2024-06-21 21:44:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:18,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:18,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025812505] [2024-06-21 21:44:18,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025812505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:18,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:18,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221496948] [2024-06-21 21:44:18,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:18,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:18,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:18,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:18,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 607 transitions, 9430 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:18,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:18,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:18,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:21,723 INFO L124 PetriNetUnfolderBase]: 4262/6788 cut-off events. [2024-06-21 21:44:21,723 INFO L125 PetriNetUnfolderBase]: For 641197/641211 co-relation queries the response was YES. [2024-06-21 21:44:21,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58612 conditions, 6788 events. 4262/6788 cut-off events. For 641197/641211 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42166 event pairs, 970 based on Foata normal form. 22/6810 useless extension candidates. Maximal degree in co-relation 58435. Up to 5853 conditions per place. [2024-06-21 21:44:21,830 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 520 selfloop transitions, 123 changer transitions 0/647 dead transitions. [2024-06-21 21:44:21,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 647 transitions, 11096 flow [2024-06-21 21:44:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 21:44:21,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:44:21,831 INFO L175 Difference]: Start difference. First operand has 401 places, 607 transitions, 9430 flow. Second operand 10 states and 160 transitions. [2024-06-21 21:44:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 647 transitions, 11096 flow [2024-06-21 21:44:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 647 transitions, 10668 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-21 21:44:24,054 INFO L231 Difference]: Finished difference. Result has 397 places, 608 transitions, 9275 flow [2024-06-21 21:44:24,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9275, PETRI_PLACES=397, PETRI_TRANSITIONS=608} [2024-06-21 21:44:24,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 21:44:24,055 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 608 transitions, 9275 flow [2024-06-21 21:44:24,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:24,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:24,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:24,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:44:24,055 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:24,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash 825656085, now seen corresponding path program 6 times [2024-06-21 21:44:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:24,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372728790] [2024-06-21 21:44:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:26,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:26,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372728790] [2024-06-21 21:44:26,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372728790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:26,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:26,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927926922] [2024-06-21 21:44:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:26,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:26,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 608 transitions, 9275 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:26,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:26,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:26,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:29,831 INFO L124 PetriNetUnfolderBase]: 4298/6847 cut-off events. [2024-06-21 21:44:29,831 INFO L125 PetriNetUnfolderBase]: For 658486/658500 co-relation queries the response was YES. [2024-06-21 21:44:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59146 conditions, 6847 events. 4298/6847 cut-off events. For 658486/658500 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42695 event pairs, 1307 based on Foata normal form. 24/6871 useless extension candidates. Maximal degree in co-relation 58968. Up to 6402 conditions per place. [2024-06-21 21:44:29,928 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 545 selfloop transitions, 90 changer transitions 0/639 dead transitions. [2024-06-21 21:44:29,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 639 transitions, 10717 flow [2024-06-21 21:44:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-21 21:44:29,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 21:44:29,930 INFO L175 Difference]: Start difference. First operand has 397 places, 608 transitions, 9275 flow. Second operand 10 states and 152 transitions. [2024-06-21 21:44:29,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 639 transitions, 10717 flow [2024-06-21 21:44:31,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 639 transitions, 10513 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:44:31,757 INFO L231 Difference]: Finished difference. Result has 398 places, 609 transitions, 9281 flow [2024-06-21 21:44:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9072, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9281, PETRI_PLACES=398, PETRI_TRANSITIONS=609} [2024-06-21 21:44:31,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 21:44:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 609 transitions, 9281 flow [2024-06-21 21:44:31,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:31,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:44:31,758 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:31,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:31,759 INFO L85 PathProgramCache]: Analyzing trace with hash 825329655, now seen corresponding path program 7 times [2024-06-21 21:44:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:31,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267058592] [2024-06-21 21:44:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:34,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:34,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267058592] [2024-06-21 21:44:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267058592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:34,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124804237] [2024-06-21 21:44:34,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:34,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:34,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:34,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:34,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 609 transitions, 9281 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:34,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:34,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:34,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:37,595 INFO L124 PetriNetUnfolderBase]: 4326/6891 cut-off events. [2024-06-21 21:44:37,595 INFO L125 PetriNetUnfolderBase]: For 638661/638675 co-relation queries the response was YES. [2024-06-21 21:44:37,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59046 conditions, 6891 events. 4326/6891 cut-off events. For 638661/638675 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42961 event pairs, 1283 based on Foata normal form. 22/6913 useless extension candidates. Maximal degree in co-relation 58869. Up to 6350 conditions per place. [2024-06-21 21:44:37,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 100 changer transitions 0/645 dead transitions. [2024-06-21 21:44:37,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 645 transitions, 10770 flow [2024-06-21 21:44:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:44:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:44:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-21 21:44:37,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-21 21:44:37,704 INFO L175 Difference]: Start difference. First operand has 398 places, 609 transitions, 9281 flow. Second operand 11 states and 166 transitions. [2024-06-21 21:44:37,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 645 transitions, 10770 flow [2024-06-21 21:44:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 645 transitions, 10589 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:44:39,863 INFO L231 Difference]: Finished difference. Result has 400 places, 610 transitions, 9327 flow [2024-06-21 21:44:39,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9100, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9327, PETRI_PLACES=400, PETRI_TRANSITIONS=610} [2024-06-21 21:44:39,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 21:44:39,863 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 610 transitions, 9327 flow [2024-06-21 21:44:39,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:39,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:44:39,864 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:39,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash 151446125, now seen corresponding path program 8 times [2024-06-21 21:44:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:39,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130641955] [2024-06-21 21:44:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:39,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130641955] [2024-06-21 21:44:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130641955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:42,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:42,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895348700] [2024-06-21 21:44:42,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:42,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:42,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:42,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 610 transitions, 9327 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:42,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:42,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:42,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:45,399 INFO L124 PetriNetUnfolderBase]: 4362/6926 cut-off events. [2024-06-21 21:44:45,399 INFO L125 PetriNetUnfolderBase]: For 645389/645397 co-relation queries the response was YES. [2024-06-21 21:44:45,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59495 conditions, 6926 events. 4362/6926 cut-off events. For 645389/645397 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42952 event pairs, 982 based on Foata normal form. 11/6937 useless extension candidates. Maximal degree in co-relation 59318. Up to 6550 conditions per place. [2024-06-21 21:44:45,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 87 changer transitions 0/631 dead transitions. [2024-06-21 21:44:45,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 631 transitions, 10720 flow [2024-06-21 21:44:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:44:45,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:44:45,496 INFO L175 Difference]: Start difference. First operand has 400 places, 610 transitions, 9327 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:44:45,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 631 transitions, 10720 flow [2024-06-21 21:44:47,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 631 transitions, 10513 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:44:47,437 INFO L231 Difference]: Finished difference. Result has 398 places, 611 transitions, 9322 flow [2024-06-21 21:44:47,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9120, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9322, PETRI_PLACES=398, PETRI_TRANSITIONS=611} [2024-06-21 21:44:47,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 21:44:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 611 transitions, 9322 flow [2024-06-21 21:44:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:47,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:44:47,438 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:47,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash 144883887, now seen corresponding path program 9 times [2024-06-21 21:44:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409653539] [2024-06-21 21:44:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409653539] [2024-06-21 21:44:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409653539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:49,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149552949] [2024-06-21 21:44:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:49,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:49,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 611 transitions, 9322 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:49,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:49,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:49,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:53,180 INFO L124 PetriNetUnfolderBase]: 4385/6965 cut-off events. [2024-06-21 21:44:53,180 INFO L125 PetriNetUnfolderBase]: For 638655/638663 co-relation queries the response was YES. [2024-06-21 21:44:53,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59433 conditions, 6965 events. 