./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_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/protection/safe008_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe008_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe008_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-7724a2d-m [2024-06-27 21:00:14,650 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:00:14,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:00:14,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:00:14,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:00:14,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:00:14,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:00:14,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:00:14,710 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:00:14,710 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:00:14,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:00:14,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:00:14,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:00:14,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:00:14,711 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:00:14,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:00:14,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:00:14,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:00:14,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:00:14,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:00:14,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:00:14,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:00:14,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:00:14,714 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:00:14,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:00:14,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:00:14,715 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:00:14,715 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:00:14,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:00:14,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:00:14,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:00:14,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:00:14,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:00:14,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:00:14,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:00:14,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:00:14,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:00:14,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:00:14,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:00:14,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:00:14,717 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:00:14,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:00:14,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:00:14,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:00:14,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:00:14,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:00:14,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:00:14,957 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:00:14,958 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:00:14,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe008_power.opt.yml/witness.yml [2024-06-27 21:00:15,150 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:00:15,151 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:00:15,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-27 21:00:16,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:00:16,333 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:00:16,333 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-27 21:00:16,347 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8629ccd31/593de699c81a4c63b1361449973848fe/FLAGead14eabb [2024-06-27 21:00:16,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8629ccd31/593de699c81a4c63b1361449973848fe [2024-06-27 21:00:16,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:00:16,363 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:00:16,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:00:16,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:00:16,368 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:00:16,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:15" (1/2) ... [2024-06-27 21:00:16,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6035ba5d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:00:16, skipping insertion in model container [2024-06-27 21:00:16,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:15" (1/2) ... [2024-06-27 21:00:16,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@463fff77 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:00:16, skipping insertion in model container [2024-06-27 21:00:16,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:00:16" (2/2) ... [2024-06-27 21:00:16,371 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6035ba5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:16, skipping insertion in model container [2024-06-27 21:00:16,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:00:16" (2/2) ... [2024-06-27 21:00:16,372 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:00:16,477 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:00:16,478 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 21:00:16,478 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 21:00:16,478 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 21:00:16,478 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:00:16,478 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 21:00:16,514 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:00:16,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:00:16,880 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:00:16,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:00:17,052 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:00:17,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17 WrapperNode [2024-06-27 21:00:17,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:00:17,053 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:00:17,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:00:17,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:00:17,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,110 INFO L138 Inliner]: procedures = 175, calls = 74, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 218 [2024-06-27 21:00:17,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:00:17,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:00:17,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:00:17,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:00:17,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,146 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-27 21:00:17,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:00:17,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:00:17,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:00:17,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:00:17,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (1/1) ... [2024-06-27 21:00:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:00:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:00:17,261 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) [2024-06-27 21:00:17,316 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 [2024-06-27 21:00:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:00:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:00:17,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:00:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:00:17,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:00:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:00:17,334 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:00:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:00:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:00:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:00:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:00:17,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:00:17,338 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:00:17,465 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:00:17,467 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:00:17,963 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:00:17,963 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:00:18,268 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:00:18,268 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:00:18,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:00:18 BoogieIcfgContainer [2024-06-27 21:00:18,269 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:00:18,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:00:18,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:00:18,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:00:18,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:15" (1/4) ... [2024-06-27 21:00:18,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77c12d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:00:18, skipping insertion in model container [2024-06-27 21:00:18,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:00:16" (2/4) ... [2024-06-27 21:00:18,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77c12d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:00:18, skipping insertion in model container [2024-06-27 21:00:18,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:17" (3/4) ... [2024-06-27 21:00:18,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77c12d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:00:18, skipping insertion in model container [2024-06-27 21:00:18,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:00:18" (4/4) ... [2024-06-27 21:00:18,276 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.opt.i [2024-06-27 21:00:18,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:00:18,310 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:00:18,311 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:00:18,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:00:18,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:00:18,429 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:00:18,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:00:18,432 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 56 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. [2024-06-27 21:00:18,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:00:18,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:00:18,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:00:18,454 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;@7b8bfc36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:00:18,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:00:18,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:00:18,459 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:00:18,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:00:18,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:18,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:00:18,460 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)] === [2024-06-27 21:00:18,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 779574896, now seen corresponding path program 1 times [2024-06-27 21:00:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056525882] [2024-06-27 21:00:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056525882] [2024-06-27 21:00:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056525882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:19,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:19,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:00:19,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136010582] [2024-06-27 21:00:19,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:19,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:00:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:00:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:00:19,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:00:19,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:19,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:19,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:00:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:20,371 INFO L124 PetriNetUnfolderBase]: 1472/2225 cut-off events. [2024-06-27 21:00:20,372 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 21:00:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 2225 events. 1472/2225 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10215 event pairs, 1009 based on Foata normal form. 1/2183 useless extension candidates. Maximal degree in co-relation 4524. Up to 2210 conditions per place. [2024-06-27 21:00:20,385 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:00:20,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 185 flow [2024-06-27 21:00:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:00:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:00:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-27 21:00:20,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-27 21:00:20,395 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 67 transitions. [2024-06-27 21:00:20,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 185 flow [2024-06-27 21:00:20,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:20,399 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:00:20,400 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} [2024-06-27 21:00:20,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:00:20,403 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:00:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:20,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:20,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:20,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:00:20,404 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)] === [2024-06-27 21:00:20,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1847199599, now seen corresponding path program 1 times [2024-06-27 21:00:20,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552378836] [2024-06-27 21:00:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:20,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:21,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552378836] [2024-06-27 21:00:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552378836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:21,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:00:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020918383] [2024-06-27 21:00:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:00:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:00:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:00:21,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:00:21,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:21,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:21,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:00:21,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:22,063 INFO L124 PetriNetUnfolderBase]: 1480/2236 cut-off events. [2024-06-27 21:00:22,063 INFO L125 PetriNetUnfolderBase]: For 404/412 co-relation queries the response was YES. [2024-06-27 21:00:22,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2236 events. 1480/2236 cut-off events. For 404/412 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10152 event pairs, 881 based on Foata normal form. 8/2242 useless extension candidates. Maximal degree in co-relation 5130. Up to 2173 conditions per place. [2024-06-27 21:00:22,077 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-27 21:00:22,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 298 flow [2024-06-27 21:00:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:00:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:00:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 21:00:22,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 21:00:22,081 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-27 21:00:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 298 flow [2024-06-27 21:00:22,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:22,085 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-27 21:00:22,085 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-27 21:00:22,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-27 21:00:22,088 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-27 21:00:22,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:22,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:22,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:22,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:00:22,094 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)] === [2024-06-27 21:00:22,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1428613846, now seen corresponding path program 1 times [2024-06-27 21:00:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:22,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630118458] [2024-06-27 21:00:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:23,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:23,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630118458] [2024-06-27 21:00:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630118458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:23,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:23,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:00:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075367355] [2024-06-27 21:00:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:23,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:00:23,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:00:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:00:23,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:00:23,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 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) [2024-06-27 21:00:23,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:23,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:00:23,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:23,969 INFO L124 PetriNetUnfolderBase]: 1488/2247 cut-off events. [2024-06-27 21:00:23,969 INFO L125 PetriNetUnfolderBase]: For 1371/1389 co-relation queries the response was YES. [2024-06-27 21:00:23,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6034 conditions, 2247 events. 1488/2247 cut-off events. For 1371/1389 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10191 event pairs, 749 based on Foata normal form. 11/2256 useless extension candidates. Maximal degree in co-relation 6019. Up to 2174 conditions per place. [2024-06-27 21:00:23,981 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-27 21:00:23,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 460 flow [2024-06-27 21:00:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:00:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:00:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-27 21:00:23,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-27 21:00:23,983 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 5 states and 113 transitions. [2024-06-27 21:00:23,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 460 flow [2024-06-27 21:00:23,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 84 transitions, 454 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 21:00:23,986 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 299 flow [2024-06-27 21:00:23,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-06-27 21:00:23,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-27 21:00:23,987 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 299 flow [2024-06-27 21:00:23,987 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) [2024-06-27 21:00:23,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:23,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:23,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:00:23,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:23,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1337357422, now seen corresponding path program 1 times [2024-06-27 21:00:23,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:23,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836787073] [2024-06-27 21:00:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:25,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836787073] [2024-06-27 21:00:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836787073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:25,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:25,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:00:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919537688] [2024-06-27 21:00:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:00:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:00:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:00:25,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:00:25,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 299 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) [2024-06-27 21:00:25,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:25,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:00:25,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:26,130 INFO L124 PetriNetUnfolderBase]: 1496/2258 cut-off events. [2024-06-27 21:00:26,131 INFO L125 PetriNetUnfolderBase]: For 2629/2646 co-relation queries the response was YES. [2024-06-27 21:00:26,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7085 conditions, 2258 events. 1496/2258 cut-off events. For 2629/2646 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10253 event pairs, 619 based on Foata normal form. 11/2267 useless extension candidates. Maximal degree in co-relation 7065. Up to 2155 conditions per place. [2024-06-27 21:00:26,144 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 74 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-27 21:00:26,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 617 flow [2024-06-27 21:00:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 21:00:26,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 21:00:26,146 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 299 flow. Second operand 6 states and 135 transitions. [2024-06-27 21:00:26,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 617 flow [2024-06-27 21:00:26,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 596 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:26,151 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 359 flow [2024-06-27 21:00:26,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-27 21:00:26,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 21:00:26,152 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 359 flow [2024-06-27 21:00:26,152 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) [2024-06-27 21:00:26,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:26,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:26,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:00:26,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:26,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1491591691, now seen corresponding path program 1 times [2024-06-27 21:00:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:26,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953256127] [2024-06-27 21:00:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953256127] [2024-06-27 21:00:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953256127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:27,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655922729] [2024-06-27 21:00:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:27,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:27,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:00:27,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:27,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:27,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:00:27,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:28,668 INFO L124 PetriNetUnfolderBase]: 1547/2339 cut-off events. [2024-06-27 21:00:28,669 INFO L125 PetriNetUnfolderBase]: For 4323/4340 co-relation queries the response was YES. [2024-06-27 21:00:28,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8046 conditions, 2339 events. 1547/2339 cut-off events. For 4323/4340 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10729 event pairs, 480 based on Foata normal form. 24/2361 useless extension candidates. Maximal degree in co-relation 8024. Up to 2126 conditions per place. [2024-06-27 21:00:28,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 84 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2024-06-27 21:00:28,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 110 transitions, 727 flow [2024-06-27 21:00:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 21:00:28,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-27 21:00:28,686 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 359 flow. Second operand 7 states and 155 transitions. [2024-06-27 21:00:28,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 110 transitions, 727 flow [2024-06-27 21:00:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 110 transitions, 678 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:28,692 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 375 flow [2024-06-27 21:00:28,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-27 21:00:28,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 21:00:28,694 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 375 flow [2024-06-27 21:00:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:28,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:28,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:28,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:00:28,695 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)] === [2024-06-27 21:00:28,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2080306900, now seen corresponding path program 1 times [2024-06-27 21:00:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016515907] [2024-06-27 21:00:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:30,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:30,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016515907] [2024-06-27 21:00:30,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016515907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:30,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:30,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:00:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128664315] [2024-06-27 21:00:30,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:30,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:00:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:00:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:00:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:30,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 375 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:30,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:30,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:30,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:31,105 INFO L124 PetriNetUnfolderBase]: 1542/2332 cut-off events. [2024-06-27 21:00:31,106 INFO L125 PetriNetUnfolderBase]: For 5596/5613 co-relation queries the response was YES. [2024-06-27 21:00:31,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8441 conditions, 2332 events. 1542/2332 cut-off events. For 5596/5613 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10635 event pairs, 586 based on Foata normal form. 8/2338 useless extension candidates. Maximal degree in co-relation 8417. Up to 2306 conditions per place. [2024-06-27 21:00:31,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 65 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-27 21:00:31,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 575 flow [2024-06-27 21:00:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:00:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:00:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:00:31,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:00:31,120 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 375 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:00:31,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 575 flow [2024-06-27 21:00:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 532 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:31,125 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 382 flow [2024-06-27 21:00:31,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-27 21:00:31,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 21:00:31,126 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 382 flow [2024-06-27 21:00:31,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:31,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:31,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:00:31,126 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)] === [2024-06-27 21:00:31,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 65006491, now seen corresponding path program 1 times [2024-06-27 21:00:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182536961] [2024-06-27 21:00:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:32,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:32,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182536961] [2024-06-27 21:00:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182536961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:32,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:32,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234298486] [2024-06-27 21:00:32,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:32,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:32,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:00:32,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:32,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:32,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:00:32,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:33,800 INFO L124 PetriNetUnfolderBase]: 1764/2650 cut-off events. [2024-06-27 21:00:33,800 INFO L125 PetriNetUnfolderBase]: For 7333/7333 co-relation queries the response was YES. [2024-06-27 21:00:33,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9722 conditions, 2650 events. 1764/2650 cut-off events. For 7333/7333 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12014 event pairs, 681 based on Foata normal form. 4/2653 useless extension candidates. Maximal degree in co-relation 9696. Up to 2603 conditions per place. [2024-06-27 21:00:33,840 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 78 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2024-06-27 21:00:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 664 flow [2024-06-27 21:00:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 21:00:33,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:00:33,841 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 382 flow. Second operand 6 states and 96 transitions. [2024-06-27 21:00:33,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 664 flow [2024-06-27 21:00:33,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 629 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:33,848 INFO L231 Difference]: Finished difference. Result has 66 places, 72 transitions, 455 flow [2024-06-27 21:00:33,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=66, PETRI_TRANSITIONS=72} [2024-06-27 21:00:33,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 21:00:33,849 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 72 transitions, 455 flow [2024-06-27 21:00:33,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:33,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:33,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:33,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:00:33,850 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)] === [2024-06-27 21:00:33,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2009481427, now seen corresponding path program 1 times [2024-06-27 21:00:33,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:33,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368467435] [2024-06-27 21:00:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:33,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:35,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368467435] [2024-06-27 21:00:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368467435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:35,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687807439] [2024-06-27 21:00:35,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:35,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:35,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:35,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:35,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:35,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:36,703 INFO L124 PetriNetUnfolderBase]: 1733/2612 cut-off events. [2024-06-27 21:00:36,703 INFO L125 PetriNetUnfolderBase]: For 10066/10132 co-relation queries the response was YES. [2024-06-27 21:00:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10485 conditions, 2612 events. 