4385/6965 cut-off events. For 638655/638663 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43242 event pairs, 983 based on Foata normal form. 11/6976 useless extension candidates. Maximal degree in co-relation 59256. Up to 6587 conditions per place. [2024-06-21 21:44:53,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 89 changer transitions 0/635 dead transitions. [2024-06-21 21:44:53,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 635 transitions, 10737 flow [2024-06-21 21:44:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 21:44:53,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-21 21:44:53,290 INFO L175 Difference]: Start difference. First operand has 398 places, 611 transitions, 9322 flow. Second operand 10 states and 146 transitions. [2024-06-21 21:44:53,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 635 transitions, 10737 flow [2024-06-21 21:44:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 635 transitions, 10558 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:55,464 INFO L231 Difference]: Finished difference. Result has 402 places, 612 transitions, 9351 flow [2024-06-21 21:44:55,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9143, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9351, PETRI_PLACES=402, PETRI_TRANSITIONS=612} [2024-06-21 21:44:55,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 21:44:55,465 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 612 transitions, 9351 flow [2024-06-21 21:44:55,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:55,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:55,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:55,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:44:55,466 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:55,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1128902293, now seen corresponding path program 10 times [2024-06-21 21:44:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:55,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224747318] [2024-06-21 21:44:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:55,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:58,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:58,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224747318] [2024-06-21 21:44:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224747318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:58,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:58,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91115388] [2024-06-21 21:44:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:44:58,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 612 transitions, 9351 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:58,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:58,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:44:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:01,385 INFO L124 PetriNetUnfolderBase]: 4367/6937 cut-off events. [2024-06-21 21:45:01,385 INFO L125 PetriNetUnfolderBase]: For 616471/616479 co-relation queries the response was YES. [2024-06-21 21:45:01,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58715 conditions, 6937 events. 4367/6937 cut-off events. For 616471/616479 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43047 event pairs, 973 based on Foata normal form. 9/6946 useless extension candidates. Maximal degree in co-relation 58537. Up to 6465 conditions per place. [2024-06-21 21:45:01,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 95 changer transitions 0/638 dead transitions. [2024-06-21 21:45:01,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 638 transitions, 10775 flow [2024-06-21 21:45:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 21:45:01,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-21 21:45:01,479 INFO L175 Difference]: Start difference. First operand has 402 places, 612 transitions, 9351 flow. Second operand 10 states and 148 transitions. [2024-06-21 21:45:01,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 638 transitions, 10775 flow [2024-06-21 21:45:03,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 638 transitions, 10590 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:03,451 INFO L231 Difference]: Finished difference. Result has 404 places, 612 transitions, 9361 flow [2024-06-21 21:45:03,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9166, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9361, PETRI_PLACES=404, PETRI_TRANSITIONS=612} [2024-06-21 21:45:03,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 21:45:03,451 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 612 transitions, 9361 flow [2024-06-21 21:45:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:03,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:45:03,452 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1631686973, now seen corresponding path program 4 times [2024-06-21 21:45:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709942879] [2024-06-21 21:45:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709942879] [2024-06-21 21:45:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709942879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810036508] [2024-06-21 21:45:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:06,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:06,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 612 transitions, 9361 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:06,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:06,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:06,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:08,581 INFO L124 PetriNetUnfolderBase]: 4372/6960 cut-off events. [2024-06-21 21:45:08,581 INFO L125 PetriNetUnfolderBase]: For 605675/605714 co-relation queries the response was YES. [2024-06-21 21:45:08,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58939 conditions, 6960 events. 4372/6960 cut-off events. For 605675/605714 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 43496 event pairs, 1160 based on Foata normal form. 40/7000 useless extension candidates. Maximal degree in co-relation 58760. Up to 6504 conditions per place. [2024-06-21 21:45:08,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 537 selfloop transitions, 103 changer transitions 0/644 dead transitions. [2024-06-21 21:45:08,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 644 transitions, 10853 flow [2024-06-21 21:45:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:45:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:45:08,692 INFO L175 Difference]: Start difference. First operand has 404 places, 612 transitions, 9361 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:45:08,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 644 transitions, 10853 flow [2024-06-21 21:45:10,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 644 transitions, 10594 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 21:45:10,697 INFO L231 Difference]: Finished difference. Result has 403 places, 615 transitions, 9422 flow [2024-06-21 21:45:10,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9102, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9422, PETRI_PLACES=403, PETRI_TRANSITIONS=615} [2024-06-21 21:45:10,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 21:45:10,698 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 615 transitions, 9422 flow [2024-06-21 21:45:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:45:10,698 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:10,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 648290205, now seen corresponding path program 5 times [2024-06-21 21:45:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:10,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278659344] [2024-06-21 21:45:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278659344] [2024-06-21 21:45:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278659344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:13,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:13,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:13,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043814153] [2024-06-21 21:45:13,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:13,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:13,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:13,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 615 transitions, 9422 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:13,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:13,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:15,814 INFO L124 PetriNetUnfolderBase]: 4382/6974 cut-off events. [2024-06-21 21:45:15,814 INFO L125 PetriNetUnfolderBase]: For 622575/622614 co-relation queries the response was YES. [2024-06-21 21:45:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59441 conditions, 6974 events. 4382/6974 cut-off events. For 622575/622614 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43556 event pairs, 991 based on Foata normal form. 41/7015 useless extension candidates. Maximal degree in co-relation 59261. Up to 6442 conditions per place. [2024-06-21 21:45:15,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 476 selfloop transitions, 166 changer transitions 0/646 dead transitions. [2024-06-21 21:45:15,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 646 transitions, 10988 flow [2024-06-21 21:45:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:45:15,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:45:15,905 INFO L175 Difference]: Start difference. First operand has 403 places, 615 transitions, 9422 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:45:15,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 646 transitions, 10988 flow [2024-06-21 21:45:17,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 646 transitions, 10708 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:17,651 INFO L231 Difference]: Finished difference. Result has 405 places, 621 transitions, 9685 flow [2024-06-21 21:45:17,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9142, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9685, PETRI_PLACES=405, PETRI_TRANSITIONS=621} [2024-06-21 21:45:17,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 21:45:17,651 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 621 transitions, 9685 flow [2024-06-21 21:45:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:17,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:17,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:45:17,652 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 648290391, now seen corresponding path program 4 times [2024-06-21 21:45:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726167363] [2024-06-21 21:45:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:20,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726167363] [2024-06-21 21:45:20,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726167363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:20,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:20,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033120963] [2024-06-21 21:45:20,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:20,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:20,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:20,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 621 transitions, 9685 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:20,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:20,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:20,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:23,738 INFO L124 PetriNetUnfolderBase]: 4418/7024 cut-off events. [2024-06-21 21:45:23,738 INFO L125 PetriNetUnfolderBase]: For 651823/651862 co-relation queries the response was YES. [2024-06-21 21:45:23,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60387 conditions, 7024 events. 4418/7024 cut-off events. For 651823/651862 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43898 event pairs, 974 based on Foata normal form. 43/7067 useless extension candidates. Maximal degree in co-relation 60206. Up to 6292 conditions per place. [2024-06-21 21:45:23,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 220 changer transitions 0/664 dead transitions. [2024-06-21 21:45:23,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 664 transitions, 11675 flow [2024-06-21 21:45:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:45:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:45:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-21 21:45:23,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-21 21:45:23,848 INFO L175 Difference]: Start difference. First operand has 405 places, 621 transitions, 9685 flow. Second operand 11 states and 172 transitions. [2024-06-21 21:45:23,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 664 transitions, 11675 flow [2024-06-21 21:45:25,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 664 transitions, 11218 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:25,958 INFO L231 Difference]: Finished difference. Result has 410 places, 630 transitions, 9869 flow [2024-06-21 21:45:25,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9232, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9869, PETRI_PLACES=410, PETRI_TRANSITIONS=630} [2024-06-21 21:45:25,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 21:45:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 630 transitions, 9869 flow [2024-06-21 21:45:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:25,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:25,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:45:25,959 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 825659061, now seen corresponding path program 5 times [2024-06-21 21:45:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341787838] [2024-06-21 21:45:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:28,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:28,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341787838] [2024-06-21 21:45:28,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341787838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:28,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:28,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:28,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145560541] [2024-06-21 21:45:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:28,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:28,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:28,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:28,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 630 transitions, 9869 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:28,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:28,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:28,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:32,118 INFO L124 PetriNetUnfolderBase]: 4460/7083 cut-off events. [2024-06-21 21:45:32,118 INFO L125 PetriNetUnfolderBase]: For 660304/660343 co-relation queries the response was YES. [2024-06-21 21:45:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61270 conditions, 7083 events. 4460/7083 cut-off events. For 660304/660343 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 44187 event pairs, 976 based on Foata normal form. 41/7124 useless extension candidates. Maximal degree in co-relation 61088. Up to 6332 conditions per place. [2024-06-21 21:45:32,213 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 225 changer transitions 0/666 dead transitions. [2024-06-21 21:45:32,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 666 transitions, 11837 flow [2024-06-21 21:45:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 21:45:32,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-21 21:45:32,214 INFO L175 Difference]: Start difference. First operand has 410 places, 630 transitions, 9869 flow. Second operand 10 states and 158 transitions. [2024-06-21 21:45:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 666 transitions, 11837 flow [2024-06-21 21:45:34,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 666 transitions, 11362 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:34,249 INFO L231 Difference]: Finished difference. Result has 412 places, 639 transitions, 10058 flow [2024-06-21 21:45:34,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10058, PETRI_PLACES=412, PETRI_TRANSITIONS=639} [2024-06-21 21:45:34,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 21:45:34,249 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 639 transitions, 10058 flow [2024-06-21 21:45:34,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:34,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:34,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:34,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:45:34,250 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:34,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 825421911, now seen corresponding path program 6 times [2024-06-21 21:45:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:34,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17155192] [2024-06-21 21:45:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:34,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:36,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17155192] [2024-06-21 21:45:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17155192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:36,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:36,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985493899] [2024-06-21 21:45:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:36,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:36,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:36,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 639 transitions, 10058 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:36,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:36,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:36,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:40,511 INFO L124 PetriNetUnfolderBase]: 4454/7077 cut-off events. [2024-06-21 21:45:40,512 INFO L125 PetriNetUnfolderBase]: For 652990/653029 co-relation queries the response was YES. [2024-06-21 21:45:40,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60924 conditions, 7077 events. 4454/7077 cut-off events. For 652990/653029 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 44238 event pairs, 975 based on Foata normal form. 41/7118 useless extension candidates. Maximal degree in co-relation 60742. Up to 6327 conditions per place. [2024-06-21 21:45:40,624 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 229 changer transitions 0/669 dead transitions. [2024-06-21 21:45:40,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 669 transitions, 11846 flow [2024-06-21 21:45:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:45:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:45:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-21 21:45:40,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35912698412698413 [2024-06-21 21:45:40,625 INFO L175 Difference]: Start difference. First operand has 412 places, 639 transitions, 10058 flow. Second operand 12 states and 181 transitions. [2024-06-21 21:45:40,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 669 transitions, 11846 flow [2024-06-21 21:45:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 669 transitions, 11433 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 21:45:43,056 INFO L231 Difference]: Finished difference. Result has 417 places, 639 transitions, 10119 flow [2024-06-21 21:45:43,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10119, PETRI_PLACES=417, PETRI_TRANSITIONS=639} [2024-06-21 21:45:43,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 21:45:43,056 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 639 transitions, 10119 flow [2024-06-21 21:45:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:43,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:43,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:43,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:45:43,057 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:43,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash 825421725, now seen corresponding path program 6 times [2024-06-21 21:45:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:43,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359564995] [2024-06-21 21:45:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:45,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:45,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359564995] [2024-06-21 21:45:45,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359564995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:45,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264245302] [2024-06-21 21:45:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:45,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:45,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:45,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 639 transitions, 10119 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:45,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:45,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:45,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:48,497 INFO L124 PetriNetUnfolderBase]: 4464/7087 cut-off events. [2024-06-21 21:45:48,497 INFO L125 PetriNetUnfolderBase]: For 649461/649485 co-relation queries the response was YES. [2024-06-21 21:45:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61104 conditions, 7087 events. 4464/7087 cut-off events. For 649461/649485 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44334 event pairs, 990 based on Foata normal form. 25/7112 useless extension candidates. Maximal degree in co-relation 60922. Up to 6565 conditions per place. [2024-06-21 21:45:48,591 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 511 selfloop transitions, 161 changer transitions 0/676 dead transitions. [2024-06-21 21:45:48,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 676 transitions, 11682 flow [2024-06-21 21:45:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:45:48,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:45:48,593 INFO L175 Difference]: Start difference. First operand has 417 places, 639 transitions, 10119 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:45:48,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 676 transitions, 11682 flow [2024-06-21 21:45:50,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 676 transitions, 11181 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-21 21:45:50,893 INFO L231 Difference]: Finished difference. Result has 416 places, 645 transitions, 10091 flow [2024-06-21 21:45:50,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9618, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10091, PETRI_PLACES=416, PETRI_TRANSITIONS=645} [2024-06-21 21:45:50,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 21:45:50,893 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 645 transitions, 10091 flow [2024-06-21 21:45:50,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:50,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:50,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:45:50,894 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:50,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1491748293, now seen corresponding path program 7 times [2024-06-21 21:45:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:50,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550864205] [2024-06-21 21:45:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:53,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550864205] [2024-06-21 21:45:53,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550864205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:53,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:53,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794620977] [2024-06-21 21:45:53,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:53,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:53,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:53,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:45:53,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 645 transitions, 10091 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:53,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:53,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:45:53,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:56,139 INFO L124 PetriNetUnfolderBase]: 4469/7091 cut-off events. [2024-06-21 21:45:56,139 INFO L125 PetriNetUnfolderBase]: For 649789/649828 co-relation queries the response was YES. [2024-06-21 21:45:56,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61049 conditions, 7091 events. 