1733/2612 cut-off events. For 10066/10132 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12172 event pairs, 622 based on Foata normal form. 20/2616 useless extension candidates. Maximal degree in co-relation 10456. Up to 2439 conditions per place. [2024-06-27 21:00:36,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 31 changer transitions 0/113 dead transitions. [2024-06-27 21:00:36,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 113 transitions, 875 flow [2024-06-27 21:00:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:00:36,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:00:36,719 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 455 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:00:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 113 transitions, 875 flow [2024-06-27 21:00:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 113 transitions, 867 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:36,728 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 634 flow [2024-06-27 21:00:36,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2024-06-27 21:00:36,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-27 21:00:36,730 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 634 flow [2024-06-27 21:00:36,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:36,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:36,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:00:36,730 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)] === [2024-06-27 21:00:36,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1077705099, now seen corresponding path program 2 times [2024-06-27 21:00:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204487238] [2024-06-27 21:00:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204487238] [2024-06-27 21:00:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204487238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:38,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:38,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820374575] [2024-06-27 21:00:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:38,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:38,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:38,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:38,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:38,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:39,471 INFO L124 PetriNetUnfolderBase]: 1753/2644 cut-off events. [2024-06-27 21:00:39,471 INFO L125 PetriNetUnfolderBase]: For 13496/13575 co-relation queries the response was YES. [2024-06-27 21:00:39,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11650 conditions, 2644 events. 1753/2644 cut-off events. For 13496/13575 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12356 event pairs, 612 based on Foata normal form. 24/2654 useless extension candidates. Maximal degree in co-relation 11617. Up to 2474 conditions per place. [2024-06-27 21:00:39,484 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 29 changer transitions 0/107 dead transitions. [2024-06-27 21:00:39,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 928 flow [2024-06-27 21:00:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:00:39,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:00:39,486 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 634 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:00:39,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 928 flow [2024-06-27 21:00:39,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 888 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:39,495 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 663 flow [2024-06-27 21:00:39,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=663, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-27 21:00:39,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 21:00:39,496 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 663 flow [2024-06-27 21:00:39,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:39,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:39,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:00:39,497 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)] === [2024-06-27 21:00:39,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 46642954, now seen corresponding path program 1 times [2024-06-27 21:00:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929274549] [2024-06-27 21:00:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929274549] [2024-06-27 21:00:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929274549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:41,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:41,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039213676] [2024-06-27 21:00:41,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:41,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:41,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:41,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 663 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) [2024-06-27 21:00:41,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:41,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:41,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:42,353 INFO L124 PetriNetUnfolderBase]: 1809/2733 cut-off events. [2024-06-27 21:00:42,354 INFO L125 PetriNetUnfolderBase]: For 15865/15951 co-relation queries the response was YES. [2024-06-27 21:00:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12318 conditions, 2733 events. 1809/2733 cut-off events. For 15865/15951 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12717 event pairs, 615 based on Foata normal form. 26/2739 useless extension candidates. Maximal degree in co-relation 12282. Up to 2535 conditions per place. [2024-06-27 21:00:42,366 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 100 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-27 21:00:42,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 151 transitions, 1329 flow [2024-06-27 21:00:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:00:42,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:00:42,368 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 663 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:00:42,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 151 transitions, 1329 flow [2024-06-27 21:00:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 151 transitions, 1250 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:42,379 INFO L231 Difference]: Finished difference. Result has 85 places, 112 transitions, 978 flow [2024-06-27 21:00:42,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=85, PETRI_TRANSITIONS=112} [2024-06-27 21:00:42,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 21:00:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 112 transitions, 978 flow [2024-06-27 21:00:42,380 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) [2024-06-27 21:00:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:42,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:00:42,380 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)] === [2024-06-27 21:00:42,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 804481286, now seen corresponding path program 2 times [2024-06-27 21:00:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522232757] [2024-06-27 21:00:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:44,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522232757] [2024-06-27 21:00:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522232757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:44,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736507251] [2024-06-27 21:00:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:44,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:44,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 112 transitions, 978 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) [2024-06-27 21:00:44,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:44,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:44,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:45,522 INFO L124 PetriNetUnfolderBase]: 1852/2794 cut-off events. [2024-06-27 21:00:45,522 INFO L125 PetriNetUnfolderBase]: For 19840/19944 co-relation queries the response was YES. [2024-06-27 21:00:45,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13578 conditions, 2794 events. 1852/2794 cut-off events. For 19840/19944 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13022 event pairs, 601 based on Foata normal form. 42/2816 useless extension candidates. Maximal degree in co-relation 13537. Up to 2515 conditions per place. [2024-06-27 21:00:45,536 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-27 21:00:45,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 156 transitions, 1530 flow [2024-06-27 21:00:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:00:45,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 21:00:45,538 INFO L175 Difference]: Start difference. First operand has 85 places, 112 transitions, 978 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:00:45,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 156 transitions, 1530 flow [2024-06-27 21:00:45,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 156 transitions, 1500 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:45,557 INFO L231 Difference]: Finished difference. Result has 91 places, 120 transitions, 1161 flow [2024-06-27 21:00:45,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1161, PETRI_PLACES=91, PETRI_TRANSITIONS=120} [2024-06-27 21:00:45,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 21:00:45,558 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 120 transitions, 1161 flow [2024-06-27 21:00:45,558 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) [2024-06-27 21:00:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:45,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:00:45,559 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)] === [2024-06-27 21:00:45,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1959880742, now seen corresponding path program 1 times [2024-06-27 21:00:45,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:45,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060077102] [2024-06-27 21:00:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:47,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060077102] [2024-06-27 21:00:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060077102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:47,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046973219] [2024-06-27 21:00:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:47,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:00:47,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 120 transitions, 1161 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:47,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:47,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:00:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:48,687 INFO L124 PetriNetUnfolderBase]: 1992/2986 cut-off events. [2024-06-27 21:00:48,688 INFO L125 PetriNetUnfolderBase]: For 23038/23048 co-relation queries the response was YES. [2024-06-27 21:00:48,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 2986 events. 1992/2986 cut-off events. For 23038/23048 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13666 event pairs, 629 based on Foata normal form. 14/2999 useless extension candidates. Maximal degree in co-relation 14861. Up to 2799 conditions per place. [2024-06-27 21:00:48,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 25 changer transitions 0/171 dead transitions. [2024-06-27 21:00:48,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 171 transitions, 1789 flow [2024-06-27 21:00:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:00:48,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 21:00:48,707 INFO L175 Difference]: Start difference. First operand has 91 places, 120 transitions, 1161 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:00:48,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 171 transitions, 1789 flow [2024-06-27 21:00:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 171 transitions, 1685 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:48,730 INFO L231 Difference]: Finished difference. Result has 96 places, 136 transitions, 1301 flow [2024-06-27 21:00:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1301, PETRI_PLACES=96, PETRI_TRANSITIONS=136} [2024-06-27 21:00:48,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 21:00:48,731 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 136 transitions, 1301 flow [2024-06-27 21:00:48,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:48,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:48,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:48,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:00:48,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:48,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 804601256, now seen corresponding path program 3 times [2024-06-27 21:00:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:48,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451508676] [2024-06-27 21:00:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451508676] [2024-06-27 21:00:50,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451508676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:50,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:50,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:50,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367470490] [2024-06-27 21:00:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:50,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:50,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:50,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 136 transitions, 1301 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) [2024-06-27 21:00:50,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:50,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:50,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:51,714 INFO L124 PetriNetUnfolderBase]: 1957/2948 cut-off events. [2024-06-27 21:00:51,715 INFO L125 PetriNetUnfolderBase]: For 26220/26489 co-relation queries the response was YES. [2024-06-27 21:00:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15643 conditions, 2948 events. 1957/2948 cut-off events. For 26220/26489 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13910 event pairs, 569 based on Foata normal form. 34/2919 useless extension candidates. Maximal degree in co-relation 15596. Up to 2729 conditions per place. [2024-06-27 21:00:51,738 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-27 21:00:51,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 174 transitions, 1829 flow [2024-06-27 21:00:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:00:51,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:00:51,741 INFO L175 Difference]: Start difference. First operand has 96 places, 136 transitions, 1301 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:00:51,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 174 transitions, 1829 flow [2024-06-27 21:00:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 174 transitions, 1797 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:51,771 INFO L231 Difference]: Finished difference. Result has 100 places, 144 transitions, 1487 flow [2024-06-27 21:00:51,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=100, PETRI_TRANSITIONS=144} [2024-06-27 21:00:51,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 21:00:51,772 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 144 transitions, 1487 flow [2024-06-27 21:00:51,772 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) [2024-06-27 21:00:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:00:51,773 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)] === [2024-06-27 21:00:51,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2011309736, now seen corresponding path program 4 times [2024-06-27 21:00:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89382478] [2024-06-27 21:00:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:54,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:54,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89382478] [2024-06-27 21:00:54,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89382478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:54,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:54,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:54,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231361750] [2024-06-27 21:00:54,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:54,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:54,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:54,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:54,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 1487 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) [2024-06-27 21:00:54,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:54,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:54,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:55,482 INFO L124 PetriNetUnfolderBase]: 2136/3224 cut-off events. [2024-06-27 21:00:55,483 INFO L125 PetriNetUnfolderBase]: For 30867/31158 co-relation queries the response was YES. [2024-06-27 21:00:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17281 conditions, 3224 events. 2136/3224 cut-off events. For 30867/31158 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15617 event pairs, 558 based on Foata normal form. 62/3221 useless extension candidates. Maximal degree in co-relation 17233. Up to 2550 conditions per place. [2024-06-27 21:00:55,501 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 109 selfloop transitions, 90 changer transitions 0/209 dead transitions. [2024-06-27 21:00:55,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 209 transitions, 2326 flow [2024-06-27 21:00:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:00:55,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:00:55,503 INFO L175 Difference]: Start difference. First operand has 100 places, 144 transitions, 1487 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:00:55,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 209 transitions, 2326 flow [2024-06-27 21:00:55,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 209 transitions, 2202 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:55,534 INFO L231 Difference]: Finished difference. Result has 108 places, 165 transitions, 1838 flow [2024-06-27 21:00:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1838, PETRI_PLACES=108, PETRI_TRANSITIONS=165} [2024-06-27 21:00:55,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 21:00:55,535 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 165 transitions, 1838 flow [2024-06-27 21:00:55,535 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) [2024-06-27 21:00:55,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:55,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:00:55,535 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)] === [2024-06-27 21:00:55,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -240459760, now seen corresponding path program 2 times [2024-06-27 21:00:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:55,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519854331] [2024-06-27 21:00:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519854331] [2024-06-27 21:00:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519854331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:57,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:57,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025572356] [2024-06-27 21:00:57,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:57,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:57,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:57,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:00:57,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 1838 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:57,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:57,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:00:57,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:59,072 INFO L124 PetriNetUnfolderBase]: 2345/3499 cut-off events. [2024-06-27 21:00:59,072 INFO L125 PetriNetUnfolderBase]: For 37864/37890 co-relation queries the response was YES. [2024-06-27 21:00:59,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20471 conditions, 3499 events. 2345/3499 cut-off events. For 37864/37890 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16390 event pairs, 698 based on Foata normal form. 30/3528 useless extension candidates. Maximal degree in co-relation 20420. Up to 3296 conditions per place. [2024-06-27 21:00:59,096 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-27 21:00:59,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 202 transitions, 2434 flow [2024-06-27 21:00:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:00:59,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:00:59,098 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 1838 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:00:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 202 transitions, 2434 flow [2024-06-27 21:00:59,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 202 transitions, 2295 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:59,139 INFO L231 Difference]: Finished difference. Result has 112 places, 171 transitions, 1831 flow [2024-06-27 21:00:59,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1831, PETRI_PLACES=112, PETRI_TRANSITIONS=171} [2024-06-27 21:00:59,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 21:00:59,140 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 171 transitions, 1831 flow [2024-06-27 21:00:59,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:59,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:59,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:00:59,141 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)] === [2024-06-27 21:00:59,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash -240222610, now seen corresponding path program 3 times [2024-06-27 21:00:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:59,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165149353] [2024-06-27 21:00:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:01,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:01,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165149353] [2024-06-27 21:01:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165149353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:01,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:01,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:01,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761681413] [2024-06-27 21:01:01,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:01,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:01,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:01,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:01,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 171 transitions, 1831 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:01,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:01,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:01,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:02,484 INFO L124 PetriNetUnfolderBase]: 2335/3484 cut-off events. [2024-06-27 21:01:02,484 INFO L125 PetriNetUnfolderBase]: For 39898/39924 co-relation queries the response was YES. [2024-06-27 21:01:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20492 conditions, 3484 events. 2335/3484 cut-off events. For 39898/39924 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16269 event pairs, 697 based on Foata normal form. 30/3513 useless extension candidates. Maximal degree in co-relation 20438. Up to 3288 conditions per place. [2024-06-27 21:01:02,504 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 163 selfloop transitions, 35 changer transitions 0/201 dead transitions. [2024-06-27 21:01:02,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 201 transitions, 2362 flow [2024-06-27 21:01:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:01:02,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-27 21:01:02,506 INFO L175 Difference]: Start difference. First operand has 112 places, 171 transitions, 1831 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:01:02,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 201 transitions, 2362 flow [2024-06-27 21:01:02,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 201 transitions, 2313 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:02,546 INFO L231 Difference]: Finished difference. Result has 118 places, 174 transitions, 1901 flow [2024-06-27 21:01:02,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1901, PETRI_PLACES=118, PETRI_TRANSITIONS=174} [2024-06-27 21:01:02,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:01:02,547 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 174 transitions, 1901 flow [2024-06-27 21:01:02,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:02,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:02,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:02,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:01:02,549 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)] === [2024-06-27 21:01:02,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash -240213682, now seen corresponding path program 1 times [2024-06-27 21:01:02,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:02,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286735827] [2024-06-27 21:01:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:04,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:04,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286735827] [2024-06-27 21:01:04,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286735827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:04,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:04,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755939493] [2024-06-27 21:01:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:05,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:05,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 174 transitions, 1901 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:05,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:05,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:05,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:06,291 INFO L124 PetriNetUnfolderBase]: 2327/3475 cut-off events. [2024-06-27 21:01:06,292 INFO L125 PetriNetUnfolderBase]: For 43676/43676 co-relation queries the response was YES. [2024-06-27 21:01:06,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20674 conditions, 3475 events. 2327/3475 cut-off events. For 43676/43676 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16253 event pairs, 715 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 20617. Up to 3398 conditions per place. [2024-06-27 21:01:06,324 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2024-06-27 21:01:06,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 201 transitions, 2383 flow [2024-06-27 21:01:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:01:06,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 21:01:06,326 INFO L175 Difference]: Start difference. First operand has 118 places, 174 transitions, 1901 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:01:06,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 201 transitions, 2383 flow [2024-06-27 21:01:06,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 2333 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:06,376 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 1904 flow [2024-06-27 21:01:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1904, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2024-06-27 21:01:06,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 21:01:06,377 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 1904 flow [2024-06-27 21:01:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:06,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:06,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:01:06,378 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)] === [2024-06-27 21:01:06,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1627382062, now seen corresponding path program 1 times [2024-06-27 21:01:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:06,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884018542] [2024-06-27 21:01:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:08,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884018542] [2024-06-27 21:01:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884018542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:08,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305651606] [2024-06-27 21:01:08,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:08,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:08,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 1904 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) [2024-06-27 21:01:08,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:08,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:10,048 INFO L124 PetriNetUnfolderBase]: 2249/3383 cut-off events. [2024-06-27 21:01:10,049 INFO L125 PetriNetUnfolderBase]: For 52207/52348 co-relation queries the response was YES. [2024-06-27 21:01:10,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 3383 events. 2249/3383 cut-off events. For 52207/52348 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16330 event pairs, 638 based on Foata normal form. 66/3382 useless extension candidates. Maximal degree in co-relation 20914. Up to 2862 conditions per place. [2024-06-27 21:01:10,071 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 100 changer transitions 0/236 dead transitions. [2024-06-27 21:01:10,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 236 transitions, 2805 flow [2024-06-27 21:01:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:01:10,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:01:10,073 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 1904 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:01:10,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 236 transitions, 2805 flow [2024-06-27 21:01:10,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 236 transitions, 2770 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:10,123 INFO L231 Difference]: Finished difference. Result has 126 places, 189 transitions, 2328 flow [2024-06-27 21:01:10,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2328, PETRI_PLACES=126, PETRI_TRANSITIONS=189} [2024-06-27 21:01:10,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 21:01:10,124 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 189 transitions, 2328 flow [2024-06-27 21:01:10,124 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) [2024-06-27 21:01:10,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:10,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:10,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:01:10,124 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)] === [2024-06-27 21:01:10,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1627291697, now seen corresponding path program 1 times [2024-06-27 21:01:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:10,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716648968] [2024-06-27 21:01:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:10,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:12,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716648968] [2024-06-27 21:01:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716648968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:12,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966948461] [2024-06-27 21:01:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:12,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:12,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:12,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 189 transitions, 2328 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:12,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:12,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:12,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:13,398 INFO L124 PetriNetUnfolderBase]: 2451/3646 cut-off events. [2024-06-27 21:01:13,398 INFO L125 PetriNetUnfolderBase]: For 57016/57032 co-relation queries the response was YES. [2024-06-27 21:01:13,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23595 conditions, 3646 events. 2451/3646 cut-off events. For 57016/57032 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17129 event pairs, 708 based on Foata normal form. 20/3665 useless extension candidates. Maximal degree in co-relation 23534. Up to 3519 conditions per place. [2024-06-27 21:01:13,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 23 changer transitions 0/239 dead transitions. [2024-06-27 21:01:13,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 239 transitions, 3039 flow [2024-06-27 21:01:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:01:13,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:01:13,426 INFO L175 Difference]: Start difference. First operand has 126 places, 189 transitions, 2328 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:01:13,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 239 transitions, 3039 flow [2024-06-27 21:01:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 239 transitions, 2909 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:13,499 INFO L231 Difference]: Finished difference. Result has 133 places, 202 transitions, 2420 flow [2024-06-27 21:01:13,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2420, PETRI_PLACES=133, PETRI_TRANSITIONS=202} [2024-06-27 21:01:13,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 21:01:13,499 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 202 transitions, 2420 flow [2024-06-27 21:01:13,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:13,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:13,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:13,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:01:13,500 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)] === [2024-06-27 21:01:13,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1627291852, now seen corresponding path program 2 times [2024-06-27 21:01:13,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:13,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622589502] [2024-06-27 21:01:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622589502] [2024-06-27 21:01:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622589502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:15,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244678170] [2024-06-27 21:01:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:15,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:15,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 202 transitions, 2420 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) [2024-06-27 21:01:15,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:15,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:15,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:17,111 INFO L124 PetriNetUnfolderBase]: 2343/3515 cut-off events. [2024-06-27 21:01:17,111 INFO L125 PetriNetUnfolderBase]: For 67850/68063 co-relation queries the response was YES. [2024-06-27 21:01:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23963 conditions, 3515 events. 