4469/7091 cut-off events. For 649789/649828 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 44226 event pairs, 1189 based on Foata normal form. 40/7131 useless extension candidates. Maximal degree in co-relation 60867. Up to 6722 conditions per place. [2024-06-21 21:45:56,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 70 changer transitions 0/672 dead transitions. [2024-06-21 21:45:56,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 672 transitions, 11631 flow [2024-06-21 21:45:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:45:56,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:45:56,253 INFO L175 Difference]: Start difference. First operand has 416 places, 645 transitions, 10091 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:45:56,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 672 transitions, 11631 flow [2024-06-21 21:45:58,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 672 transitions, 11237 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:58,362 INFO L231 Difference]: Finished difference. Result has 415 places, 648 transitions, 9956 flow [2024-06-21 21:45:58,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9699, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9956, PETRI_PLACES=415, PETRI_TRANSITIONS=648} [2024-06-21 21:45:58,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 21:45:58,363 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 648 transitions, 9956 flow [2024-06-21 21:45:58,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:58,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:58,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:45:58,363 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash 519314397, now seen corresponding path program 8 times [2024-06-21 21:45:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490083529] [2024-06-21 21:45:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:00,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:00,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490083529] [2024-06-21 21:46:00,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490083529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:00,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:00,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:00,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079506104] [2024-06-21 21:46:00,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:00,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:00,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:00,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:00,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 648 transitions, 9956 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:00,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:00,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:03,507 INFO L124 PetriNetUnfolderBase]: 4471/7094 cut-off events. [2024-06-21 21:46:03,507 INFO L125 PetriNetUnfolderBase]: For 663847/663886 co-relation queries the response was YES. [2024-06-21 21:46:03,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61239 conditions, 7094 events. 4471/7094 cut-off events. For 663847/663886 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44261 event pairs, 1001 based on Foata normal form. 41/7135 useless extension candidates. Maximal degree in co-relation 61056. Up to 6671 conditions per place. [2024-06-21 21:46:03,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 115 changer transitions 0/671 dead transitions. [2024-06-21 21:46:03,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 671 transitions, 11482 flow [2024-06-21 21:46:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:46:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:46:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:46:03,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 21:46:03,608 INFO L175 Difference]: Start difference. First operand has 415 places, 648 transitions, 9956 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:46:03,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 671 transitions, 11482 flow [2024-06-21 21:46:05,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 671 transitions, 11199 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 21:46:05,913 INFO L231 Difference]: Finished difference. Result has 417 places, 651 transitions, 10031 flow [2024-06-21 21:46:05,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9673, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10031, PETRI_PLACES=417, PETRI_TRANSITIONS=651} [2024-06-21 21:46:05,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 21:46:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 651 transitions, 10031 flow [2024-06-21 21:46:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:46:05,914 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:05,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 519314583, now seen corresponding path program 7 times [2024-06-21 21:46:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:05,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920433830] [2024-06-21 21:46:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:08,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920433830] [2024-06-21 21:46:08,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920433830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:08,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:08,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011793796] [2024-06-21 21:46:08,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:08,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:08,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:08,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 651 transitions, 10031 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:08,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:08,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:08,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:11,449 INFO L124 PetriNetUnfolderBase]: 4459/7082 cut-off events. [2024-06-21 21:46:11,449 INFO L125 PetriNetUnfolderBase]: For 668374/668413 co-relation queries the response was YES. [2024-06-21 21:46:11,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60973 conditions, 7082 events. 4459/7082 cut-off events. For 668374/668413 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44290 event pairs, 980 based on Foata normal form. 43/7125 useless extension candidates. Maximal degree in co-relation 60789. Up to 6532 conditions per place. [2024-06-21 21:46:11,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 153 changer transitions 0/676 dead transitions. [2024-06-21 21:46:11,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 676 transitions, 11663 flow [2024-06-21 21:46:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:46:11,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:46:11,564 INFO L175 Difference]: Start difference. First operand has 417 places, 651 transitions, 10031 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:46:11,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 676 transitions, 11663 flow [2024-06-21 21:46:13,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 676 transitions, 11279 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 21:46:14,004 INFO L231 Difference]: Finished difference. Result has 420 places, 651 transitions, 9981 flow [2024-06-21 21:46:14,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9647, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9981, PETRI_PLACES=420, PETRI_TRANSITIONS=651} [2024-06-21 21:46:14,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 21:46:14,005 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 651 transitions, 9981 flow [2024-06-21 21:46:14,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:14,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:14,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:14,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:46:14,005 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:14,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash 524556807, now seen corresponding path program 9 times [2024-06-21 21:46:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:14,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794120955] [2024-06-21 21:46:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:17,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:17,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794120955] [2024-06-21 21:46:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794120955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:17,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:17,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:17,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548686127] [2024-06-21 21:46:17,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:17,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:17,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:17,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:17,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 651 transitions, 9981 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:17,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:17,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:17,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:19,765 INFO L124 PetriNetUnfolderBase]: 4464/7095 cut-off events. [2024-06-21 21:46:19,765 INFO L125 PetriNetUnfolderBase]: For 669910/669949 co-relation queries the response was YES. [2024-06-21 21:46:19,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61219 conditions, 7095 events. 4464/7095 cut-off events. For 669910/669949 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44367 event pairs, 1187 based on Foata normal form. 40/7135 useless extension candidates. Maximal degree in co-relation 61034. Up to 6636 conditions per place. [2024-06-21 21:46:19,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 592 selfloop transitions, 87 changer transitions 0/683 dead transitions. [2024-06-21 21:46:19,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 683 transitions, 11567 flow [2024-06-21 21:46:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:46:19,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:46:19,859 INFO L175 Difference]: Start difference. First operand has 420 places, 651 transitions, 9981 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:46:19,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 683 transitions, 11567 flow [2024-06-21 21:46:21,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 683 transitions, 11305 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:21,815 INFO L231 Difference]: Finished difference. Result has 421 places, 654 transitions, 10018 flow [2024-06-21 21:46:21,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9719, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10018, PETRI_PLACES=421, PETRI_TRANSITIONS=654} [2024-06-21 21:46:21,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 21:46:21,816 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 654 transitions, 10018 flow [2024-06-21 21:46:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:21,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:21,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:46:21,816 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:21,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 524855337, now seen corresponding path program 10 times [2024-06-21 21:46:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:21,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701508513] [2024-06-21 21:46:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701508513] [2024-06-21 21:46:24,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701508513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:24,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:24,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128858459] [2024-06-21 21:46:24,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:24,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:24,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 654 transitions, 10018 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:24,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:24,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:24,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:27,148 INFO L124 PetriNetUnfolderBase]: 4469/7104 cut-off events. [2024-06-21 21:46:27,148 INFO L125 PetriNetUnfolderBase]: For 674581/674620 co-relation queries the response was YES. [2024-06-21 21:46:27,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61550 conditions, 7104 events. 4469/7104 cut-off events. For 674581/674620 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44513 event pairs, 1185 based on Foata normal form. 40/7144 useless extension candidates. Maximal degree in co-relation 61365. Up to 6623 conditions per place. [2024-06-21 21:46:27,260 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 583 selfloop transitions, 95 changer transitions 0/682 dead transitions. [2024-06-21 21:46:27,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 682 transitions, 11592 flow [2024-06-21 21:46:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:46:27,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:46:27,261 INFO L175 Difference]: Start difference. First operand has 421 places, 654 transitions, 10018 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:46:27,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 682 transitions, 11592 flow [2024-06-21 21:46:29,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 682 transitions, 11317 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:29,847 INFO L231 Difference]: Finished difference. Result has 423 places, 657 transitions, 10063 flow [2024-06-21 21:46:29,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9743, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10063, PETRI_PLACES=423, PETRI_TRANSITIONS=657} [2024-06-21 21:46:29,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 21:46:29,847 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 657 transitions, 10063 flow [2024-06-21 21:46:29,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:29,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:29,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:29,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:46:29,848 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:29,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 524855709, now seen corresponding path program 1 times [2024-06-21 21:46:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:29,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691937462] [2024-06-21 21:46:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691937462] [2024-06-21 21:46:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691937462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675983163] [2024-06-21 21:46:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:32,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:32,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 657 transitions, 10063 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:32,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:32,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:32,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:35,449 INFO L124 PetriNetUnfolderBase]: 4500/7158 cut-off events. [2024-06-21 21:46:35,449 INFO L125 PetriNetUnfolderBase]: For 706526/706565 co-relation queries the response was YES. [2024-06-21 21:46:35,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62665 conditions, 7158 events. 4500/7158 cut-off events. For 706526/706565 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 44995 event pairs, 1399 based on Foata normal form. 41/7199 useless extension candidates. Maximal degree in co-relation 62479. Up to 6733 conditions per place. [2024-06-21 21:46:35,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 609 selfloop transitions, 86 changer transitions 0/699 dead transitions. [2024-06-21 21:46:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 699 transitions, 12137 flow [2024-06-21 21:46:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:46:35,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 21:46:35,567 INFO L175 Difference]: Start difference. First operand has 423 places, 657 transitions, 10063 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:46:35,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 699 transitions, 12137 flow [2024-06-21 21:46:38,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 699 transitions, 11834 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:38,192 INFO L231 Difference]: Finished difference. Result has 428 places, 673 transitions, 10410 flow [2024-06-21 21:46:38,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9765, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10410, PETRI_PLACES=428, PETRI_TRANSITIONS=673} [2024-06-21 21:46:38,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 21:46:38,192 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 673 transitions, 10410 flow [2024-06-21 21:46:38,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:38,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:38,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:38,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:46:38,193 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:38,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:38,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1501846749, now seen corresponding path program 2 times [2024-06-21 21:46:38,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:38,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485467176] [2024-06-21 21:46:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:38,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485467176] [2024-06-21 21:46:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485467176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:40,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132035874] [2024-06-21 21:46:40,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:40,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:40,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 673 transitions, 10410 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:40,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:43,551 INFO L124 PetriNetUnfolderBase]: 4518/7185 cut-off events. [2024-06-21 21:46:43,552 INFO L125 PetriNetUnfolderBase]: For 727758/727797 co-relation queries the response was YES. [2024-06-21 21:46:43,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63762 conditions, 7185 events. 4518/7185 cut-off events. For 727758/727797 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45210 event pairs, 1392 based on Foata normal form. 32/7217 useless extension candidates. Maximal degree in co-relation 63572. Up to 6787 conditions per place. [2024-06-21 21:46:43,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 597 selfloop transitions, 99 changer transitions 0/700 dead transitions. [2024-06-21 21:46:43,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 700 transitions, 12372 flow [2024-06-21 21:46:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:46:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:46:43,659 INFO L175 Difference]: Start difference. First operand has 428 places, 673 transitions, 10410 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:46:43,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 700 transitions, 12372 flow [2024-06-21 21:46:46,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 700 transitions, 12219 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-21 21:46:46,259 INFO L231 Difference]: Finished difference. Result has 434 places, 683 transitions, 10835 flow [2024-06-21 21:46:46,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10265, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10835, PETRI_PLACES=434, PETRI_TRANSITIONS=683} [2024-06-21 21:46:46,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 21:46:46,260 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 683 transitions, 10835 flow [2024-06-21 21:46:46,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:46,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:46,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:46,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:46:46,260 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:46,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1470560433, now seen corresponding path program 8 times [2024-06-21 21:46:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971010216] [2024-06-21 21:46:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:46,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:48,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971010216] [2024-06-21 21:46:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971010216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:48,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:48,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:48,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353036378] [2024-06-21 21:46:48,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:48,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:48,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:48,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 683 transitions, 10835 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:48,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:48,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:48,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:52,315 INFO L124 PetriNetUnfolderBase]: 4528/7184 cut-off events. [2024-06-21 21:46:52,315 INFO L125 PetriNetUnfolderBase]: For 726401/726440 co-relation queries the response was YES. [2024-06-21 21:46:52,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64101 conditions, 7184 events. 4528/7184 cut-off events. For 726401/726440 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44895 event pairs, 963 based on Foata normal form. 41/7225 useless extension candidates. Maximal degree in co-relation 63909. Up to 6624 conditions per place. [2024-06-21 21:46:52,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 165 changer transitions 0/713 dead transitions. [2024-06-21 21:46:52,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 713 transitions, 12626 flow [2024-06-21 21:46:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 21:46:52,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-21 21:46:52,433 INFO L175 Difference]: Start difference. First operand has 434 places, 683 transitions, 10835 flow. Second operand 10 states and 159 transitions. [2024-06-21 21:46:52,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 713 transitions, 12626 flow [2024-06-21 21:46:55,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 713 transitions, 12308 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:55,293 INFO L231 Difference]: Finished difference. Result has 438 places, 686 transitions, 10933 flow [2024-06-21 21:46:55,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10519, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10933, PETRI_PLACES=438, PETRI_TRANSITIONS=686} [2024-06-21 21:46:55,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 21:46:55,294 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 686 transitions, 10933 flow [2024-06-21 21:46:55,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:55,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:55,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:55,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:46:55,295 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:55,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1470565827, now seen corresponding path program 11 times [2024-06-21 21:46:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448453291] [2024-06-21 21:46:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448453291] [2024-06-21 21:46:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448453291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:57,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136637459] [2024-06-21 21:46:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:57,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:57,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:46:57,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 686 transitions, 10933 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:57,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:57,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:46:57,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:00,781 INFO L124 PetriNetUnfolderBase]: 4533/7191 cut-off events. [2024-06-21 21:47:00,781 INFO L125 PetriNetUnfolderBase]: For 722955/722994 co-relation queries the response was YES. [2024-06-21 21:47:00,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64368 conditions, 7191 events. 