2343/3515 cut-off events. For 67850/68063 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16918 event pairs, 631 based on Foata normal form. 32/3479 useless extension candidates. Maximal degree in co-relation 23898. Up to 3252 conditions per place. [2024-06-27 21:01:17,139 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-27 21:01:17,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 246 transitions, 3112 flow [2024-06-27 21:01:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:01:17,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:01:17,142 INFO L175 Difference]: Start difference. First operand has 133 places, 202 transitions, 2420 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:01:17,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 246 transitions, 3112 flow [2024-06-27 21:01:17,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 246 transitions, 3067 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:17,214 INFO L231 Difference]: Finished difference. Result has 138 places, 206 transitions, 2551 flow [2024-06-27 21:01:17,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=138, PETRI_TRANSITIONS=206} [2024-06-27 21:01:17,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 21:01:17,215 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 206 transitions, 2551 flow [2024-06-27 21:01:17,215 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) [2024-06-27 21:01:17,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:17,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:01:17,216 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:17,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -827157229, now seen corresponding path program 2 times [2024-06-27 21:01:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:17,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113421487] [2024-06-27 21:01:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:18,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113421487] [2024-06-27 21:01:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113421487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891488574] [2024-06-27 21:01:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:18,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:18,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:18,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 206 transitions, 2551 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:18,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:18,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:18,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:20,333 INFO L124 PetriNetUnfolderBase]: 2496/3715 cut-off events. [2024-06-27 21:01:20,333 INFO L125 PetriNetUnfolderBase]: For 67630/67654 co-relation queries the response was YES. [2024-06-27 21:01:20,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25339 conditions, 3715 events. 2496/3715 cut-off events. For 67630/67654 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17463 event pairs, 675 based on Foata normal form. 30/3744 useless extension candidates. Maximal degree in co-relation 25272. Up to 3485 conditions per place. [2024-06-27 21:01:20,359 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 36 changer transitions 0/247 dead transitions. [2024-06-27 21:01:20,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 247 transitions, 3199 flow [2024-06-27 21:01:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:01:20,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:01:20,361 INFO L175 Difference]: Start difference. First operand has 138 places, 206 transitions, 2551 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:01:20,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 247 transitions, 3199 flow [2024-06-27 21:01:20,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 247 transitions, 3065 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:20,436 INFO L231 Difference]: Finished difference. Result has 140 places, 211 transitions, 2561 flow [2024-06-27 21:01:20,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2561, PETRI_PLACES=140, PETRI_TRANSITIONS=211} [2024-06-27 21:01:20,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 21:01:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 211 transitions, 2561 flow [2024-06-27 21:01:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:20,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:20,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:20,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:01:20,438 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)] === [2024-06-27 21:01:20,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash -827162809, now seen corresponding path program 3 times [2024-06-27 21:01:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854610480] [2024-06-27 21:01:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:22,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:22,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854610480] [2024-06-27 21:01:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854610480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:22,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264900175] [2024-06-27 21:01:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:22,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:22,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:22,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 211 transitions, 2561 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:22,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:23,867 INFO L124 PetriNetUnfolderBase]: 2504/3727 cut-off events. [2024-06-27 21:01:23,868 INFO L125 PetriNetUnfolderBase]: For 72457/72481 co-relation queries the response was YES. [2024-06-27 21:01:23,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26026 conditions, 3727 events. 2504/3727 cut-off events. For 72457/72481 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17526 event pairs, 673 based on Foata normal form. 28/3754 useless extension candidates. Maximal degree in co-relation 25958. Up to 3447 conditions per place. [2024-06-27 21:01:23,896 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 211 selfloop transitions, 42 changer transitions 0/256 dead transitions. [2024-06-27 21:01:23,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 256 transitions, 3285 flow [2024-06-27 21:01:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:01:23,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:01:23,898 INFO L175 Difference]: Start difference. First operand has 140 places, 211 transitions, 2561 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:01:23,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 256 transitions, 3285 flow [2024-06-27 21:01:23,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 256 transitions, 3187 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:23,979 INFO L231 Difference]: Finished difference. Result has 143 places, 219 transitions, 2689 flow [2024-06-27 21:01:23,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2689, PETRI_PLACES=143, PETRI_TRANSITIONS=219} [2024-06-27 21:01:23,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 21:01:23,980 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 219 transitions, 2689 flow [2024-06-27 21:01:23,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:23,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:23,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:23,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:01:23,980 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)] === [2024-06-27 21:01:23,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1623572782, now seen corresponding path program 3 times [2024-06-27 21:01:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:23,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045704004] [2024-06-27 21:01:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:23,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045704004] [2024-06-27 21:01:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045704004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:26,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306074584] [2024-06-27 21:01:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:26,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:26,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:26,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 219 transitions, 2689 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) [2024-06-27 21:01:26,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:26,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:27,524 INFO L124 PetriNetUnfolderBase]: 2504/3741 cut-off events. [2024-06-27 21:01:27,525 INFO L125 PetriNetUnfolderBase]: For 91178/91432 co-relation queries the response was YES. [2024-06-27 21:01:27,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27641 conditions, 3741 events. 2504/3741 cut-off events. For 91178/91432 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18033 event pairs, 630 based on Foata normal form. 34/3694 useless extension candidates. Maximal degree in co-relation 27571. Up to 3419 conditions per place. [2024-06-27 21:01:27,553 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/271 dead transitions. [2024-06-27 21:01:27,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 271 transitions, 3682 flow [2024-06-27 21:01:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:01:27,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:01:27,554 INFO L175 Difference]: Start difference. First operand has 143 places, 219 transitions, 2689 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:01:27,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 271 transitions, 3682 flow [2024-06-27 21:01:27,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 271 transitions, 3610 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:27,651 INFO L231 Difference]: Finished difference. Result has 152 places, 239 transitions, 3232 flow [2024-06-27 21:01:27,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2623, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3232, PETRI_PLACES=152, PETRI_TRANSITIONS=239} [2024-06-27 21:01:27,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 21:01:27,651 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 239 transitions, 3232 flow [2024-06-27 21:01:27,651 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) [2024-06-27 21:01:27,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:27,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:27,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:01:27,652 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)] === [2024-06-27 21:01:27,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash 409979948, now seen corresponding path program 4 times [2024-06-27 21:01:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829165511] [2024-06-27 21:01:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:29,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829165511] [2024-06-27 21:01:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829165511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:29,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937731996] [2024-06-27 21:01:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:29,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:29,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:29,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 239 transitions, 3232 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) [2024-06-27 21:01:29,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:29,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:29,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:31,043 INFO L124 PetriNetUnfolderBase]: 2497/3739 cut-off events. [2024-06-27 21:01:31,043 INFO L125 PetriNetUnfolderBase]: For 95598/95773 co-relation queries the response was YES. [2024-06-27 21:01:31,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28222 conditions, 3739 events. 2497/3739 cut-off events. For 95598/95773 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18143 event pairs, 632 based on Foata normal form. 57/3724 useless extension candidates. Maximal degree in co-relation 28146. Up to 3363 conditions per place. [2024-06-27 21:01:31,072 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 76 changer transitions 0/276 dead transitions. [2024-06-27 21:01:31,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 276 transitions, 3998 flow [2024-06-27 21:01:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:01:31,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:01:31,073 INFO L175 Difference]: Start difference. First operand has 152 places, 239 transitions, 3232 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:01:31,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 276 transitions, 3998 flow [2024-06-27 21:01:31,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 276 transitions, 3893 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:31,176 INFO L231 Difference]: Finished difference. Result has 156 places, 243 transitions, 3352 flow [2024-06-27 21:01:31,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3352, PETRI_PLACES=156, PETRI_TRANSITIONS=243} [2024-06-27 21:01:31,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 21:01:31,176 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 243 transitions, 3352 flow [2024-06-27 21:01:31,176 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) [2024-06-27 21:01:31,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:31,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:31,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:01:31,177 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)] === [2024-06-27 21:01:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1143035527, now seen corresponding path program 4 times [2024-06-27 21:01:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146572352] [2024-06-27 21:01:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:33,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:33,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146572352] [2024-06-27 21:01:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146572352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614373642] [2024-06-27 21:01:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:33,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:33,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 243 transitions, 3352 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:33,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:33,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:33,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:34,790 INFO L124 PetriNetUnfolderBase]: 2863/4240 cut-off events. [2024-06-27 21:01:34,791 INFO L125 PetriNetUnfolderBase]: For 101286/101326 co-relation queries the response was YES. [2024-06-27 21:01:34,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31743 conditions, 4240 events. 2863/4240 cut-off events. For 101286/101326 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20278 event pairs, 591 based on Foata normal form. 44/4283 useless extension candidates. Maximal degree in co-relation 31666. Up to 3487 conditions per place. [2024-06-27 21:01:34,824 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 233 selfloop transitions, 118 changer transitions 0/354 dead transitions. [2024-06-27 21:01:34,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 354 transitions, 5162 flow [2024-06-27 21:01:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:01:34,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:01:34,825 INFO L175 Difference]: Start difference. First operand has 156 places, 243 transitions, 3352 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:01:34,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 354 transitions, 5162 flow [2024-06-27 21:01:34,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 354 transitions, 4979 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:34,967 INFO L231 Difference]: Finished difference. Result has 164 places, 300 transitions, 4340 flow [2024-06-27 21:01:34,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4340, PETRI_PLACES=164, PETRI_TRANSITIONS=300} [2024-06-27 21:01:34,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 21:01:34,968 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 300 transitions, 4340 flow [2024-06-27 21:01:34,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:34,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:34,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:01:34,969 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)] === [2024-06-27 21:01:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -427462803, now seen corresponding path program 5 times [2024-06-27 21:01:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294400931] [2024-06-27 21:01:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294400931] [2024-06-27 21:01:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294400931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:36,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:36,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741982358] [2024-06-27 21:01:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:36,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:36,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:36,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:36,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 300 transitions, 4340 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:36,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:36,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:36,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:38,411 INFO L124 PetriNetUnfolderBase]: 2889/4278 cut-off events. [2024-06-27 21:01:38,412 INFO L125 PetriNetUnfolderBase]: For 113320/113366 co-relation queries the response was YES. [2024-06-27 21:01:38,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34338 conditions, 4278 events. 2889/4278 cut-off events. For 113320/113366 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20455 event pairs, 684 based on Foata normal form. 50/4327 useless extension candidates. Maximal degree in co-relation 34256. Up to 3954 conditions per place. [2024-06-27 21:01:38,449 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 59 changer transitions 0/351 dead transitions. [2024-06-27 21:01:38,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 351 transitions, 5494 flow [2024-06-27 21:01:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:01:38,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:01:38,451 INFO L175 Difference]: Start difference. First operand has 164 places, 300 transitions, 4340 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:01:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 351 transitions, 5494 flow [2024-06-27 21:01:38,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 351 transitions, 5379 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:38,622 INFO L231 Difference]: Finished difference. Result has 170 places, 315 transitions, 4636 flow [2024-06-27 21:01:38,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4636, PETRI_PLACES=170, PETRI_TRANSITIONS=315} [2024-06-27 21:01:38,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 21:01:38,622 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 315 transitions, 4636 flow [2024-06-27 21:01:38,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:38,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:38,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:38,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:01:38,623 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)] === [2024-06-27 21:01:38,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1135683877, now seen corresponding path program 6 times [2024-06-27 21:01:38,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:38,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786856866] [2024-06-27 21:01:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:38,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786856866] [2024-06-27 21:01:40,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786856866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:40,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:40,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:40,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319680046] [2024-06-27 21:01:40,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:40,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:40,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:40,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:40,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 315 transitions, 4636 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:40,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:40,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:40,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:42,127 INFO L124 PetriNetUnfolderBase]: 2879/4265 cut-off events. [2024-06-27 21:01:42,127 INFO L125 PetriNetUnfolderBase]: For 121752/121798 co-relation queries the response was YES. [2024-06-27 21:01:42,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35002 conditions, 4265 events. 2879/4265 cut-off events. For 121752/121798 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20402 event pairs, 683 based on Foata normal form. 50/4314 useless extension candidates. Maximal degree in co-relation 34917. Up to 4081 conditions per place. [2024-06-27 21:01:42,166 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 306 selfloop transitions, 40 changer transitions 0/349 dead transitions. [2024-06-27 21:01:42,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 349 transitions, 5466 flow [2024-06-27 21:01:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:01:42,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-27 21:01:42,167 INFO L175 Difference]: Start difference. First operand has 170 places, 315 transitions, 4636 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:01:42,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 349 transitions, 5466 flow [2024-06-27 21:01:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 349 transitions, 5351 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:42,353 INFO L231 Difference]: Finished difference. Result has 175 places, 318 transitions, 4657 flow [2024-06-27 21:01:42,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4657, PETRI_PLACES=175, PETRI_TRANSITIONS=318} [2024-06-27 21:01:42,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 21:01:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 318 transitions, 4657 flow [2024-06-27 21:01:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-27 21:01:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:42,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:42,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:01:42,354 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)] === [2024-06-27 21:01:42,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:42,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1446077600, now seen corresponding path program 5 times [2024-06-27 21:01:42,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:42,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871015737] [2024-06-27 21:01:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:44,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871015737] [2024-06-27 21:01:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871015737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:44,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356517013] [2024-06-27 21:01:44,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:44,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:44,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 318 transitions, 4657 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) [2024-06-27 21:01:44,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:44,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:44,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:46,441 INFO L124 PetriNetUnfolderBase]: 2856/4257 cut-off events. [2024-06-27 21:01:46,441 INFO L125 PetriNetUnfolderBase]: For 136906/137006 co-relation queries the response was YES. [2024-06-27 21:01:46,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 4257 events. 2856/4257 cut-off events. For 136906/137006 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20789 event pairs, 603 based on Foata normal form. 31/4227 useless extension candidates. Maximal degree in co-relation 35873. Up to 3862 conditions per place. [2024-06-27 21:01:46,484 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 263 selfloop transitions, 97 changer transitions 0/393 dead transitions. [2024-06-27 21:01:46,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 393 transitions, 6120 flow [2024-06-27 21:01:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:01:46,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 21:01:46,486 INFO L175 Difference]: Start difference. First operand has 175 places, 318 transitions, 4657 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:01:46,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 393 transitions, 6120 flow [2024-06-27 21:01:46,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 393 transitions, 6022 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:46,709 INFO L231 Difference]: Finished difference. Result has 183 places, 349 transitions, 5400 flow [2024-06-27 21:01:46,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4561, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5400, PETRI_PLACES=183, PETRI_TRANSITIONS=349} [2024-06-27 21:01:46,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 21:01:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 349 transitions, 5400 flow [2024-06-27 21:01:46,710 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) [2024-06-27 21:01:46,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:46,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:01:46,710 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)] === [2024-06-27 21:01:46,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash 9605669, now seen corresponding path program 1 times [2024-06-27 21:01:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90059525] [2024-06-27 21:01:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90059525] [2024-06-27 21:01:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90059525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:49,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201806692] [2024-06-27 21:01:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:49,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:49,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 349 transitions, 5400 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) [2024-06-27 21:01:49,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:49,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:49,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:51,331 INFO L124 PetriNetUnfolderBase]: 3039/4538 cut-off events. [2024-06-27 21:01:51,332 INFO L125 PetriNetUnfolderBase]: For 162381/162481 co-relation queries the response was YES. [2024-06-27 21:01:51,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39163 conditions, 4538 events. 3039/4538 cut-off events. For 162381/162481 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22572 event pairs, 466 based on Foata normal form. 51/4522 useless extension candidates. Maximal degree in co-relation 39072. Up to 3428 conditions per place. [2024-06-27 21:01:51,377 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 226 selfloop transitions, 164 changer transitions 0/423 dead transitions. [2024-06-27 21:01:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 423 transitions, 6807 flow [2024-06-27 21:01:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 21:01:51,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 21:01:51,378 INFO L175 Difference]: Start difference. First operand has 183 places, 349 transitions, 5400 flow. Second operand 9 states and 183 transitions. [2024-06-27 21:01:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 423 transitions, 6807 flow [2024-06-27 21:01:51,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 423 transitions, 6569 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:51,653 INFO L231 Difference]: Finished difference. Result has 188 places, 361 transitions, 5772 flow [2024-06-27 21:01:51,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5772, PETRI_PLACES=188, PETRI_TRANSITIONS=361} [2024-06-27 21:01:51,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-27 21:01:51,654 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 361 transitions, 5772 flow [2024-06-27 21:01:51,654 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) [2024-06-27 21:01:51,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:51,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:51,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:01:51,655 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)] === [2024-06-27 21:01:51,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1090765537, now seen corresponding path program 2 times [2024-06-27 21:01:51,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:51,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680362489] [2024-06-27 21:01:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:51,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:53,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680362489] [2024-06-27 21:01:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680362489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:53,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:53,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:53,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288633820] [2024-06-27 21:01:53,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:53,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:53,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:53,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:53,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:01:53,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 361 transitions, 5772 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) [2024-06-27 21:01:53,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:53,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:01:53,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:55,752 INFO L124 PetriNetUnfolderBase]: 3146/4711 cut-off events. [2024-06-27 21:01:55,752 INFO L125 PetriNetUnfolderBase]: For 181502/181605 co-relation queries the response was YES. [2024-06-27 21:01:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41705 conditions, 4711 events. 3146/4711 cut-off events. For 181502/181605 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23790 event pairs, 640 based on Foata normal form. 66/4709 useless extension candidates. Maximal degree in co-relation 41611. Up to 3893 conditions per place. [2024-06-27 21:01:55,800 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 211 selfloop transitions, 176 changer transitions 0/420 dead transitions. [2024-06-27 21:01:55,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 420 transitions, 7011 flow [2024-06-27 21:01:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:01:55,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 21:01:55,801 INFO L175 Difference]: Start difference. First operand has 188 places, 361 transitions, 5772 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:01:55,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 420 transitions, 7011 flow [2024-06-27 21:01:56,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 420 transitions, 6833 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:56,088 INFO L231 Difference]: Finished difference. Result has 193 places, 364 transitions, 6033 flow [2024-06-27 21:01:56,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6033, PETRI_PLACES=193, PETRI_TRANSITIONS=364} [2024-06-27 21:01:56,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 21:01:56,089 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 364 transitions, 6033 flow [2024-06-27 21:01:56,089 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) [2024-06-27 21:01:56,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:56,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:01:56,089 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)] === [2024-06-27 21:01:56,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 9666243, now seen corresponding path program 1 times [2024-06-27 21:01:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644448619] [2024-06-27 21:01:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644448619] [2024-06-27 21:01:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644448619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:58,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:58,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836274438] [2024-06-27 21:01:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:01:58,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 364 transitions, 6033 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:58,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:58,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:01:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:00,279 INFO L124 PetriNetUnfolderBase]: 3327/4949 cut-off events. [2024-06-27 21:02:00,280 INFO L125 PetriNetUnfolderBase]: For 178820/178850 co-relation queries the response was YES. [2024-06-27 21:02:00,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43832 conditions, 4949 events. 