4533/7191 cut-off events. For 722955/722994 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 44940 event pairs, 983 based on Foata normal form. 40/7231 useless extension candidates. Maximal degree in co-relation 64176. Up to 6721 conditions per place. [2024-06-21 21:47:00,879 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 146 changer transitions 0/715 dead transitions. [2024-06-21 21:47:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 715 transitions, 12877 flow [2024-06-21 21:47:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:47:00,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 21:47:00,880 INFO L175 Difference]: Start difference. First operand has 438 places, 686 transitions, 10933 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:47:00,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 715 transitions, 12877 flow [2024-06-21 21:47:03,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 715 transitions, 12462 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 21:47:03,676 INFO L231 Difference]: Finished difference. Result has 439 places, 692 transitions, 11118 flow [2024-06-21 21:47:03,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10520, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11118, PETRI_PLACES=439, PETRI_TRANSITIONS=692} [2024-06-21 21:47:03,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 21:47:03,677 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 692 transitions, 11118 flow [2024-06-21 21:47:03,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:03,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:03,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:47:03,678 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:03,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1470560247, now seen corresponding path program 12 times [2024-06-21 21:47:03,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:03,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528257472] [2024-06-21 21:47:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528257472] [2024-06-21 21:47:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528257472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723450092] [2024-06-21 21:47:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:06,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:06,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 692 transitions, 11118 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:06,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:06,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:09,128 INFO L124 PetriNetUnfolderBase]: 4530/7187 cut-off events. [2024-06-21 21:47:09,128 INFO L125 PetriNetUnfolderBase]: For 722329/722368 co-relation queries the response was YES. [2024-06-21 21:47:09,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64434 conditions, 7187 events. 4530/7187 cut-off events. For 722329/722368 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 44912 event pairs, 981 based on Foata normal form. 40/7227 useless extension candidates. Maximal degree in co-relation 64241. Up to 6759 conditions per place. [2024-06-21 21:47:09,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 589 selfloop transitions, 121 changer transitions 0/714 dead transitions. [2024-06-21 21:47:09,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 714 transitions, 12624 flow [2024-06-21 21:47:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 21:47:09,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:47:09,242 INFO L175 Difference]: Start difference. First operand has 439 places, 692 transitions, 11118 flow. Second operand 9 states and 138 transitions. [2024-06-21 21:47:09,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 714 transitions, 12624 flow [2024-06-21 21:47:11,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 714 transitions, 12268 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:11,837 INFO L231 Difference]: Finished difference. Result has 443 places, 692 transitions, 11011 flow [2024-06-21 21:47:11,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10762, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11011, PETRI_PLACES=443, PETRI_TRANSITIONS=692} [2024-06-21 21:47:11,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 21:47:11,838 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 692 transitions, 11011 flow [2024-06-21 21:47:11,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:11,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:11,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:11,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:47:11,839 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:11,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1470571779, now seen corresponding path program 3 times [2024-06-21 21:47:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:11,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100588395] [2024-06-21 21:47:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100588395] [2024-06-21 21:47:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100588395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:14,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:14,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914772884] [2024-06-21 21:47:14,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:14,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 692 transitions, 11011 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:14,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:16,987 INFO L124 PetriNetUnfolderBase]: 4524/7198 cut-off events. [2024-06-21 21:47:16,987 INFO L125 PetriNetUnfolderBase]: For 731817/731856 co-relation queries the response was YES. [2024-06-21 21:47:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 7198 events. 4524/7198 cut-off events. For 731817/731856 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 45313 event pairs, 1389 based on Foata normal form. 32/7230 useless extension candidates. Maximal degree in co-relation 64162. Up to 6859 conditions per place. [2024-06-21 21:47:17,108 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 642 selfloop transitions, 62 changer transitions 0/708 dead transitions. [2024-06-21 21:47:17,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 708 transitions, 12499 flow [2024-06-21 21:47:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 21:47:17,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 21:47:17,110 INFO L175 Difference]: Start difference. First operand has 443 places, 692 transitions, 11011 flow. Second operand 7 states and 109 transitions. [2024-06-21 21:47:17,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 708 transitions, 12499 flow [2024-06-21 21:47:20,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 708 transitions, 12087 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:20,010 INFO L231 Difference]: Finished difference. Result has 442 places, 692 transitions, 10735 flow [2024-06-21 21:47:20,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10599, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10735, PETRI_PLACES=442, PETRI_TRANSITIONS=692} [2024-06-21 21:47:20,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 21:47:20,010 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 692 transitions, 10735 flow [2024-06-21 21:47:20,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:20,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:20,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:20,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:47:20,011 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:20,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash 528580173, now seen corresponding path program 9 times [2024-06-21 21:47:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:20,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782402995] [2024-06-21 21:47:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:22,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782402995] [2024-06-21 21:47:22,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782402995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:22,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:22,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466864718] [2024-06-21 21:47:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:22,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:22,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:22,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 692 transitions, 10735 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:22,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:22,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:22,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:26,277 INFO L124 PetriNetUnfolderBase]: 4518/7169 cut-off events. [2024-06-21 21:47:26,278 INFO L125 PetriNetUnfolderBase]: For 731116/731155 co-relation queries the response was YES. [2024-06-21 21:47:26,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63904 conditions, 7169 events. 4518/7169 cut-off events. For 731116/731155 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 44806 event pairs, 964 based on Foata normal form. 41/7210 useless extension candidates. Maximal degree in co-relation 63708. Up to 6614 conditions per place. [2024-06-21 21:47:26,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 173 changer transitions 0/717 dead transitions. [2024-06-21 21:47:26,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 717 transitions, 12269 flow [2024-06-21 21:47:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 21:47:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:47:26,379 INFO L175 Difference]: Start difference. First operand has 442 places, 692 transitions, 10735 flow. Second operand 10 states and 155 transitions. [2024-06-21 21:47:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 717 transitions, 12269 flow [2024-06-21 21:47:29,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 717 transitions, 12095 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:29,375 INFO L231 Difference]: Finished difference. Result has 447 places, 692 transitions, 10924 flow [2024-06-21 21:47:29,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10561, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10924, PETRI_PLACES=447, PETRI_TRANSITIONS=692} [2024-06-21 21:47:29,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 21:47:29,375 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 692 transitions, 10924 flow [2024-06-21 21:47:29,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:29,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:29,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:47:29,376 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:29,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1129231699, now seen corresponding path program 10 times [2024-06-21 21:47:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:29,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856795895] [2024-06-21 21:47:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:31,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856795895] [2024-06-21 21:47:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856795895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:31,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100554846] [2024-06-21 21:47:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:31,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:31,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:31,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:31,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 692 transitions, 10924 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:31,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:31,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:31,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:35,465 INFO L124 PetriNetUnfolderBase]: 4544/7201 cut-off events. [2024-06-21 21:47:35,466 INFO L125 PetriNetUnfolderBase]: For 755931/755964 co-relation queries the response was YES. [2024-06-21 21:47:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64821 conditions, 7201 events. 4544/7201 cut-off events. For 755931/755964 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44915 event pairs, 1009 based on Foata normal form. 19/7220 useless extension candidates. Maximal degree in co-relation 64624. Up to 6448 conditions per place. [2024-06-21 21:47:35,581 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 237 changer transitions 0/718 dead transitions. [2024-06-21 21:47:35,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 718 transitions, 12938 flow [2024-06-21 21:47:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-21 21:47:35,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 21:47:35,583 INFO L175 Difference]: Start difference. First operand has 447 places, 692 transitions, 10924 flow. Second operand 10 states and 152 transitions. [2024-06-21 21:47:35,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 718 transitions, 12938 flow [2024-06-21 21:47:38,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 718 transitions, 12504 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:47:38,775 INFO L231 Difference]: Finished difference. Result has 446 places, 698 transitions, 11099 flow [2024-06-21 21:47:38,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10494, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11099, PETRI_PLACES=446, PETRI_TRANSITIONS=698} [2024-06-21 21:47:38,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 21:47:38,776 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 698 transitions, 11099 flow [2024-06-21 21:47:38,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:38,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:38,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:38,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:47:38,776 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:38,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1139956459, now seen corresponding path program 11 times [2024-06-21 21:47:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48013430] [2024-06-21 21:47:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:41,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:41,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48013430] [2024-06-21 21:47:41,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48013430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:41,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:41,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954428135] [2024-06-21 21:47:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:41,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:41,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:41,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 698 transitions, 11099 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:41,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:41,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:41,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:44,580 INFO L124 PetriNetUnfolderBase]: 4538/7193 cut-off events. [2024-06-21 21:47:44,581 INFO L125 PetriNetUnfolderBase]: For 747215/747248 co-relation queries the response was YES. [2024-06-21 21:47:44,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64670 conditions, 7193 events. 4538/7193 cut-off events. For 747215/747248 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44866 event pairs, 1011 based on Foata normal form. 19/7212 useless extension candidates. Maximal degree in co-relation 64473. Up to 6443 conditions per place. [2024-06-21 21:47:44,699 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 231 changer transitions 0/714 dead transitions. [2024-06-21 21:47:44,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 714 transitions, 12775 flow [2024-06-21 21:47:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:47:44,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:47:44,700 INFO L175 Difference]: Start difference. First operand has 446 places, 698 transitions, 11099 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:47:44,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 714 transitions, 12775 flow [2024-06-21 21:47:47,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 714 transitions, 12233 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:47,639 INFO L231 Difference]: Finished difference. Result has 447 places, 698 transitions, 11026 flow [2024-06-21 21:47:47,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10557, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11026, PETRI_PLACES=447, PETRI_TRANSITIONS=698} [2024-06-21 21:47:47,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 21:47:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 698 transitions, 11026 flow [2024-06-21 21:47:47,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:47,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:47,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:47:47,641 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:47,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash 144649713, now seen corresponding path program 12 times [2024-06-21 21:47:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:47,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024368754] [2024-06-21 21:47:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:50,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024368754] [2024-06-21 21:47:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024368754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:50,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:50,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280966729] [2024-06-21 21:47:50,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:50,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:50,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:50,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 698 transitions, 11026 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:50,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:50,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:50,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:54,217 INFO L124 PetriNetUnfolderBase]: 4532/7185 cut-off events. [2024-06-21 21:47:54,217 INFO L125 PetriNetUnfolderBase]: For 750122/750155 co-relation queries the response was YES. [2024-06-21 21:47:54,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64424 conditions, 7185 events. 4532/7185 cut-off events. For 750122/750155 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44877 event pairs, 1008 based on Foata normal form. 19/7204 useless extension candidates. Maximal degree in co-relation 64226. Up to 6438 conditions per place. [2024-06-21 21:47:54,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 241 changer transitions 0/717 dead transitions. [2024-06-21 21:47:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 717 transitions, 12532 flow [2024-06-21 21:47:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:47:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:47:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-21 21:47:54,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463203463203463 [2024-06-21 21:47:54,325 INFO L175 Difference]: Start difference. First operand has 447 places, 698 transitions, 11026 flow. Second operand 11 states and 160 transitions. [2024-06-21 21:47:54,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 717 transitions, 12532 flow [2024-06-21 21:47:57,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 717 transitions, 12023 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:57,684 INFO L231 Difference]: Finished difference. Result has 451 places, 698 transitions, 11006 flow [2024-06-21 21:47:57,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10517, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11006, PETRI_PLACES=451, PETRI_TRANSITIONS=698} [2024-06-21 21:47:57,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 21:47:57,685 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 698 transitions, 11006 flow [2024-06-21 21:47:57,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:57,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:57,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:57,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:47:57,685 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:57,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash 144649527, now seen corresponding path program 13 times [2024-06-21 21:47:57,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651177756] [2024-06-21 21:47:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:57,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651177756] [2024-06-21 21:47:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651177756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:59,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323734084] [2024-06-21 21:47:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:59,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:47:59,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 698 transitions, 11006 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:59,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:59,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:47:59,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:02,679 INFO L124 PetriNetUnfolderBase]: 4537/7192 cut-off events. [2024-06-21 21:48:02,679 INFO L125 PetriNetUnfolderBase]: For 758603/758636 co-relation queries the response was YES. [2024-06-21 21:48:02,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64669 conditions, 7192 events. 4537/7192 cut-off events. For 758603/758636 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44870 event pairs, 1016 based on Foata normal form. 18/7210 useless extension candidates. Maximal degree in co-relation 64470. Up to 6670 conditions per place. [2024-06-21 21:48:02,807 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 163 changer transitions 0/713 dead transitions. [2024-06-21 21:48:02,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 713 transitions, 12588 flow [2024-06-21 21:48:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 21:48:02,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-21 21:48:02,808 INFO L175 Difference]: Start difference. First operand has 451 places, 698 transitions, 11006 flow. Second operand 8 states and 119 transitions. [2024-06-21 21:48:02,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 713 transitions, 12588 flow [2024-06-21 21:48:06,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 713 transitions, 12048 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 21:48:06,084 INFO L231 Difference]: Finished difference. Result has 448 places, 701 transitions, 10935 flow [2024-06-21 21:48:06,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10468, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10935, PETRI_PLACES=448, PETRI_TRANSITIONS=701} [2024-06-21 21:48:06,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-21 21:48:06,085 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 701 transitions, 10935 flow [2024-06-21 21:48:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:06,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:06,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:06,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:48:06,085 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:06,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash 156008361, now seen corresponding path program 1 times [2024-06-21 21:48:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:06,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633048099] [2024-06-21 21:48:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:06,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:09,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:09,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633048099] [2024-06-21 21:48:09,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633048099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:09,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:09,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164494248] [2024-06-21 21:48:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:09,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:09,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:48:09,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 701 transitions, 10935 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:09,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:09,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:48:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:12,949 INFO L124 PetriNetUnfolderBase]: 4557/7216 cut-off events. [2024-06-21 21:48:12,949 INFO L125 PetriNetUnfolderBase]: For 777594/777602 co-relation queries the response was YES. [2024-06-21 21:48:13,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64425 conditions, 7216 events. 