3327/4949 cut-off events. For 178820/178850 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24666 event pairs, 732 based on Foata normal form. 34/4982 useless extension candidates. Maximal degree in co-relation 43736. Up to 4234 conditions per place. [2024-06-27 21:02:00,332 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 96 changer transitions 0/438 dead transitions. [2024-06-27 21:02:00,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 438 transitions, 7591 flow [2024-06-27 21:02:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:02:00,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:02:00,335 INFO L175 Difference]: Start difference. First operand has 193 places, 364 transitions, 6033 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:02:00,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 438 transitions, 7591 flow [2024-06-27 21:02:00,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 438 transitions, 7209 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:00,634 INFO L231 Difference]: Finished difference. Result has 197 places, 379 transitions, 6121 flow [2024-06-27 21:02:00,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6121, PETRI_PLACES=197, PETRI_TRANSITIONS=379} [2024-06-27 21:02:00,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 21:02:00,635 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 379 transitions, 6121 flow [2024-06-27 21:02:00,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:00,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:00,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:00,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:02:00,635 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)] === [2024-06-27 21:02:00,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 658647593, now seen corresponding path program 3 times [2024-06-27 21:02:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:00,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39762978] [2024-06-27 21:02:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:03,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39762978] [2024-06-27 21:02:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39762978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:03,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:03,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911343747] [2024-06-27 21:02:03,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:02:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 379 transitions, 6121 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) [2024-06-27 21:02:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:02:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:05,474 INFO L124 PetriNetUnfolderBase]: 3298/4936 cut-off events. [2024-06-27 21:02:05,474 INFO L125 PetriNetUnfolderBase]: For 203185/203324 co-relation queries the response was YES. [2024-06-27 21:02:05,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44805 conditions, 4936 events. 3298/4936 cut-off events. For 203185/203324 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25066 event pairs, 655 based on Foata normal form. 61/4931 useless extension candidates. Maximal degree in co-relation 44706. Up to 4507 conditions per place. [2024-06-27 21:02:05,520 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 331 selfloop transitions, 64 changer transitions 0/431 dead transitions. [2024-06-27 21:02:05,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 431 transitions, 7236 flow [2024-06-27 21:02:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:02:05,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:02:05,521 INFO L175 Difference]: Start difference. First operand has 197 places, 379 transitions, 6121 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:02:05,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 431 transitions, 7236 flow [2024-06-27 21:02:05,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 431 transitions, 7075 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:05,806 INFO L231 Difference]: Finished difference. Result has 202 places, 381 transitions, 6156 flow [2024-06-27 21:02:05,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6156, PETRI_PLACES=202, PETRI_TRANSITIONS=381} [2024-06-27 21:02:05,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 21:02:05,807 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 381 transitions, 6156 flow [2024-06-27 21:02:05,807 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) [2024-06-27 21:02:05,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:05,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:05,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:02:05,808 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)] === [2024-06-27 21:02:05,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1093562171, now seen corresponding path program 2 times [2024-06-27 21:02:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897978509] [2024-06-27 21:02:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897978509] [2024-06-27 21:02:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897978509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:08,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:08,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515676589] [2024-06-27 21:02:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:08,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:08,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:08,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 381 transitions, 6156 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:08,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:08,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:08,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:10,527 INFO L124 PetriNetUnfolderBase]: 3394/5057 cut-off events. [2024-06-27 21:02:10,528 INFO L125 PetriNetUnfolderBase]: For 197488/197516 co-relation queries the response was YES. [2024-06-27 21:02:10,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45423 conditions, 5057 events. 3394/5057 cut-off events. For 197488/197516 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25421 event pairs, 715 based on Foata normal form. 32/5088 useless extension candidates. Maximal degree in co-relation 45322. Up to 4554 conditions per place. [2024-06-27 21:02:10,581 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 355 selfloop transitions, 84 changer transitions 0/442 dead transitions. [2024-06-27 21:02:10,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 442 transitions, 7346 flow [2024-06-27 21:02:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:02:10,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:02:10,582 INFO L175 Difference]: Start difference. First operand has 202 places, 381 transitions, 6156 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:02:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 442 transitions, 7346 flow [2024-06-27 21:02:10,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 442 transitions, 7203 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:10,961 INFO L231 Difference]: Finished difference. Result has 207 places, 391 transitions, 6397 flow [2024-06-27 21:02:10,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6397, PETRI_PLACES=207, PETRI_TRANSITIONS=391} [2024-06-27 21:02:10,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 21:02:10,962 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 391 transitions, 6397 flow [2024-06-27 21:02:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:10,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:10,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:10,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:02:10,962 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)] === [2024-06-27 21:02:10,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1209030971, now seen corresponding path program 3 times [2024-06-27 21:02:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097466749] [2024-06-27 21:02:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:10,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:13,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097466749] [2024-06-27 21:02:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097466749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229820743] [2024-06-27 21:02:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:13,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:13,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 391 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:13,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:13,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:13,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:15,255 INFO L124 PetriNetUnfolderBase]: 3420/5095 cut-off events. [2024-06-27 21:02:15,256 INFO L125 PetriNetUnfolderBase]: For 208010/208038 co-relation queries the response was YES. [2024-06-27 21:02:15,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46532 conditions, 5095 events. 3420/5095 cut-off events. For 208010/208038 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25599 event pairs, 737 based on Foata normal form. 32/5126 useless extension candidates. Maximal degree in co-relation 46428. Up to 4807 conditions per place. [2024-06-27 21:02:15,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 58 changer transitions 0/433 dead transitions. [2024-06-27 21:02:15,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 433 transitions, 7419 flow [2024-06-27 21:02:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:02:15,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:02:15,316 INFO L175 Difference]: Start difference. First operand has 207 places, 391 transitions, 6397 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:02:15,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 433 transitions, 7419 flow [2024-06-27 21:02:15,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 433 transitions, 7349 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:15,687 INFO L231 Difference]: Finished difference. Result has 213 places, 394 transitions, 6498 flow [2024-06-27 21:02:15,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6498, PETRI_PLACES=213, PETRI_TRANSITIONS=394} [2024-06-27 21:02:15,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 21:02:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 394 transitions, 6498 flow [2024-06-27 21:02:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:15,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:15,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:02:15,688 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)] === [2024-06-27 21:02:15,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 127938497, now seen corresponding path program 1 times [2024-06-27 21:02:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728719961] [2024-06-27 21:02:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728719961] [2024-06-27 21:02:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728719961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:18,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658156279] [2024-06-27 21:02:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:18,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:18,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 394 transitions, 6498 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:18,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:18,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:18,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:20,631 INFO L124 PetriNetUnfolderBase]: 3440/5127 cut-off events. [2024-06-27 21:02:20,632 INFO L125 PetriNetUnfolderBase]: For 218674/218702 co-relation queries the response was YES. [2024-06-27 21:02:20,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47161 conditions, 5127 events. 3440/5127 cut-off events. For 218674/218702 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25854 event pairs, 717 based on Foata normal form. 32/5158 useless extension candidates. Maximal degree in co-relation 47054. Up to 4884 conditions per place. [2024-06-27 21:02:20,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 49 changer transitions 0/429 dead transitions. [2024-06-27 21:02:20,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 429 transitions, 7479 flow [2024-06-27 21:02:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:02:20,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:02:20,680 INFO L175 Difference]: Start difference. First operand has 213 places, 394 transitions, 6498 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:02:20,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 429 transitions, 7479 flow [2024-06-27 21:02:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 429 transitions, 7351 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:21,066 INFO L231 Difference]: Finished difference. Result has 214 places, 396 transitions, 6513 flow [2024-06-27 21:02:21,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6513, PETRI_PLACES=214, PETRI_TRANSITIONS=396} [2024-06-27 21:02:21,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 21:02:21,067 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 396 transitions, 6513 flow [2024-06-27 21:02:21,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:21,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:21,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:02:21,067 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)] === [2024-06-27 21:02:21,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1037097479, now seen corresponding path program 4 times [2024-06-27 21:02:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107960538] [2024-06-27 21:02:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:23,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107960538] [2024-06-27 21:02:23,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107960538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:23,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:23,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138019042] [2024-06-27 21:02:23,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:23,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:23,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 396 transitions, 6513 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:23,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:23,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:25,580 INFO L124 PetriNetUnfolderBase]: 3621/5388 cut-off events. [2024-06-27 21:02:25,580 INFO L125 PetriNetUnfolderBase]: For 235282/235306 co-relation queries the response was YES. [2024-06-27 21:02:25,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49871 conditions, 5388 events. 3621/5388 cut-off events. For 235282/235306 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27259 event pairs, 713 based on Foata normal form. 28/5415 useless extension candidates. Maximal degree in co-relation 49763. Up to 4950 conditions per place. [2024-06-27 21:02:25,638 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 397 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-27 21:02:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 494 transitions, 8458 flow [2024-06-27 21:02:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:02:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:02:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-27 21:02:25,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791208791208791 [2024-06-27 21:02:25,639 INFO L175 Difference]: Start difference. First operand has 214 places, 396 transitions, 6513 flow. Second operand 13 states and 207 transitions. [2024-06-27 21:02:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 494 transitions, 8458 flow [2024-06-27 21:02:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 494 transitions, 8326 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:26,041 INFO L231 Difference]: Finished difference. Result has 224 places, 432 transitions, 7260 flow [2024-06-27 21:02:26,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7260, PETRI_PLACES=224, PETRI_TRANSITIONS=432} [2024-06-27 21:02:26,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 21:02:26,042 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 432 transitions, 7260 flow [2024-06-27 21:02:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:26,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:26,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:26,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:02:26,042 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)] === [2024-06-27 21:02:26,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash -310833781, now seen corresponding path program 4 times [2024-06-27 21:02:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:26,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157822797] [2024-06-27 21:02:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:28,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:28,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157822797] [2024-06-27 21:02:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157822797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373252117] [2024-06-27 21:02:28,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:28,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:28,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:02:28,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 432 transitions, 7260 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) [2024-06-27 21:02:28,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:28,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:02:28,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:30,958 INFO L124 PetriNetUnfolderBase]: 3677/5515 cut-off events. [2024-06-27 21:02:30,958 INFO L125 PetriNetUnfolderBase]: For 282991/283131 co-relation queries the response was YES. [2024-06-27 21:02:30,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53008 conditions, 5515 events. 3677/5515 cut-off events. For 282991/283131 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28715 event pairs, 651 based on Foata normal form. 61/5509 useless extension candidates. Maximal degree in co-relation 52896. Up to 4716 conditions per place. [2024-06-27 21:02:31,022 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 159 changer transitions 0/508 dead transitions. [2024-06-27 21:02:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 508 transitions, 9011 flow [2024-06-27 21:02:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:02:31,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:02:31,023 INFO L175 Difference]: Start difference. First operand has 224 places, 432 transitions, 7260 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:02:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 508 transitions, 9011 flow [2024-06-27 21:02:31,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 508 transitions, 8820 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:31,440 INFO L231 Difference]: Finished difference. Result has 232 places, 452 transitions, 7966 flow [2024-06-27 21:02:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7079, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7966, PETRI_PLACES=232, PETRI_TRANSITIONS=452} [2024-06-27 21:02:31,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-27 21:02:31,441 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 452 transitions, 7966 flow [2024-06-27 21:02:31,441 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) [2024-06-27 21:02:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:02:31,441 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)] === [2024-06-27 21:02:31,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1208853341, now seen corresponding path program 5 times [2024-06-27 21:02:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:31,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429134479] [2024-06-27 21:02:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:34,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429134479] [2024-06-27 21:02:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429134479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:34,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275306695] [2024-06-27 21:02:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:34,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:34,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 452 transitions, 7966 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:34,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:34,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:36,336 INFO L124 PetriNetUnfolderBase]: 3888/5800 cut-off events. [2024-06-27 21:02:36,337 INFO L125 PetriNetUnfolderBase]: For 296217/296243 co-relation queries the response was YES. [2024-06-27 21:02:36,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 5800 events. 3888/5800 cut-off events. For 296217/296243 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 29927 event pairs, 747 based on Foata normal form. 30/5829 useless extension candidates. Maximal degree in co-relation 56536. Up to 5270 conditions per place. [2024-06-27 21:02:36,411 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 428 selfloop transitions, 90 changer transitions 0/521 dead transitions. [2024-06-27 21:02:36,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 521 transitions, 9571 flow [2024-06-27 21:02:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:02:36,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-27 21:02:36,413 INFO L175 Difference]: Start difference. First operand has 232 places, 452 transitions, 7966 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:02:36,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 521 transitions, 9571 flow [2024-06-27 21:02:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 521 transitions, 9391 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:37,138 INFO L231 Difference]: Finished difference. Result has 241 places, 466 transitions, 8262 flow [2024-06-27 21:02:37,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8262, PETRI_PLACES=241, PETRI_TRANSITIONS=466} [2024-06-27 21:02:37,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 21:02:37,139 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 466 transitions, 8262 flow [2024-06-27 21:02:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:37,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:37,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:37,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:02:37,140 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)] === [2024-06-27 21:02:37,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash -802147753, now seen corresponding path program 2 times [2024-06-27 21:02:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823648553] [2024-06-27 21:02:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:40,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823648553] [2024-06-27 21:02:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823648553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:40,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:40,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:40,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829368381] [2024-06-27 21:02:40,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:40,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:40,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:40,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 466 transitions, 8262 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:40,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:40,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:40,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:42,246 INFO L124 PetriNetUnfolderBase]: 3908/5832 cut-off events. [2024-06-27 21:02:42,246 INFO L125 PetriNetUnfolderBase]: For 309017/309059 co-relation queries the response was YES. [2024-06-27 21:02:42,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57592 conditions, 5832 events. 3908/5832 cut-off events. For 309017/309059 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30112 event pairs, 749 based on Foata normal form. 46/5877 useless extension candidates. Maximal degree in co-relation 57472. Up to 5575 conditions per place. [2024-06-27 21:02:42,313 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 57 changer transitions 0/498 dead transitions. [2024-06-27 21:02:42,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 498 transitions, 9381 flow [2024-06-27 21:02:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:02:42,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:02:42,315 INFO L175 Difference]: Start difference. First operand has 241 places, 466 transitions, 8262 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:02:42,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 498 transitions, 9381 flow [2024-06-27 21:02:42,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 498 transitions, 9199 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:42,836 INFO L231 Difference]: Finished difference. Result has 243 places, 468 transitions, 8247 flow [2024-06-27 21:02:42,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8247, PETRI_PLACES=243, PETRI_TRANSITIONS=468} [2024-06-27 21:02:42,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 21:02:42,837 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 468 transitions, 8247 flow [2024-06-27 21:02:42,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:42,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:02:42,837 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)] === [2024-06-27 21:02:42,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1082942669, now seen corresponding path program 3 times [2024-06-27 21:02:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:42,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927017113] [2024-06-27 21:02:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:45,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:45,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927017113] [2024-06-27 21:02:45,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927017113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:45,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:45,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902805864] [2024-06-27 21:02:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:45,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:45,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:45,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 468 transitions, 8247 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:45,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:45,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:45,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:47,653 INFO L124 PetriNetUnfolderBase]: 3928/5864 cut-off events. [2024-06-27 21:02:47,653 INFO L125 PetriNetUnfolderBase]: For 318013/318055 co-relation queries the response was YES. [2024-06-27 21:02:47,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58092 conditions, 5864 events. 3928/5864 cut-off events. For 318013/318055 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30244 event pairs, 681 based on Foata normal form. 46/5909 useless extension candidates. Maximal degree in co-relation 57970. Up to 5501 conditions per place. [2024-06-27 21:02:47,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 65 changer transitions 0/505 dead transitions. [2024-06-27 21:02:47,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 505 transitions, 9590 flow [2024-06-27 21:02:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:02:47,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 21:02:47,729 INFO L175 Difference]: Start difference. First operand has 243 places, 468 transitions, 8247 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:02:47,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 505 transitions, 9590 flow [2024-06-27 21:02:48,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 505 transitions, 9447 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:48,358 INFO L231 Difference]: Finished difference. Result has 246 places, 472 transitions, 8337 flow [2024-06-27 21:02:48,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8104, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8337, PETRI_PLACES=246, PETRI_TRANSITIONS=472} [2024-06-27 21:02:48,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 21:02:48,358 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 472 transitions, 8337 flow [2024-06-27 21:02:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:02:48,359 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)] === [2024-06-27 21:02:48,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 846470639, now seen corresponding path program 4 times [2024-06-27 21:02:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722819946] [2024-06-27 21:02:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722819946] [2024-06-27 21:02:50,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722819946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:50,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:50,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:50,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669720163] [2024-06-27 21:02:50,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:50,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:50,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:50,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:50,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 472 transitions, 8337 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:50,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:50,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:53,305 INFO L124 PetriNetUnfolderBase]: 3920/5853 cut-off events. [2024-06-27 21:02:53,305 INFO L125 PetriNetUnfolderBase]: For 328293/328335 co-relation queries the response was YES. [2024-06-27 21:02:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58290 conditions, 5853 events. 3920/5853 cut-off events. For 328293/328335 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30231 event pairs, 749 based on Foata normal form. 46/5898 useless extension candidates. Maximal degree in co-relation 58167. Up to 5595 conditions per place. [2024-06-27 21:02:53,373 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 447 selfloop transitions, 53 changer transitions 0/503 dead transitions. [2024-06-27 21:02:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 503 transitions, 9431 flow [2024-06-27 21:02:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:02:53,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:02:53,375 INFO L175 Difference]: Start difference. First operand has 246 places, 472 transitions, 8337 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:02:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 503 transitions, 9431 flow [2024-06-27 21:02:53,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 503 transitions, 9300 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:53,937 INFO L231 Difference]: Finished difference. Result has 249 places, 472 transitions, 8319 flow [2024-06-27 21:02:53,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8206, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8319, PETRI_PLACES=249, PETRI_TRANSITIONS=472} [2024-06-27 21:02:53,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 21:02:53,938 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 472 transitions, 8319 flow [2024-06-27 21:02:53,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:53,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:53,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:02:53,939 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:53,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 846470391, now seen corresponding path program 1 times [2024-06-27 21:02:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:53,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345496617] [2024-06-27 21:02:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:53,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345496617] [2024-06-27 21:02:56,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345496617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:56,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:56,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:56,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802914768] [2024-06-27 21:02:56,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:56,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:56,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:56,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:56,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:02:56,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 472 transitions, 8319 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:56,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:56,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:02:56,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:58,614 INFO L124 PetriNetUnfolderBase]: 3933/5872 cut-off events. [2024-06-27 21:02:58,615 INFO L125 PetriNetUnfolderBase]: For 338537/338579 co-relation queries the response was YES. [2024-06-27 21:02:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5872 events. 3933/5872 cut-off events. For 338537/338579 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30336 event pairs, 748 based on Foata normal form. 44/5915 useless extension candidates. Maximal degree in co-relation 58678. Up to 5603 conditions per place. [2024-06-27 21:02:58,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 59 changer transitions 0/506 dead transitions. [2024-06-27 21:02:58,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 506 transitions, 9483 flow [2024-06-27 21:02:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:02:58,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:02:58,688 INFO L175 Difference]: Start difference. First operand has 249 places, 472 transitions, 8319 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:02:58,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 506 transitions, 9483 flow [2024-06-27 21:02:59,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 506 transitions, 9357 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:59,303 INFO L231 Difference]: Finished difference. Result has 250 places, 475 transitions, 8389 flow [2024-06-27 21:02:59,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8389, PETRI_PLACES=250, PETRI_TRANSITIONS=475} [2024-06-27 21:02:59,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 21:02:59,304 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 475 transitions, 8389 flow [2024-06-27 21:02:59,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:59,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:59,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:02:59,305 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)] === [2024-06-27 21:02:59,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -366443129, now seen corresponding path program 6 times [2024-06-27 21:02:59,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:59,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732107770] [2024-06-27 21:02:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732107770] [2024-06-27 21:03:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732107770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237183962] [2024-06-27 21:03:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:01,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:01,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:01,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:01,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 475 transitions, 8389 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:01,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:01,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:01,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:04,010 INFO L124 PetriNetUnfolderBase]: 3959/5909 cut-off events. [2024-06-27 21:03:04,010 INFO L125 PetriNetUnfolderBase]: For 352979/353021 co-relation queries the response was YES. [2024-06-27 21:03:04,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59438 conditions, 5909 events. 3959/5909 cut-off events. For 352979/353021 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30538 event pairs, 747 based on Foata normal form. 46/5954 useless extension candidates. Maximal degree in co-relation 59312. Up to 5534 conditions per place. [2024-06-27 21:03:04,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 77 changer transitions 0/519 dead transitions. [2024-06-27 21:03:04,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 519 transitions, 9791 flow [2024-06-27 21:03:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:03:04,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:03:04,085 INFO L175 Difference]: Start difference. First operand has 250 places, 475 transitions, 8389 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:03:04,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 519 transitions, 9791 flow [2024-06-27 21:03:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 519 transitions, 9665 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:04,744 INFO L231 Difference]: Finished difference. Result has 253 places, 478 transitions, 8489 flow [2024-06-27 21:03:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8489, PETRI_PLACES=253, PETRI_TRANSITIONS=478} [2024-06-27 21:03:04,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 21:03:04,745 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 478 transitions, 8489 flow [2024-06-27 21:03:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:04,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:04,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:04,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:03:04,745 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)] === [2024-06-27 21:03:04,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 846285941, now seen corresponding path program 5 times [2024-06-27 21:03:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019516717] [2024-06-27 21:03:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019516717] [2024-06-27 21:03:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019516717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:07,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:07,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463511780] [2024-06-27 21:03:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:07,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:03:07,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 478 transitions, 8489 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) [2024-06-27 21:03:07,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:07,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:03:07,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:09,302 INFO L124 PetriNetUnfolderBase]: 3935/5916 cut-off events. [2024-06-27 21:03:09,302 INFO L125 PetriNetUnfolderBase]: For 393064/393222 co-relation queries the response was YES. [2024-06-27 21:03:09,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60104 conditions, 5916 events. 3935/5916 cut-off events. For 393064/393222 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31130 event pairs, 672 based on Foata normal form. 75/5925 useless extension candidates. Maximal degree in co-relation 59977. Up to 5317 conditions per place. [2024-06-27 21:03:09,368 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 382 selfloop transitions, 96 changer transitions 0/542 dead transitions. [2024-06-27 21:03:09,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 542 transitions, 10137 flow [2024-06-27 21:03:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:03:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:03:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:03:09,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-27 21:03:09,370 INFO L175 Difference]: Start difference. First operand has 253 places, 478 transitions, 8489 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:03:09,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 542 transitions, 10137 flow [2024-06-27 21:03:09,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 542 transitions, 9978 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:09,977 INFO L231 Difference]: Finished difference. Result has 262 places, 496 transitions, 8869 flow [2024-06-27 21:03:09,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8869, PETRI_PLACES=262, PETRI_TRANSITIONS=496} [2024-06-27 21:03:09,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 21:03:09,977 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 496 transitions, 8869 flow [2024-06-27 21:03:09,977 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) [2024-06-27 21:03:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:09,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:03:09,978 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)] === [2024-06-27 21:03:09,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash 846286065, now seen corresponding path program 7 times [2024-06-27 21:03:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125441967] [2024-06-27 21:03:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:12,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125441967] [2024-06-27 21:03:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125441967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:12,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:12,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:12,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551235515] [2024-06-27 21:03:12,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:12,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:12,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:12,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:12,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 496 transitions, 8869 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:12,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:12,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:12,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:15,018 INFO L124 PetriNetUnfolderBase]: 4095/6119 cut-off events. [2024-06-27 21:03:15,018 INFO L125 PetriNetUnfolderBase]: For 378580/378622 co-relation queries the response was YES. [2024-06-27 21:03:15,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61929 conditions, 6119 events. 4095/6119 cut-off events. For 378580/378622 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31829 event pairs, 753 based on Foata normal form. 46/6164 useless extension candidates. Maximal degree in co-relation 61797. Up to 5746 conditions per place. [2024-06-27 21:03:15,089 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 68 changer transitions 0/550 dead transitions. [2024-06-27 21:03:15,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 550 transitions, 10451 flow [2024-06-27 21:03:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:03:15,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-27 21:03:15,093 INFO L175 Difference]: Start difference. First operand has 262 places, 496 transitions, 8869 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:03:15,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 550 transitions, 10451 flow [2024-06-27 21:03:15,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 550 transitions, 10320 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:15,782 INFO L231 Difference]: Finished difference. Result has 270 places, 503 transitions, 9047 flow [2024-06-27 21:03:15,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8739, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9047, PETRI_PLACES=270, PETRI_TRANSITIONS=503} [2024-06-27 21:03:15,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 21:03:15,783 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 503 transitions, 9047 flow [2024-06-27 21:03:15,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:15,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:15,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:03:15,784 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)] === [2024-06-27 21:03:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 846463695, now seen corresponding path program 8 times [2024-06-27 21:03:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931921541] [2024-06-27 21:03:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:17,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:17,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931921541] [2024-06-27 21:03:17,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931921541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:17,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:17,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:17,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014361004] [2024-06-27 21:03:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:18,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:18,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 503 transitions, 9047 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:18,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:18,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:18,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:20,407 INFO L124 PetriNetUnfolderBase]: 4134/6177 cut-off events. [2024-06-27 21:03:20,408 INFO L125 PetriNetUnfolderBase]: For 394147/394189 co-relation queries the response was YES. [2024-06-27 21:03:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62654 conditions, 6177 events. 4134/6177 cut-off events. For 394147/394189 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 32171 event pairs, 758 based on Foata normal form. 48/6224 useless extension candidates. Maximal degree in co-relation 62520. Up to 5869 conditions per place. [2024-06-27 21:03:20,476 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 489 selfloop transitions, 69 changer transitions 0/561 dead transitions. [2024-06-27 21:03:20,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 561 transitions, 10472 flow [2024-06-27 21:03:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:03:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:03:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 21:03:20,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:03:20,478 INFO L175 Difference]: Start difference. First operand has 270 places, 503 transitions, 9047 flow. Second operand 12 states and 186 transitions. [2024-06-27 21:03:20,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 561 transitions, 10472 flow [2024-06-27 21:03:21,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 561 transitions, 10313 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:21,252 INFO L231 Difference]: Finished difference. Result has 276 places, 509 transitions, 9192 flow [2024-06-27 21:03:21,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8890, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9192, PETRI_PLACES=276, PETRI_TRANSITIONS=509} [2024-06-27 21:03:21,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 21:03:21,252 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 509 transitions, 9192 flow [2024-06-27 21:03:21,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:21,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:21,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:21,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:03:21,253 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)] === [2024-06-27 21:03:21,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:21,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1082645751, now seen corresponding path program 2 times [2024-06-27 21:03:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602267061] [2024-06-27 21:03:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602267061] [2024-06-27 21:03:23,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602267061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:23,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:23,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127665543] [2024-06-27 21:03:23,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:23,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:23,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 509 transitions, 9192 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:23,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:23,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:23,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:25,988 INFO L124 PetriNetUnfolderBase]: 4129/6169 cut-off events. [2024-06-27 21:03:25,988 INFO L125 PetriNetUnfolderBase]: For 400342/400384 co-relation queries the response was YES. [2024-06-27 21:03:26,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62937 conditions, 6169 events. 4129/6169 cut-off events. For 400342/400384 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 32104 event pairs, 754 based on Foata normal form. 44/6212 useless extension candidates. Maximal degree in co-relation 62801. Up to 5901 conditions per place. [2024-06-27 21:03:26,078 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 62 changer transitions 0/539 dead transitions. [2024-06-27 21:03:26,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 539 transitions, 10358 flow [2024-06-27 21:03:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:03:26,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 21:03:26,079 INFO L175 Difference]: Start difference. First operand has 276 places, 509 transitions, 9192 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:03:26,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 539 transitions, 10358 flow [2024-06-27 21:03:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 539 transitions, 10107 flow, removed 53 selfloop flow, removed 11 redundant places. [2024-06-27 21:03:27,020 INFO L231 Difference]: Finished difference. Result has 273 places, 509 transitions, 9078 flow [2024-06-27 21:03:27,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8941, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9078, PETRI_PLACES=273, PETRI_TRANSITIONS=509} [2024-06-27 21:03:27,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 21:03:27,021 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 509 transitions, 9078 flow [2024-06-27 21:03:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:27,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:27,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:27,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:03:27,021 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:27,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1074364845, now seen corresponding path program 9 times [2024-06-27 21:03:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:27,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456732772] [2024-06-27 21:03:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:27,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:29,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:29,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456732772] [2024-06-27 21:03:29,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456732772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:29,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:29,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615019240] [2024-06-27 21:03:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:29,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:29,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 509 transitions, 9078 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:29,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:29,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:31,445 INFO L124 PetriNetUnfolderBase]: 4114/6148 cut-off events. [2024-06-27 21:03:31,446 INFO L125 PetriNetUnfolderBase]: For 410425/410467 co-relation queries the response was YES. [2024-06-27 21:03:31,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62404 conditions, 6148 events. 4114/6148 cut-off events. For 410425/410467 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 31956 event pairs, 752 based on Foata normal form. 48/6195 useless extension candidates. Maximal degree in co-relation 62269. Up to 5841 conditions per place. [2024-06-27 21:03:31,528 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 68 changer transitions 0/547 dead transitions. [2024-06-27 21:03:31,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 547 transitions, 10331 flow [2024-06-27 21:03:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:03:31,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:03:31,529 INFO L175 Difference]: Start difference. First operand has 273 places, 509 transitions, 9078 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:03:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 547 transitions, 10331 flow [2024-06-27 21:03:32,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 547 transitions, 10073 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 21:03:32,470 INFO L231 Difference]: Finished difference. Result has 273 places, 511 transitions, 9018 flow [2024-06-27 21:03:32,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8834, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9018, PETRI_PLACES=273, PETRI_TRANSITIONS=511} [2024-06-27 21:03:32,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 21:03:32,471 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 511 transitions, 9018 flow [2024-06-27 21:03:32,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:32,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:32,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:32,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:03:32,471 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)] === [2024-06-27 21:03:32,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -666904416, now seen corresponding path program 1 times [2024-06-27 21:03:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:32,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592650273] [2024-06-27 21:03:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:33,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:33,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592650273] [2024-06-27 21:03:33,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592650273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:33,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:33,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575889862] [2024-06-27 21:03:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:33,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:33,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 511 transitions, 9018 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:33,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:33,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:33,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:35,517 INFO L124 PetriNetUnfolderBase]: 3993/5950 cut-off events. [2024-06-27 21:03:35,517 INFO L125 PetriNetUnfolderBase]: For 399502/399544 co-relation queries the response was YES. [2024-06-27 21:03:35,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60389 conditions, 5950 events. 3993/5950 cut-off events. For 399502/399544 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 30653 event pairs, 727 based on Foata normal form. 46/5995 useless extension candidates. Maximal degree in co-relation 60254. Up to 5862 conditions per place. [2024-06-27 21:03:35,594 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 487 selfloop transitions, 31 changer transitions 0/521 dead transitions. [2024-06-27 21:03:35,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 521 transitions, 10085 flow [2024-06-27 21:03:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:03:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:03:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-27 21:03:35,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 21:03:35,596 INFO L175 Difference]: Start difference. First operand has 273 places, 511 transitions, 9018 flow. Second operand 5 states and 82 transitions. [2024-06-27 21:03:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 521 transitions, 10085 flow [2024-06-27 21:03:36,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 521 transitions, 9937 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:36,467 INFO L231 Difference]: Finished difference. Result has 272 places, 511 transitions, 8945 flow [2024-06-27 21:03:36,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8870, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8945, PETRI_PLACES=272, PETRI_TRANSITIONS=511} [2024-06-27 21:03:36,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 21:03:36,468 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 511 transitions, 8945 flow [2024-06-27 21:03:36,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:36,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:36,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:36,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:03:36,468 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:36,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1145167048, now seen corresponding path program 1 times [2024-06-27 21:03:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:36,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247325715] [2024-06-27 21:03:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:36,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:38,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247325715] [2024-06-27 21:03:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247325715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:38,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851337043] [2024-06-27 21:03:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:38,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:38,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:38,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:38,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 511 transitions, 8945 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:38,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:38,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:38,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:41,446 INFO L124 PetriNetUnfolderBase]: 4185/6275 cut-off events. [2024-06-27 21:03:41,447 INFO L125 PetriNetUnfolderBase]: For 452809/452837 co-relation queries the response was YES. [2024-06-27 21:03:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63201 conditions, 6275 events. 4185/6275 cut-off events. For 452809/452837 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33080 event pairs, 644 based on Foata normal form. 44/6318 useless extension candidates. Maximal degree in co-relation 63065. Up to 4713 conditions per place. [2024-06-27 21:03:41,661 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 426 selfloop transitions, 156 changer transitions 0/585 dead transitions. [2024-06-27 21:03:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 585 transitions, 10769 flow [2024-06-27 21:03:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 21:03:41,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 21:03:41,663 INFO L175 Difference]: Start difference. First operand has 272 places, 511 transitions, 8945 flow. Second operand 10 states and 184 transitions. [2024-06-27 21:03:41,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 585 transitions, 10769 flow [2024-06-27 21:03:42,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 585 transitions, 10670 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:42,667 INFO L231 Difference]: Finished difference. Result has 279 places, 516 transitions, 9324 flow [2024-06-27 21:03:42,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9324, PETRI_PLACES=279, PETRI_TRANSITIONS=516} [2024-06-27 21:03:42,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 21:03:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 516 transitions, 9324 flow [2024-06-27 21:03:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:42,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:03:42,668 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash 299655440, now seen corresponding path program 2 times [2024-06-27 21:03:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020526578] [2024-06-27 21:03:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020526578] [2024-06-27 21:03:46,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020526578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:46,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726033503] [2024-06-27 21:03:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:46,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:46,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:46,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 516 transitions, 9324 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:46,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:46,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:46,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:48,489 INFO L124 PetriNetUnfolderBase]: 4293/6453 cut-off events. [2024-06-27 21:03:48,489 INFO L125 PetriNetUnfolderBase]: For 483232/483260 co-relation queries the response was YES. [2024-06-27 21:03:48,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65642 conditions, 6453 events. 4293/6453 cut-off events. For 483232/483260 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 34342 event pairs, 753 based on Foata normal form. 52/6504 useless extension candidates. Maximal degree in co-relation 65505. Up to 5463 conditions per place. [2024-06-27 21:03:48,569 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 444 selfloop transitions, 132 changer transitions 0/579 dead transitions. [2024-06-27 21:03:48,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 579 transitions, 10830 flow [2024-06-27 21:03:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 21:03:48,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:03:48,571 INFO L175 Difference]: Start difference. First operand has 279 places, 516 transitions, 9324 flow. Second operand 10 states and 180 transitions. [2024-06-27 21:03:48,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 579 transitions, 10830 flow [2024-06-27 21:03:49,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 579 transitions, 10550 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:49,675 INFO L231 Difference]: Finished difference. Result has 284 places, 519 transitions, 9419 flow [2024-06-27 21:03:49,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9419, PETRI_PLACES=284, PETRI_TRANSITIONS=519} [2024-06-27 21:03:49,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 21:03:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 519 transitions, 9419 flow [2024-06-27 21:03:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:49,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:49,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:03:49,676 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:49,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash -546004690, now seen corresponding path program 3 times [2024-06-27 21:03:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673699919] [2024-06-27 21:03:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:52,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673699919] [2024-06-27 21:03:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673699919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:52,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608333462] [2024-06-27 21:03:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:52,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:52,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:52,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:52,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 519 transitions, 9419 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:52,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:52,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:54,857 INFO L124 PetriNetUnfolderBase]: 4361/6571 cut-off events. [2024-06-27 21:03:54,857 INFO L125 PetriNetUnfolderBase]: For 488582/488610 co-relation queries the response was YES. [2024-06-27 21:03:54,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66665 conditions, 6571 events. 4361/6571 cut-off events. For 488582/488610 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 35314 event pairs, 798 based on Foata normal form. 44/6614 useless extension candidates. Maximal degree in co-relation 66526. Up to 5373 conditions per place. [2024-06-27 21:03:54,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 156 changer transitions 0/586 dead transitions. [2024-06-27 21:03:54,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 586 transitions, 10953 flow [2024-06-27 21:03:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:03:54,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:03:54,955 INFO L175 Difference]: Start difference. First operand has 284 places, 519 transitions, 9419 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:03:54,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 586 transitions, 10953 flow [2024-06-27 21:03:56,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 586 transitions, 10646 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:56,041 INFO L231 Difference]: Finished difference. Result has 287 places, 522 transitions, 9509 flow [2024-06-27 21:03:56,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9112, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9509, PETRI_PLACES=287, PETRI_TRANSITIONS=522} [2024-06-27 21:03:56,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 21:03:56,042 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 522 transitions, 9509 flow [2024-06-27 21:03:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:56,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:56,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:56,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:03:56,042 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:56,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -459309160, now seen corresponding path program 4 times [2024-06-27 21:03:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:56,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251297757] [2024-06-27 21:03:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:56,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:59,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251297757] [2024-06-27 21:03:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251297757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:59,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:59,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274897404] [2024-06-27 21:03:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:59,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:59,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:03:59,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 522 transitions, 9509 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:59,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:03:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:02,241 INFO L124 PetriNetUnfolderBase]: 4449/6712 cut-off events. [2024-06-27 21:04:02,241 INFO L125 PetriNetUnfolderBase]: For 509941/509965 co-relation queries the response was YES. [2024-06-27 21:04:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67930 conditions, 6712 events. 