4557/7216 cut-off events. For 777594/777602 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44893 event pairs, 977 based on Foata normal form. 7/7223 useless extension candidates. Maximal degree in co-relation 64225. Up to 6650 conditions per place. [2024-06-21 21:48:13,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 632 selfloop transitions, 92 changer transitions 0/728 dead transitions. [2024-06-21 21:48:13,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 728 transitions, 12607 flow [2024-06-21 21:48:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:48:13,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:48:13,060 INFO L175 Difference]: Start difference. First operand has 448 places, 701 transitions, 10935 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:48:13,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 728 transitions, 12607 flow [2024-06-21 21:48:15,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 728 transitions, 12176 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:15,993 INFO L231 Difference]: Finished difference. Result has 451 places, 705 transitions, 10768 flow [2024-06-21 21:48:15,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10504, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10768, PETRI_PLACES=451, PETRI_TRANSITIONS=705} [2024-06-21 21:48:15,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 21:48:15,994 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 705 transitions, 10768 flow [2024-06-21 21:48:15,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:15,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:15,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:15,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:48:15,994 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:15,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 431619215, now seen corresponding path program 14 times [2024-06-21 21:48:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284968163] [2024-06-21 21:48:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284968163] [2024-06-21 21:48:18,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284968163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:18,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:18,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415618507] [2024-06-21 21:48:18,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:18,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:18,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:48:18,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 705 transitions, 10768 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:18,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:18,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:48:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:21,482 INFO L124 PetriNetUnfolderBase]: 4554/7229 cut-off events. [2024-06-21 21:48:21,482 INFO L125 PetriNetUnfolderBase]: For 763532/763571 co-relation queries the response was YES. [2024-06-21 21:48:21,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64388 conditions, 7229 events. 4554/7229 cut-off events. For 763532/763571 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45327 event pairs, 988 based on Foata normal form. 40/7269 useless extension candidates. Maximal degree in co-relation 64186. Up to 6691 conditions per place. [2024-06-21 21:48:21,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 550 selfloop transitions, 173 changer transitions 0/727 dead transitions. [2024-06-21 21:48:21,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 727 transitions, 12406 flow [2024-06-21 21:48:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:48:21,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:48:21,611 INFO L175 Difference]: Start difference. First operand has 451 places, 705 transitions, 10768 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:48:21,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 727 transitions, 12406 flow [2024-06-21 21:48:24,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 727 transitions, 12284 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:48:24,771 INFO L231 Difference]: Finished difference. Result has 455 places, 708 transitions, 11150 flow [2024-06-21 21:48:24,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10646, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11150, PETRI_PLACES=455, PETRI_TRANSITIONS=708} [2024-06-21 21:48:24,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-21 21:48:24,772 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 708 transitions, 11150 flow [2024-06-21 21:48:24,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:24,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:24,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:24,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:48:24,773 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:24,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:24,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2136275667, now seen corresponding path program 11 times [2024-06-21 21:48:24,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:24,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197148857] [2024-06-21 21:48:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:24,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:27,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:27,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197148857] [2024-06-21 21:48:27,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197148857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:27,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:27,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497172760] [2024-06-21 21:48:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:27,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:27,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:48:27,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 708 transitions, 11150 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:27,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:27,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:48:27,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:30,596 INFO L124 PetriNetUnfolderBase]: 4564/7234 cut-off events. [2024-06-21 21:48:30,597 INFO L125 PetriNetUnfolderBase]: For 800518/800526 co-relation queries the response was YES. [2024-06-21 21:48:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64761 conditions, 7234 events. 4564/7234 cut-off events. For 800518/800526 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 45122 event pairs, 978 based on Foata normal form. 11/7245 useless extension candidates. Maximal degree in co-relation 64557. Up to 6836 conditions per place. [2024-06-21 21:48:30,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 637 selfloop transitions, 91 changer transitions 0/732 dead transitions. [2024-06-21 21:48:30,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 732 transitions, 12782 flow [2024-06-21 21:48:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 21:48:30,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:48:30,719 INFO L175 Difference]: Start difference. First operand has 455 places, 708 transitions, 11150 flow. Second operand 9 states and 135 transitions. [2024-06-21 21:48:30,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 732 transitions, 12782 flow [2024-06-21 21:48:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 732 transitions, 12338 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 21:48:34,069 INFO L231 Difference]: Finished difference. Result has 457 places, 709 transitions, 10913 flow [2024-06-21 21:48:34,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10706, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10913, PETRI_PLACES=457, PETRI_TRANSITIONS=709} [2024-06-21 21:48:34,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-21 21:48:34,070 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 709 transitions, 10913 flow [2024-06-21 21:48:34,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:34,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:34,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:34,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:48:34,071 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:34,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2010359237, now seen corresponding path program 4 times [2024-06-21 21:48:34,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:34,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674620463] [2024-06-21 21:48:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674620463] [2024-06-21 21:48:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674620463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086109667] [2024-06-21 21:48:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:37,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:37,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:48:37,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 709 transitions, 10913 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:37,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:37,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:48:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:40,350 INFO L124 PetriNetUnfolderBase]: 4579/7288 cut-off events. [2024-06-21 21:48:40,350 INFO L125 PetriNetUnfolderBase]: For 764556/764595 co-relation queries the response was YES. [2024-06-21 21:48:40,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64794 conditions, 7288 events. 4579/7288 cut-off events. For 764556/764595 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45953 event pairs, 1394 based on Foata normal form. 41/7329 useless extension candidates. Maximal degree in co-relation 64590. Up to 6964 conditions per place. [2024-06-21 21:48:40,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 690 selfloop transitions, 42 changer transitions 0/736 dead transitions. [2024-06-21 21:48:40,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 736 transitions, 12581 flow [2024-06-21 21:48:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:48:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:48:40,476 INFO L175 Difference]: Start difference. First operand has 457 places, 709 transitions, 10913 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:48:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 736 transitions, 12581 flow [2024-06-21 21:48:43,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 736 transitions, 12390 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:48:43,969 INFO L231 Difference]: Finished difference. Result has 459 places, 715 transitions, 10956 flow [2024-06-21 21:48:43,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10722, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10956, PETRI_PLACES=459, PETRI_TRANSITIONS=715} [2024-06-21 21:48:43,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-21 21:48:43,970 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 715 transitions, 10956 flow [2024-06-21 21:48:43,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:43,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:43,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:48:43,971 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:43,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash 286795229, now seen corresponding path program 5 times [2024-06-21 21:48:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964457400] [2024-06-21 21:48:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:47,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:47,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964457400] [2024-06-21 21:48:47,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964457400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:47,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:47,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954049492] [2024-06-21 21:48:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:47,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:48:47,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 715 transitions, 10956 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:47,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:47,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:48:47,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:50,082 INFO L124 PetriNetUnfolderBase]: 4589/7302 cut-off events. [2024-06-21 21:48:50,082 INFO L125 PetriNetUnfolderBase]: For 778398/778429 co-relation queries the response was YES. [2024-06-21 21:48:50,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65152 conditions, 7302 events. 4589/7302 cut-off events. For 778398/778429 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46063 event pairs, 1396 based on Foata normal form. 33/7335 useless extension candidates. Maximal degree in co-relation 64946. Up to 6967 conditions per place. [2024-06-21 21:48:50,196 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 681 selfloop transitions, 50 changer transitions 0/735 dead transitions. [2024-06-21 21:48:50,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 735 transitions, 12590 flow [2024-06-21 21:48:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:48:50,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 21:48:50,198 INFO L175 Difference]: Start difference. First operand has 459 places, 715 transitions, 10956 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:48:50,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 735 transitions, 12590 flow Killed by 15