4449/6712 cut-off events. For 509941/509965 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 36245 event pairs, 817 based on Foata normal form. 44/6755 useless extension candidates. Maximal degree in co-relation 67789. Up to 6345 conditions per place. [2024-06-27 21:04:02,322 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 36 changer transitions 0/581 dead transitions. [2024-06-27 21:04:02,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 581 transitions, 10924 flow [2024-06-27 21:04:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:04:02,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:04:02,324 INFO L175 Difference]: Start difference. First operand has 287 places, 522 transitions, 9509 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:04:02,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 581 transitions, 10924 flow [2024-06-27 21:04:03,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 581 transitions, 10700 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:03,124 INFO L231 Difference]: Finished difference. Result has 292 places, 523 transitions, 9402 flow [2024-06-27 21:04:03,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9285, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9402, PETRI_PLACES=292, PETRI_TRANSITIONS=523} [2024-06-27 21:04:03,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 21:04:03,124 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 523 transitions, 9402 flow [2024-06-27 21:04:03,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:03,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:03,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:04:03,125 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:03,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash 386343530, now seen corresponding path program 5 times [2024-06-27 21:04:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625776131] [2024-06-27 21:04:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625776131] [2024-06-27 21:04:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625776131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054709947] [2024-06-27 21:04:05,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:05,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:05,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:05,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:05,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 523 transitions, 9402 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:05,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:05,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:05,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:08,079 INFO L124 PetriNetUnfolderBase]: 4461/6740 cut-off events. [2024-06-27 21:04:08,080 INFO L125 PetriNetUnfolderBase]: For 510276/510300 co-relation queries the response was YES. [2024-06-27 21:04:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67776 conditions, 6740 events. 4461/6740 cut-off events. For 510276/510300 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 36586 event pairs, 801 based on Foata normal form. 40/6779 useless extension candidates. Maximal degree in co-relation 67633. Up to 6239 conditions per place. [2024-06-27 21:04:08,184 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 541 selfloop transitions, 33 changer transitions 0/577 dead transitions. [2024-06-27 21:04:08,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 577 transitions, 10866 flow [2024-06-27 21:04:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:04:08,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:04:08,185 INFO L175 Difference]: Start difference. First operand has 292 places, 523 transitions, 9402 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:04:08,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 577 transitions, 10866 flow [2024-06-27 21:04:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 577 transitions, 10779 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:04:09,326 INFO L231 Difference]: Finished difference. Result has 293 places, 526 transitions, 9490 flow [2024-06-27 21:04:09,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9315, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9490, PETRI_PLACES=293, PETRI_TRANSITIONS=526} [2024-06-27 21:04:09,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 21:04:09,327 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 526 transitions, 9490 flow [2024-06-27 21:04:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:09,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:09,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:04:09,327 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:09,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash -329087246, now seen corresponding path program 6 times [2024-06-27 21:04:09,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:09,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577171864] [2024-06-27 21:04:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:09,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:12,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577171864] [2024-06-27 21:04:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577171864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:12,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:12,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653048145] [2024-06-27 21:04:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:12,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:12,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 526 transitions, 9490 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:12,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:12,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:12,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:14,773 INFO L124 PetriNetUnfolderBase]: 4637/7039 cut-off events. [2024-06-27 21:04:14,773 INFO L125 PetriNetUnfolderBase]: For 563973/563999 co-relation queries the response was YES. [2024-06-27 21:04:14,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69703 conditions, 7039 events. 4637/7039 cut-off events. For 563973/563999 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 38975 event pairs, 870 based on Foata normal form. 66/7104 useless extension candidates. Maximal degree in co-relation 69558. Up to 6494 conditions per place. [2024-06-27 21:04:14,875 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 518 selfloop transitions, 60 changer transitions 0/581 dead transitions. [2024-06-27 21:04:14,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 581 transitions, 10964 flow [2024-06-27 21:04:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:04:14,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:04:14,877 INFO L175 Difference]: Start difference. First operand has 293 places, 526 transitions, 9490 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:04:14,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 581 transitions, 10964 flow [2024-06-27 21:04:15,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 581 transitions, 10897 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:15,927 INFO L231 Difference]: Finished difference. Result has 300 places, 530 transitions, 9654 flow [2024-06-27 21:04:15,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9423, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9654, PETRI_PLACES=300, PETRI_TRANSITIONS=530} [2024-06-27 21:04:15,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 21:04:15,928 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 530 transitions, 9654 flow [2024-06-27 21:04:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:15,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:15,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:15,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:04:15,929 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:15,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash -328872044, now seen corresponding path program 1 times [2024-06-27 21:04:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:15,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879058163] [2024-06-27 21:04:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:15,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:18,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879058163] [2024-06-27 21:04:18,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879058163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:18,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:18,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864159290] [2024-06-27 21:04:18,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:18,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:18,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:18,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:18,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 530 transitions, 9654 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:18,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:18,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:18,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:21,490 INFO L124 PetriNetUnfolderBase]: 4657/7072 cut-off events. [2024-06-27 21:04:21,490 INFO L125 PetriNetUnfolderBase]: For 533889/533915 co-relation queries the response was YES. [2024-06-27 21:04:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70371 conditions, 7072 events. 4657/7072 cut-off events. For 533889/533915 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 39233 event pairs, 871 based on Foata normal form. 30/7101 useless extension candidates. Maximal degree in co-relation 70223. Up to 6779 conditions per place. [2024-06-27 21:04:21,583 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 58 changer transitions 0/571 dead transitions. [2024-06-27 21:04:21,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 571 transitions, 10936 flow [2024-06-27 21:04:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:04:21,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 21:04:21,584 INFO L175 Difference]: Start difference. First operand has 300 places, 530 transitions, 9654 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:04:21,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 571 transitions, 10936 flow [2024-06-27 21:04:22,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 571 transitions, 10813 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:22,853 INFO L231 Difference]: Finished difference. Result has 304 places, 532 transitions, 9693 flow [2024-06-27 21:04:22,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9531, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9693, PETRI_PLACES=304, PETRI_TRANSITIONS=532} [2024-06-27 21:04:22,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 21:04:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 532 transitions, 9693 flow [2024-06-27 21:04:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:22,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:22,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:04:22,854 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:22,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2079678728, now seen corresponding path program 2 times [2024-06-27 21:04:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421773639] [2024-06-27 21:04:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:25,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:25,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421773639] [2024-06-27 21:04:25,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421773639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:25,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:25,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:25,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913447290] [2024-06-27 21:04:25,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:25,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:25,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:25,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:25,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 532 transitions, 9693 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:28,425 INFO L124 PetriNetUnfolderBase]: 4669/7092 cut-off events. [2024-06-27 21:04:28,426 INFO L125 PetriNetUnfolderBase]: For 548351/548377 co-relation queries the response was YES. [2024-06-27 21:04:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70652 conditions, 7092 events. 4669/7092 cut-off events. For 548351/548377 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39388 event pairs, 899 based on Foata normal form. 34/7125 useless extension candidates. Maximal degree in co-relation 70503. Up to 6701 conditions per place. [2024-06-27 21:04:28,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 495 selfloop transitions, 78 changer transitions 0/576 dead transitions. [2024-06-27 21:04:28,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 576 transitions, 11088 flow [2024-06-27 21:04:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:04:28,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:04:28,515 INFO L175 Difference]: Start difference. First operand has 304 places, 532 transitions, 9693 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:04:28,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 576 transitions, 11088 flow [2024-06-27 21:04:29,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 576 transitions, 10953 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:29,753 INFO L231 Difference]: Finished difference. Result has 306 places, 537 transitions, 9872 flow [2024-06-27 21:04:29,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9558, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9872, PETRI_PLACES=306, PETRI_TRANSITIONS=537} [2024-06-27 21:04:29,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 21:04:29,753 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 537 transitions, 9872 flow [2024-06-27 21:04:29,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:29,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:29,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:29,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:04:29,754 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:29,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1180106036, now seen corresponding path program 7 times [2024-06-27 21:04:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125758336] [2024-06-27 21:04:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125758336] [2024-06-27 21:04:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125758336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:32,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264704128] [2024-06-27 21:04:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:32,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:32,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 537 transitions, 9872 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:32,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:32,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:35,145 INFO L124 PetriNetUnfolderBase]: 4783/7276 cut-off events. [2024-06-27 21:04:35,145 INFO L125 PetriNetUnfolderBase]: For 585839/585865 co-relation queries the response was YES. [2024-06-27 21:04:35,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72349 conditions, 7276 events. 4783/7276 cut-off events. For 585839/585865 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40743 event pairs, 911 based on Foata normal form. 46/7321 useless extension candidates. Maximal degree in co-relation 72199. Up to 6739 conditions per place. [2024-06-27 21:04:35,252 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 512 selfloop transitions, 77 changer transitions 0/592 dead transitions. [2024-06-27 21:04:35,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 592 transitions, 11340 flow [2024-06-27 21:04:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:04:35,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 21:04:35,253 INFO L175 Difference]: Start difference. First operand has 306 places, 537 transitions, 9872 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:04:35,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 592 transitions, 11340 flow [2024-06-27 21:04:36,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 592 transitions, 11088 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:36,743 INFO L231 Difference]: Finished difference. Result has 310 places, 541 transitions, 9875 flow [2024-06-27 21:04:36,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9620, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9875, PETRI_PLACES=310, PETRI_TRANSITIONS=541} [2024-06-27 21:04:36,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 21:04:36,744 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 541 transitions, 9875 flow [2024-06-27 21:04:36,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:36,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:36,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:36,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:04:36,744 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:36,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1180100084, now seen corresponding path program 3 times [2024-06-27 21:04:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:36,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360027437] [2024-06-27 21:04:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360027437] [2024-06-27 21:04:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360027437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:39,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:39,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:39,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638835500] [2024-06-27 21:04:39,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:39,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:39,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:39,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:39,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 541 transitions, 9875 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:39,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:39,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:39,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:42,469 INFO L124 PetriNetUnfolderBase]: 4767/7253 cut-off events. [2024-06-27 21:04:42,469 INFO L125 PetriNetUnfolderBase]: For 573497/573523 co-relation queries the response was YES. [2024-06-27 21:04:42,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71742 conditions, 7253 events. 4767/7253 cut-off events. For 573497/573523 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40656 event pairs, 910 based on Foata normal form. 34/7286 useless extension candidates. Maximal degree in co-relation 71590. Up to 6812 conditions per place. [2024-06-27 21:04:42,579 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 91 changer transitions 0/582 dead transitions. [2024-06-27 21:04:42,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 582 transitions, 11174 flow [2024-06-27 21:04:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:04:42,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:04:42,580 INFO L175 Difference]: Start difference. First operand has 310 places, 541 transitions, 9875 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:04:42,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 582 transitions, 11174 flow [2024-06-27 21:04:44,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 582 transitions, 10992 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:44,434 INFO L231 Difference]: Finished difference. Result has 312 places, 541 transitions, 9885 flow [2024-06-27 21:04:44,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9885, PETRI_PLACES=312, PETRI_TRANSITIONS=541} [2024-06-27 21:04:44,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 21:04:44,435 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 541 transitions, 9885 flow [2024-06-27 21:04:44,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:44,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:44,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:04:44,435 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:44,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2085396740, now seen corresponding path program 8 times [2024-06-27 21:04:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715795327] [2024-06-27 21:04:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:46,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:46,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715795327] [2024-06-27 21:04:46,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715795327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:46,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:46,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:46,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622140242] [2024-06-27 21:04:46,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:46,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:46,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 541 transitions, 9885 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:46,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:46,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:49,876 INFO L124 PetriNetUnfolderBase]: 4959/7572 cut-off events. [2024-06-27 21:04:49,876 INFO L125 PetriNetUnfolderBase]: For 637609/637635 co-relation queries the response was YES. [2024-06-27 21:04:49,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74958 conditions, 7572 events. 4959/7572 cut-off events. For 637609/637635 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43046 event pairs, 919 based on Foata normal form. 42/7613 useless extension candidates. Maximal degree in co-relation 74805. Up to 6375 conditions per place. [2024-06-27 21:04:49,988 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 501 selfloop transitions, 102 changer transitions 0/606 dead transitions. [2024-06-27 21:04:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 606 transitions, 11676 flow [2024-06-27 21:04:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:04:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 21:04:49,990 INFO L175 Difference]: Start difference. First operand has 312 places, 541 transitions, 9885 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:04:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 606 transitions, 11676 flow [2024-06-27 21:04:51,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 606 transitions, 11492 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:51,737 INFO L231 Difference]: Finished difference. Result has 317 places, 544 transitions, 10014 flow [2024-06-27 21:04:51,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9701, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10014, PETRI_PLACES=317, PETRI_TRANSITIONS=544} [2024-06-27 21:04:51,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 21:04:51,738 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 544 transitions, 10014 flow [2024-06-27 21:04:51,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:51,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:51,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:04:51,739 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:51,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1180250186, now seen corresponding path program 9 times [2024-06-27 21:04:51,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:51,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770687371] [2024-06-27 21:04:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:54,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:54,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770687371] [2024-06-27 21:04:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770687371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:54,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:54,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675032542] [2024-06-27 21:04:54,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:54,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:54,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:04:54,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 544 transitions, 10014 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:54,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:54,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:04:54,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:57,126 INFO L124 PetriNetUnfolderBase]: 5019/7677 cut-off events. [2024-06-27 21:04:57,126 INFO L125 PetriNetUnfolderBase]: For 658315/658341 co-relation queries the response was YES. [2024-06-27 21:04:57,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75993 conditions, 7677 events. 5019/7677 cut-off events. For 658315/658341 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43957 event pairs, 972 based on Foata normal form. 46/7722 useless extension candidates. Maximal degree in co-relation 75838. Up to 6952 conditions per place. [2024-06-27 21:04:57,219 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 488 selfloop transitions, 106 changer transitions 0/597 dead transitions. [2024-06-27 21:04:57,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 597 transitions, 11465 flow [2024-06-27 21:04:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 21:04:57,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:04:57,221 INFO L175 Difference]: Start difference. First operand has 317 places, 544 transitions, 10014 flow. Second operand 10 states and 171 transitions. [2024-06-27 21:04:57,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 597 transitions, 11465 flow [2024-06-27 21:04:58,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 597 transitions, 11305 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:58,877 INFO L231 Difference]: Finished difference. Result has 320 places, 545 transitions, 10109 flow [2024-06-27 21:04:58,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9856, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10109, PETRI_PLACES=320, PETRI_TRANSITIONS=545} [2024-06-27 21:04:58,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 21:04:58,878 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 545 transitions, 10109 flow [2024-06-27 21:04:58,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:58,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:04:58,879 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:58,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1872464808, now seen corresponding path program 10 times [2024-06-27 21:04:58,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:58,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980927232] [2024-06-27 21:04:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:02,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:02,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980927232] [2024-06-27 21:05:02,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980927232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:02,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:02,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827570516] [2024-06-27 21:05:02,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:02,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:02,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 545 transitions, 10109 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:02,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:02,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:02,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:05,292 INFO L124 PetriNetUnfolderBase]: 5175/7940 cut-off events. [2024-06-27 21:05:05,293 INFO L125 PetriNetUnfolderBase]: For 710607/710649 co-relation queries the response was YES. [2024-06-27 21:05:05,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78224 conditions, 7940 events. 5175/7940 cut-off events. For 710607/710649 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46009 event pairs, 1018 based on Foata normal form. 78/8017 useless extension candidates. Maximal degree in co-relation 78067. Up to 7287 conditions per place. [2024-06-27 21:05:05,417 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 526 selfloop transitions, 74 changer transitions 0/603 dead transitions. [2024-06-27 21:05:05,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 603 transitions, 11653 flow [2024-06-27 21:05:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:05:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:05:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:05:05,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:05:05,418 INFO L175 Difference]: Start difference. First operand has 320 places, 545 transitions, 10109 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:05:05,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 603 transitions, 11653 flow [2024-06-27 21:05:07,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 603 transitions, 11398 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:07,128 INFO L231 Difference]: Finished difference. Result has 322 places, 547 transitions, 10092 flow [2024-06-27 21:05:07,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10092, PETRI_PLACES=322, PETRI_TRANSITIONS=547} [2024-06-27 21:05:07,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 21:05:07,129 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 547 transitions, 10092 flow [2024-06-27 21:05:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:07,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:07,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:07,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:05:07,129 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:07,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1525018926, now seen corresponding path program 11 times [2024-06-27 21:05:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047174091] [2024-06-27 21:05:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:09,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:09,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047174091] [2024-06-27 21:05:09,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047174091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:09,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:09,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:09,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026380057] [2024-06-27 21:05:09,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:09,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:09,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:09,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 547 transitions, 10092 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:09,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:09,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:09,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:12,810 INFO L124 PetriNetUnfolderBase]: 5243/8056 cut-off events. [2024-06-27 21:05:12,810 INFO L125 PetriNetUnfolderBase]: For 699035/699077 co-relation queries the response was YES. [2024-06-27 21:05:12,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79010 conditions, 8056 events. 5243/8056 cut-off events. For 699035/699077 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46999 event pairs, 1000 based on Foata normal form. 58/8113 useless extension candidates. Maximal degree in co-relation 78853. Up to 7036 conditions per place. [2024-06-27 21:05:12,932 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 96 changer transitions 0/604 dead transitions. [2024-06-27 21:05:12,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 604 transitions, 11868 flow [2024-06-27 21:05:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:05:12,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 21:05:12,933 INFO L175 Difference]: Start difference. First operand has 322 places, 547 transitions, 10092 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:05:12,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 604 transitions, 11868 flow [2024-06-27 21:05:14,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 604 transitions, 11693 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:14,745 INFO L231 Difference]: Finished difference. Result has 324 places, 550 transitions, 10224 flow [2024-06-27 21:05:14,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9917, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10224, PETRI_PLACES=324, PETRI_TRANSITIONS=550} [2024-06-27 21:05:14,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 21:05:14,745 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 550 transitions, 10224 flow [2024-06-27 21:05:14,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:14,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:14,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:14,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:05:14,746 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:14,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1530535128, now seen corresponding path program 4 times [2024-06-27 21:05:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:14,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375093250] [2024-06-27 21:05:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:17,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:17,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375093250] [2024-06-27 21:05:17,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375093250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:17,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:17,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:17,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123169595] [2024-06-27 21:05:17,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:17,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:17,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 550 transitions, 10224 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:17,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:17,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:17,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:20,592 INFO L124 PetriNetUnfolderBase]: 5263/8089 cut-off events. [2024-06-27 21:05:20,592 INFO L125 PetriNetUnfolderBase]: For 698927/698969 co-relation queries the response was YES. [2024-06-27 21:05:20,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79659 conditions, 8089 events. 5263/8089 cut-off events. For 698927/698969 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 47324 event pairs, 1039 based on Foata normal form. 46/8134 useless extension candidates. Maximal degree in co-relation 79500. Up to 7792 conditions per place. [2024-06-27 21:05:20,702 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 63 changer transitions 0/589 dead transitions. [2024-06-27 21:05:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 589 transitions, 11590 flow [2024-06-27 21:05:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:05:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 21:05:20,703 INFO L175 Difference]: Start difference. First operand has 324 places, 550 transitions, 10224 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:05:20,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 589 transitions, 11590 flow [2024-06-27 21:05:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 589 transitions, 11446 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:22,521 INFO L231 Difference]: Finished difference. Result has 328 places, 552 transitions, 10296 flow [2024-06-27 21:05:22,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10296, PETRI_PLACES=328, PETRI_TRANSITIONS=552} [2024-06-27 21:05:22,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 21:05:22,522 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 552 transitions, 10296 flow [2024-06-27 21:05:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:22,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:22,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:22,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:05:22,523 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:22,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1530744378, now seen corresponding path program 5 times [2024-06-27 21:05:22,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:22,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042260307] [2024-06-27 21:05:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:25,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042260307] [2024-06-27 21:05:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042260307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:25,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:25,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135398693] [2024-06-27 21:05:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:25,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:25,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:25,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:25,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 552 transitions, 10296 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:25,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:25,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:25,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:28,501 INFO L124 PetriNetUnfolderBase]: 5422/8329 cut-off events. [2024-06-27 21:05:28,502 INFO L125 PetriNetUnfolderBase]: For 763747/763789 co-relation queries the response was YES. [2024-06-27 21:05:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83587 conditions, 8329 events. 5422/8329 cut-off events. For 763747/763789 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 48859 event pairs, 967 based on Foata normal form. 46/8374 useless extension candidates. Maximal degree in co-relation 83426. Up to 6930 conditions per place. [2024-06-27 21:05:28,826 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 448 selfloop transitions, 175 changer transitions 0/626 dead transitions. [2024-06-27 21:05:28,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 626 transitions, 12485 flow [2024-06-27 21:05:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:05:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 21:05:28,829 INFO L175 Difference]: Start difference. First operand has 328 places, 552 transitions, 10296 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:05:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 626 transitions, 12485 flow [2024-06-27 21:05:30,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 626 transitions, 12213 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 21:05:30,761 INFO L231 Difference]: Finished difference. Result has 331 places, 566 transitions, 10872 flow [2024-06-27 21:05:30,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10100, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10872, PETRI_PLACES=331, PETRI_TRANSITIONS=566} [2024-06-27 21:05:30,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 21:05:30,762 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 566 transitions, 10872 flow [2024-06-27 21:05:30,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:30,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:30,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:05:30,762 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1530529176, now seen corresponding path program 12 times [2024-06-27 21:05:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364805801] [2024-06-27 21:05:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:30,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364805801] [2024-06-27 21:05:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364805801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:33,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:33,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:33,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969549395] [2024-06-27 21:05:33,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:33,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:33,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 566 transitions, 10872 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:33,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:33,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:33,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:36,312 INFO L124 PetriNetUnfolderBase]: 5510/8477 cut-off events. [2024-06-27 21:05:36,312 INFO L125 PetriNetUnfolderBase]: For 823883/823925 co-relation queries the response was YES. [2024-06-27 21:05:36,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86642 conditions, 8477 events. 5510/8477 cut-off events. For 823883/823925 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 50074 event pairs, 1086 based on Foata normal form. 62/8538 useless extension candidates. Maximal degree in co-relation 86479. Up to 8011 conditions per place. [2024-06-27 21:05:36,442 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 556 selfloop transitions, 70 changer transitions 0/629 dead transitions. [2024-06-27 21:05:36,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 629 transitions, 12399 flow [2024-06-27 21:05:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:05:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:05:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 21:05:36,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 21:05:36,443 INFO L175 Difference]: Start difference. First operand has 331 places, 566 transitions, 10872 flow. Second operand 13 states and 203 transitions. [2024-06-27 21:05:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 629 transitions, 12399 flow [2024-06-27 21:05:38,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 629 transitions, 12299 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:38,582 INFO L231 Difference]: Finished difference. Result has 338 places, 567 transitions, 10957 flow [2024-06-27 21:05:38,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10772, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10957, PETRI_PLACES=338, PETRI_TRANSITIONS=567} [2024-06-27 21:05:38,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 21:05:38,582 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 567 transitions, 10957 flow [2024-06-27 21:05:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:38,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:38,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:38,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:05:38,583 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:38,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1054218504, now seen corresponding path program 6 times [2024-06-27 21:05:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:38,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666790020] [2024-06-27 21:05:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:41,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:41,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666790020] [2024-06-27 21:05:41,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666790020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:41,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:41,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875729890] [2024-06-27 21:05:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:41,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:41,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:41,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 567 transitions, 10957 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:41,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:41,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:44,701 INFO L124 PetriNetUnfolderBase]: 5494/8452 cut-off events. [2024-06-27 21:05:44,701 INFO L125 PetriNetUnfolderBase]: For 804339/804381 co-relation queries the response was YES. [2024-06-27 21:05:44,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86303 conditions, 8452 events. 5494/8452 cut-off events. For 804339/804381 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49947 event pairs, 1092 based on Foata normal form. 50/8501 useless extension candidates. Maximal degree in co-relation 86138. Up to 8140 conditions per place. [2024-06-27 21:05:44,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 538 selfloop transitions, 66 changer transitions 0/607 dead transitions. [2024-06-27 21:05:44,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 607 transitions, 12407 flow [2024-06-27 21:05:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:05:44,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 21:05:44,826 INFO L175 Difference]: Start difference. First operand has 338 places, 567 transitions, 10957 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:05:44,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 607 transitions, 12407 flow [2024-06-27 21:05:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 607 transitions, 12258 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 21:05:46,903 INFO L231 Difference]: Finished difference. Result has 336 places, 571 transitions, 11087 flow [2024-06-27 21:05:46,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11087, PETRI_PLACES=336, PETRI_TRANSITIONS=571} [2024-06-27 21:05:46,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 21:05:46,904 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 571 transitions, 11087 flow [2024-06-27 21:05:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:46,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:05:46,904 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:46,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash 5745436, now seen corresponding path program 7 times [2024-06-27 21:05:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590645281] [2024-06-27 21:05:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590645281] [2024-06-27 21:05:49,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590645281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:49,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456955091] [2024-06-27 21:05:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:49,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:49,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:49,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 571 transitions, 11087 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:49,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:49,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:49,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:52,806 INFO L124 PetriNetUnfolderBase]: 5514/8484 cut-off events. [2024-06-27 21:05:52,806 INFO L125 PetriNetUnfolderBase]: For 817544/817586 co-relation queries the response was YES. [2024-06-27 21:05:52,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86865 conditions, 8484 events. 5514/8484 cut-off events. For 817544/817586 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50148 event pairs, 1092 based on Foata normal form. 46/8529 useless extension candidates. Maximal degree in co-relation 86699. Up to 8199 conditions per place. [2024-06-27 21:05:52,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 547 selfloop transitions, 59 changer transitions 0/609 dead transitions. [2024-06-27 21:05:52,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 609 transitions, 12448 flow [2024-06-27 21:05:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:05:52,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:05:52,925 INFO L175 Difference]: Start difference. First operand has 336 places, 571 transitions, 11087 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:05:52,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 609 transitions, 12448 flow [2024-06-27 21:05:54,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 609 transitions, 12216 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:54,819 INFO L231 Difference]: Finished difference. Result has 338 places, 573 transitions, 11030 flow [2024-06-27 21:05:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11030, PETRI_PLACES=338, PETRI_TRANSITIONS=573} [2024-06-27 21:05:54,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 21:05:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 573 transitions, 11030 flow [2024-06-27 21:05:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:54,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:54,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:05:54,821 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 5530234, now seen corresponding path program 13 times [2024-06-27 21:05:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075287787] [2024-06-27 21:05:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:57,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:57,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075287787] [2024-06-27 21:05:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075287787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:57,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:57,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465673908] [2024-06-27 21:05:57,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:57,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:57,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:05:57,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 573 transitions, 11030 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:57,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:57,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:05:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:00,367 INFO L124 PetriNetUnfolderBase]: 5478/8428 cut-off events. [2024-06-27 21:06:00,368 INFO L125 PetriNetUnfolderBase]: For 826848/826890 co-relation queries the response was YES. [2024-06-27 21:06:00,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85175 conditions, 8428 events. 5478/8428 cut-off events. For 826848/826890 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 49703 event pairs, 1080 based on Foata normal form. 62/8489 useless extension candidates. Maximal degree in co-relation 85008. Up to 7963 conditions per place. [2024-06-27 21:06:00,507 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 554 selfloop transitions, 73 changer transitions 0/630 dead transitions. [2024-06-27 21:06:00,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 630 transitions, 12541 flow [2024-06-27 21:06:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:06:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:06:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 21:06:00,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:06:00,509 INFO L175 Difference]: Start difference. First operand has 338 places, 573 transitions, 11030 flow. Second operand 12 states and 188 transitions. [2024-06-27 21:06:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 630 transitions, 12541 flow [2024-06-27 21:06:02,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 630 transitions, 12370 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:02,513 INFO L231 Difference]: Finished difference. Result has 343 places, 574 transitions, 11052 flow [2024-06-27 21:06:02,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10871, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11052, PETRI_PLACES=343, PETRI_TRANSITIONS=574} [2024-06-27 21:06:02,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 21:06:02,514 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 574 transitions, 11052 flow [2024-06-27 21:06:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:02,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:02,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:06:02,514 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 271442716, now seen corresponding path program 8 times [2024-06-27 21:06:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:02,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773908916] [2024-06-27 21:06:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:05,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:05,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773908916] [2024-06-27 21:06:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773908916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:05,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372765342] [2024-06-27 21:06:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:05,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:05,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 574 transitions, 11052 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:08,691 INFO L124 PetriNetUnfolderBase]: 5616/8628 cut-off events. [2024-06-27 21:06:08,691 INFO L125 PetriNetUnfolderBase]: For 863309/863351 co-relation queries the response was YES. [2024-06-27 21:06:08,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88705 conditions, 8628 events. 5616/8628 cut-off events. For 863309/863351 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50871 event pairs, 979 based on Foata normal form. 46/8673 useless extension candidates. Maximal degree in co-relation 88537. Up to 7543 conditions per place. [2024-06-27 21:06:08,867 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 530 selfloop transitions, 121 changer transitions 0/654 dead transitions. [2024-06-27 21:06:08,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 654 transitions, 13311 flow [2024-06-27 21:06:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:06:08,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 21:06:08,868 INFO L175 Difference]: Start difference. First operand has 343 places, 574 transitions, 11052 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:06:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 654 transitions, 13311 flow [2024-06-27 21:06:11,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 654 transitions, 13164 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 21:06:11,332 INFO L231 Difference]: Finished difference. Result has 344 places, 588 transitions, 11552 flow [2024-06-27 21:06:11,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10907, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11552, PETRI_PLACES=344, PETRI_TRANSITIONS=588} [2024-06-27 21:06:11,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 21:06:11,332 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 588 transitions, 11552 flow [2024-06-27 21:06:11,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:11,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:11,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:06:11,333 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:11,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash 908023362, now seen corresponding path program 1 times [2024-06-27 21:06:11,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:11,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211249206] [2024-06-27 21:06:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:11,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211249206] [2024-06-27 21:06:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211249206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863731557] [2024-06-27 21:06:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:14,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:14,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:14,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:14,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 588 transitions, 11552 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:14,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:14,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:14,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:17,587 INFO L124 PetriNetUnfolderBase]: 5664/8714 cut-off events. [2024-06-27 21:06:17,588 INFO L125 PetriNetUnfolderBase]: For 915232/915258 co-relation queries the response was YES. [2024-06-27 21:06:17,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90935 conditions, 8714 events. 5664/8714 cut-off events. For 915232/915258 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51741 event pairs, 1116 based on Foata normal form. 38/8751 useless extension candidates. Maximal degree in co-relation 90765. Up to 8131 conditions per place. [2024-06-27 21:06:17,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 80 changer transitions 0/636 dead transitions. [2024-06-27 21:06:17,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 636 transitions, 13019 flow [2024-06-27 21:06:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:06:17,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 21:06:17,716 INFO L175 Difference]: Start difference. First operand has 344 places, 588 transitions, 11552 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:06:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 636 transitions, 13019 flow [2024-06-27 21:06:19,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 636 transitions, 12904 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:19,781 INFO L231 Difference]: Finished difference. Result has 348 places, 589 transitions, 11657 flow [2024-06-27 21:06:19,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11437, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11657, PETRI_PLACES=348, PETRI_TRANSITIONS=589} [2024-06-27 21:06:19,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 21:06:19,782 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 589 transitions, 11657 flow [2024-06-27 21:06:19,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:19,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:19,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:19,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:06:19,782 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:19,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1719106010, now seen corresponding path program 2 times [2024-06-27 21:06:19,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:19,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374139070] [2024-06-27 21:06:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:23,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374139070] [2024-06-27 21:06:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374139070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:23,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:23,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:06:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749636342] [2024-06-27 21:06:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:23,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:06:23,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:06:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:06:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:23,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 589 transitions, 11657 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:23,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:23,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:23,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:26,635 INFO L124 PetriNetUnfolderBase]: 5712/8797 cut-off events. [2024-06-27 21:06:26,635 INFO L125 PetriNetUnfolderBase]: For 940860/940886 co-relation queries the response was YES. [2024-06-27 21:06:26,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91997 conditions, 8797 events. 5712/8797 cut-off events. For 940860/940886 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52517 event pairs, 1153 based on Foata normal form. 38/8834 useless extension candidates. Maximal degree in co-relation 91825. Up to 8260 conditions per place. [2024-06-27 21:06:26,764 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 542 selfloop transitions, 92 changer transitions 0/637 dead transitions. [2024-06-27 21:06:26,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 637 transitions, 13128 flow [2024-06-27 21:06:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:06:26,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 21:06:26,765 INFO L175 Difference]: Start difference. First operand has 348 places, 589 transitions, 11657 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:06:26,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 637 transitions, 13128 flow [2024-06-27 21:06:29,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 637 transitions, 12827 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 21:06:29,598 INFO L231 Difference]: Finished difference. Result has 348 places, 590 transitions, 11599 flow [2024-06-27 21:06:29,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11599, PETRI_PLACES=348, PETRI_TRANSITIONS=590} [2024-06-27 21:06:29,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 21:06:29,599 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 590 transitions, 11599 flow [2024-06-27 21:06:29,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:29,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:29,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:29,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:06:29,599 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:29,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2050878980, now seen corresponding path program 3 times [2024-06-27 21:06:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:29,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709360160] [2024-06-27 21:06:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:32,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709360160] [2024-06-27 21:06:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709360160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:32,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:32,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531171389] [2024-06-27 21:06:32,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:32,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:32,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 590 transitions, 11599 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:32,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:32,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:32,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:36,082 INFO L124 PetriNetUnfolderBase]: 5684/8754 cut-off events. [2024-06-27 21:06:36,082 INFO L125 PetriNetUnfolderBase]: For 931670/931696 co-relation queries the response was YES. [2024-06-27 21:06:36,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90258 conditions, 8754 events. 5684/8754 cut-off events. For 931670/931696 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52103 event pairs, 1144 based on Foata normal form. 42/8795 useless extension candidates. Maximal degree in co-relation 90087. Up to 8136 conditions per place. [2024-06-27 21:06:36,227 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 559 selfloop transitions, 78 changer transitions 0/640 dead transitions. [2024-06-27 21:06:36,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 640 transitions, 13114 flow [2024-06-27 21:06:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:06:36,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 21:06:36,229 INFO L175 Difference]: Start difference. First operand has 348 places, 590 transitions, 11599 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:06:36,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 640 transitions, 13114 flow [2024-06-27 21:06:38,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 640 transitions, 12867 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:38,639 INFO L231 Difference]: Finished difference. Result has 350 places, 591 transitions, 11554 flow [2024-06-27 21:06:38,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11554, PETRI_PLACES=350, PETRI_TRANSITIONS=591} [2024-06-27 21:06:38,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 21:06:38,640 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 591 transitions, 11554 flow [2024-06-27 21:06:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:38,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:38,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:38,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:06:38,640 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:38,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1605096896, now seen corresponding path program 4 times [2024-06-27 21:06:38,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:38,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912907414] [2024-06-27 21:06:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:38,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:42,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:42,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912907414] [2024-06-27 21:06:42,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912907414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:42,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:06:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713471717] [2024-06-27 21:06:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:06:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:06:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:06:42,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:42,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 591 transitions, 11554 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:42,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:42,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:45,579 INFO L124 PetriNetUnfolderBase]: 5732/8838 cut-off events. [2024-06-27 21:06:45,579 INFO L125 PetriNetUnfolderBase]: For 943213/943239 co-relation queries the response was YES. [2024-06-27 21:06:45,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90744 conditions, 8838 events. 5732/8838 cut-off events. For 943213/943239 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52953 event pairs, 1146 based on Foata normal form. 38/8875 useless extension candidates. Maximal degree in co-relation 90572. Up to 8461 conditions per place. [2024-06-27 21:06:45,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 59 changer transitions 0/639 dead transitions. [2024-06-27 21:06:45,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 639 transitions, 13015 flow [2024-06-27 21:06:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:06:45,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-27 21:06:45,712 INFO L175 Difference]: Start difference. First operand has 350 places, 591 transitions, 11554 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:06:45,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 639 transitions, 13015 flow [2024-06-27 21:06:48,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 639 transitions, 12861 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:48,595 INFO L231 Difference]: Finished difference. Result has 352 places, 592 transitions, 11574 flow [2024-06-27 21:06:48,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11400, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11574, PETRI_PLACES=352, PETRI_TRANSITIONS=592} [2024-06-27 21:06:48,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 21:06:48,596 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 592 transitions, 11574 flow [2024-06-27 21:06:48,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:48,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:06:48,596 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:48,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2040945382, now seen corresponding path program 5 times [2024-06-27 21:06:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49339180] [2024-06-27 21:06:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49339180] [2024-06-27 21:06:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49339180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:51,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:51,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:06:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101843709] [2024-06-27 21:06:51,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:06:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:06:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:06:51,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:06:51,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 592 transitions, 11574 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:51,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:51,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:06:51,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:55,393 INFO L124 PetriNetUnfolderBase]: 5780/8921 cut-off events. [2024-06-27 21:06:55,393 INFO L125 PetriNetUnfolderBase]: For 969074/969116 co-relation queries the response was YES. [2024-06-27 21:06:55,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91511 conditions, 8921 events. 5780/8921 cut-off events. For 969074/969116 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 53588 event pairs, 1154 based on Foata normal form. 54/8974 useless extension candidates. Maximal degree in co-relation 91338. Up to 8512 conditions per place. [2024-06-27 21:06:55,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 572 selfloop transitions, 63 changer transitions 0/638 dead transitions. [2024-06-27 21:06:55,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 638 transitions, 13046 flow [2024-06-27 21:06:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 21:06:55,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:06:55,522 INFO L175 Difference]: Start difference. First operand has 352 places, 592 transitions, 11574 flow. Second operand 10 states and 160 transitions. [2024-06-27 21:06:55,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 638 transitions, 13046 flow [2024-06-27 21:06:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 638 transitions, 12886 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:58,250 INFO L231 Difference]: Finished difference. Result has 354 places, 593 transitions, 11599 flow [2024-06-27 21:06:58,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11414, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11599, PETRI_PLACES=354, PETRI_TRANSITIONS=593} [2024-06-27 21:06:58,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 21:06:58,251 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 593 transitions, 11599 flow [2024-06-27 21:06:58,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:06:58,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:06:58,251 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:58,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1678966620, now seen corresponding path program 6 times [2024-06-27 21:06:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026734001] [2024-06-27 21:06:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:01,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:01,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026734001] [2024-06-27 21:07:01,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026734001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:01,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:01,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:07:01,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106671651] [2024-06-27 21:07:01,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:01,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:07:01,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:07:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:07:01,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:01,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 593 transitions, 11599 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:01,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:01,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:01,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:05,185 INFO L124 PetriNetUnfolderBase]: 5828/9004 cut-off events. [2024-06-27 21:07:05,186 INFO L125 PetriNetUnfolderBase]: For 992238/992280 co-relation queries the response was YES. [2024-06-27 21:07:05,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92162 conditions, 9004 events. 5828/9004 cut-off events. For 992238/992280 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 54335 event pairs, 1182 based on Foata normal form. 54/9057 useless extension candidates. Maximal degree in co-relation 91988. Up to 8596 conditions per place. [2024-06-27 21:07:05,315 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 71 changer transitions 0/648 dead transitions. [2024-06-27 21:07:05,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 648 transitions, 13115 flow [2024-06-27 21:07:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-27 21:07:05,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2024-06-27 21:07:05,317 INFO L175 Difference]: Start difference. First operand has 354 places, 593 transitions, 11599 flow. Second operand 12 states and 185 transitions. [2024-06-27 21:07:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 648 transitions, 13115 flow [2024-06-27 21:07:07,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 648 transitions, 12946 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 21:07:07,823 INFO L231 Difference]: Finished difference. Result has 358 places, 594 transitions, 11633 flow [2024-06-27 21:07:07,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11633, PETRI_PLACES=358, PETRI_TRANSITIONS=594} [2024-06-27 21:07:07,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 21:07:07,824 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 594 transitions, 11633 flow [2024-06-27 21:07:07,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:07,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:07,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:07,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:07:07,824 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:07,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash 208437338, now seen corresponding path program 7 times [2024-06-27 21:07:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422697153] [2024-06-27 21:07:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:11,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422697153] [2024-06-27 21:07:11,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422697153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:11,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:11,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:07:11,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988032933] [2024-06-27 21:07:11,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:11,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:07:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:07:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:07:11,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:11,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 594 transitions, 11633 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:11,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:11,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:11,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:14,624 INFO L124 PetriNetUnfolderBase]: 5876/9089 cut-off events. [2024-06-27 21:07:14,624 INFO L125 PetriNetUnfolderBase]: For 1016936/1016978 co-relation queries the response was YES. [2024-06-27 21:07:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92855 conditions, 9089 events. 5876/9089 cut-off events. For 1016936/1016978 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 55113 event pairs, 1172 based on Foata normal form. 54/9142 useless extension candidates. Maximal degree in co-relation 92680. Up to 8719 conditions per place. [2024-06-27 21:07:14,760 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 56 changer transitions 0/640 dead transitions. [2024-06-27 21:07:14,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 640 transitions, 13101 flow [2024-06-27 21:07:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:07:14,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 21:07:14,761 INFO L175 Difference]: Start difference. First operand has 358 places, 594 transitions, 11633 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:07:14,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 640 transitions, 13101 flow [2024-06-27 21:07:17,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 640 transitions, 12914 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:17,474 INFO L231 Difference]: Finished difference. Result has 358 places, 595 transitions, 11620 flow [2024-06-27 21:07:17,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11446, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=358, PETRI_TRANSITIONS=595} [2024-06-27 21:07:17,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 21:07:17,475 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 595 transitions, 11620 flow [2024-06-27 21:07:17,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:17,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:17,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:07:17,476 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:17,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1679197260, now seen corresponding path program 8 times [2024-06-27 21:07:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570315405] [2024-06-27 21:07:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:21,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:21,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570315405] [2024-06-27 21:07:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570315405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:07:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050375670] [2024-06-27 21:07:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:21,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:07:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:07:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:07:21,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:21,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 595 transitions, 11620 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:21,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:21,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:21,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:24,829 INFO L124 PetriNetUnfolderBase]: 5924/9172 cut-off events. [2024-06-27 21:07:24,829 INFO L125 PetriNetUnfolderBase]: For 1041299/1041341 co-relation queries the response was YES. [2024-06-27 21:07:24,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93410 conditions, 9172 events. 5924/9172 cut-off events. For 1041299/1041341 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55797 event pairs, 1200 based on Foata normal form. 54/9225 useless extension candidates. Maximal degree in co-relation 93234. Up to 8803 conditions per place. [2024-06-27 21:07:24,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 60 changer transitions 0/640 dead transitions. [2024-06-27 21:07:24,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 640 transitions, 13083 flow [2024-06-27 21:07:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 21:07:24,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-27 21:07:24,966 INFO L175 Difference]: Start difference. First operand has 358 places, 595 transitions, 11620 flow. Second operand 10 states and 157 transitions. [2024-06-27 21:07:24,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 640 transitions, 13083 flow [2024-06-27 21:07:28,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 640 transitions, 12923 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 21:07:28,073 INFO L231 Difference]: Finished difference. Result has 360 places, 596 transitions, 11644 flow [2024-06-27 21:07:28,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11644, PETRI_PLACES=360, PETRI_TRANSITIONS=596} [2024-06-27 21:07:28,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 21:07:28,074 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 596 transitions, 11644 flow [2024-06-27 21:07:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-06-27 21:07:28,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:28,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:28,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:07:28,075 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:28,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885870, now seen corresponding path program 9 times [2024-06-27 21:07:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429743737] [2024-06-27 21:07:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:30,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429743737] [2024-06-27 21:07:30,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429743737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:30,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:30,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:30,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223567168] [2024-06-27 21:07:30,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:30,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:30,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:30,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 596 transitions, 11644 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:30,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:34,075 INFO L124 PetriNetUnfolderBase]: 5904/9140 cut-off events. [2024-06-27 21:07:34,075 INFO L125 PetriNetUnfolderBase]: For 1027122/1027164 co-relation queries the response was YES. [2024-06-27 21:07:34,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92314 conditions, 9140 events. 5904/9140 cut-off events. For 1027122/1027164 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55428 event pairs, 1051 based on Foata normal form. 54/9193 useless extension candidates. Maximal degree in co-relation 92137. Up to 8671 conditions per place. [2024-06-27 21:07:34,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 571 selfloop transitions, 66 changer transitions 0/640 dead transitions. [2024-06-27 21:07:34,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 640 transitions, 12901 flow [2024-06-27 21:07:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:07:34,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 21:07:34,202 INFO L175 Difference]: Start difference. First operand has 360 places, 596 transitions, 11644 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:07:34,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 640 transitions, 12901 flow [2024-06-27 21:07:36,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 640 transitions, 12721 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 21:07:36,926 INFO L231 Difference]: Finished difference. Result has 361 places, 595 transitions, 11448 flow [2024-06-27 21:07:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11312, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11448, PETRI_PLACES=361, PETRI_TRANSITIONS=595} [2024-06-27 21:07:36,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 21:07:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 595 transitions, 11448 flow [2024-06-27 21:07:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:07:36,927 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)] === [2024-06-27 21:07:36,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1008184373, now seen corresponding path program 1 times [2024-06-27 21:07:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21678432] [2024-06-27 21:07:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:38,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21678432] [2024-06-27 21:07:38,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21678432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:38,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:38,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:38,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551775592] [2024-06-27 21:07:38,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:38,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:38,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:38,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:38,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:38,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 595 transitions, 11448 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:38,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:38,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:38,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:41,967 INFO L124 PetriNetUnfolderBase]: 5914/9160 cut-off events. [2024-06-27 21:07:41,967 INFO L125 PetriNetUnfolderBase]: For 976125/976125 co-relation queries the response was YES. [2024-06-27 21:07:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91935 conditions, 9160 events. 5914/9160 cut-off events. For 976125/976125 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55768 event pairs, 1345 based on Foata normal form. 2/9161 useless extension candidates. Maximal degree in co-relation 91757. Up to 9075 conditions per place. [2024-06-27 21:07:42,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 596 selfloop transitions, 24 changer transitions 0/623 dead transitions. [2024-06-27 21:07:42,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 623 transitions, 13070 flow [2024-06-27 21:07:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:07:42,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-27 21:07:42,125 INFO L175 Difference]: Start difference. First operand has 361 places, 595 transitions, 11448 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:07:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 623 transitions, 13070 flow [2024-06-27 21:07:45,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 623 transitions, 12795 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:45,201 INFO L231 Difference]: Finished difference. Result has 358 places, 601 transitions, 11378 flow [2024-06-27 21:07:45,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11173, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11378, PETRI_PLACES=358, PETRI_TRANSITIONS=601} [2024-06-27 21:07:45,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 21:07:45,202 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 601 transitions, 11378 flow [2024-06-27 21:07:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:45,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:45,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:45,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:07:45,202 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)] === [2024-06-27 21:07:45,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1008304529, now seen corresponding path program 1 times [2024-06-27 21:07:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643726634] [2024-06-27 21:07:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643726634] [2024-06-27 21:07:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643726634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:47,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598466831] [2024-06-27 21:07:47,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:47,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 601 transitions, 11378 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:47,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:47,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:47,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:50,289 INFO L124 PetriNetUnfolderBase]: 5969/9231 cut-off events. [2024-06-27 21:07:50,289 INFO L125 PetriNetUnfolderBase]: For 1000348/1000390 co-relation queries the response was YES. [2024-06-27 21:07:50,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92386 conditions, 9231 events. 5969/9231 cut-off events. For 1000348/1000390 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56117 event pairs, 1212 based on Foata normal form. 46/9276 useless extension candidates. Maximal degree in co-relation 92209. Up to 8958 conditions per place. [2024-06-27 21:07:50,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 101 changer transitions 0/645 dead transitions. [2024-06-27 21:07:50,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 645 transitions, 13366 flow [2024-06-27 21:07:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:07:50,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 21:07:50,440 INFO L175 Difference]: Start difference. First operand has 358 places, 601 transitions, 11378 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:07:50,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 645 transitions, 13366 flow [2024-06-27 21:07:53,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 645 transitions, 13273 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:53,631 INFO L231 Difference]: Finished difference. Result has 363 places, 625 transitions, 11999 flow [2024-06-27 21:07:53,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11288, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11999, PETRI_PLACES=363, PETRI_TRANSITIONS=625} [2024-06-27 21:07:53,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 21:07:53,631 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 625 transitions, 11999 flow [2024-06-27 21:07:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:53,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:53,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:07:53,632 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)] === [2024-06-27 21:07:53,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1008304343, now seen corresponding path program 2 times [2024-06-27 21:07:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600043012] [2024-06-27 21:07:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600043012] [2024-06-27 21:07:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600043012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:55,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643509617] [2024-06-27 21:07:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:55,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:07:55,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 625 transitions, 11999 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:55,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:55,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:07:55,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:59,066 INFO L124 PetriNetUnfolderBase]: 5979/9251 cut-off events. [2024-06-27 21:07:59,066 INFO L125 PetriNetUnfolderBase]: For 1021610/1021610 co-relation queries the response was YES. [2024-06-27 21:07:59,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93073 conditions, 9251 events. 5979/9251 cut-off events. For 1021610/1021610 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56347 event pairs, 1340 based on Foata normal form. 2/9252 useless extension candidates. Maximal degree in co-relation 92893. Up to 9198 conditions per place. [2024-06-27 21:07:59,213 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 622 selfloop transitions, 20 changer transitions 0/645 dead transitions. [2024-06-27 21:07:59,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 645 transitions, 13422 flow [2024-06-27 21:07:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 21:07:59,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-27 21:07:59,214 INFO L175 Difference]: Start difference. First operand has 363 places, 625 transitions, 11999 flow. Second operand 7 states and 102 transitions. [2024-06-27 21:07:59,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 645 transitions, 13422 flow [2024-06-27 21:08:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 645 transitions, 13276 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:02,243 INFO L231 Difference]: Finished difference. Result has 367 places, 629 transitions, 11988 flow [2024-06-27 21:08:02,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11853, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11988, PETRI_PLACES=367, PETRI_TRANSITIONS=629} [2024-06-27 21:08:02,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 21:08:02,243 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 629 transitions, 11988 flow [2024-06-27 21:08:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:02,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:08:02,244 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)] === [2024-06-27 21:08:02,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1683267365, now seen corresponding path program 3 times [2024-06-27 21:08:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249041527] [2024-06-27 21:08:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:02,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:04,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249041527] [2024-06-27 21:08:04,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249041527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:04,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:04,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005960450] [2024-06-27 21:08:04,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:04,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:04,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:04,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:04,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 629 transitions, 11988 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:04,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:07,478 INFO L124 PetriNetUnfolderBase]: 5973/9243 cut-off events. [2024-06-27 21:08:07,479 INFO L125 PetriNetUnfolderBase]: For 1037750/1037750 co-relation queries the response was YES. [2024-06-27 21:08:07,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92909 conditions, 9243 events. 5973/9243 cut-off events. For 1037750/1037750 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 56275 event pairs, 1339 based on Foata normal form. 2/9244 useless extension candidates. Maximal degree in co-relation 92728. Up to 9162 conditions per place. [2024-06-27 21:08:07,612 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 618 selfloop transitions, 27 changer transitions 0/648 dead transitions. [2024-06-27 21:08:07,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 648 transitions, 13344 flow [2024-06-27 21:08:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:08:07,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 21:08:07,613 INFO L175 Difference]: Start difference. First operand has 367 places, 629 transitions, 11988 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:08:07,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 648 transitions, 13344 flow [2024-06-27 21:08:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 648 transitions, 13238 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:11,171 INFO L231 Difference]: Finished difference. Result has 369 places, 629 transitions, 11952 flow [2024-06-27 21:08:11,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11882, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11952, PETRI_PLACES=369, PETRI_TRANSITIONS=629} [2024-06-27 21:08:11,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 21:08:11,171 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 629 transitions, 11952 flow [2024-06-27 21:08:11,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:11,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:11,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:11,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:08:11,172 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)] === [2024-06-27 21:08:11,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1683267551, now seen corresponding path program 2 times [2024-06-27 21:08:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419827217] [2024-06-27 21:08:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:11,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:12,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419827217] [2024-06-27 21:08:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419827217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:12,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525649001] [2024-06-27 21:08:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:12,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:12,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 629 transitions, 11952 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:12,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:12,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:12,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:15,974 INFO L124 PetriNetUnfolderBase]: 5993/9265 cut-off events. [2024-06-27 21:08:15,974 INFO L125 PetriNetUnfolderBase]: For 1064180/1064222 co-relation queries the response was YES. [2024-06-27 21:08:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93421 conditions, 9265 events. 5993/9265 cut-off events. For 1064180/1064222 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56389 event pairs, 1213 based on Foata normal form. 46/9310 useless extension candidates. Maximal degree in co-relation 93239. Up to 8980 conditions per place. [2024-06-27 21:08:16,128 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 541 selfloop transitions, 109 changer transitions 0/653 dead transitions. [2024-06-27 21:08:16,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 653 transitions, 13610 flow [2024-06-27 21:08:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:08:16,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:08:16,129 INFO L175 Difference]: Start difference. First operand has 369 places, 629 transitions, 11952 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:08:16,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 653 transitions, 13610 flow [2024-06-27 21:08:19,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 653 transitions, 13552 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:19,288 INFO L231 Difference]: Finished difference. Result has 370 places, 636 transitions, 12285 flow [2024-06-27 21:08:19,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11896, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12285, PETRI_PLACES=370, PETRI_TRANSITIONS=636} [2024-06-27 21:08:19,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 21:08:19,289 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 636 transitions, 12285 flow [2024-06-27 21:08:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:19,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:19,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:08:19,289 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)] === [2024-06-27 21:08:19,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1683504701, now seen corresponding path program 3 times [2024-06-27 21:08:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481508153] [2024-06-27 21:08:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:21,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:21,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481508153] [2024-06-27 21:08:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481508153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:21,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380895228] [2024-06-27 21:08:21,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:21,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:21,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:21,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 636 transitions, 12285 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:21,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:21,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:24,231 INFO L124 PetriNetUnfolderBase]: 5930/9171 cut-off events. [2024-06-27 21:08:24,231 INFO L125 PetriNetUnfolderBase]: For 1055712/1055777 co-relation queries the response was YES. [2024-06-27 21:08:24,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92379 conditions, 9171 events. 5930/9171 cut-off events. For 1055712/1055777 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55803 event pairs, 1240 based on Foata normal form. 61/9231 useless extension candidates. Maximal degree in co-relation 92196. Up to 8894 conditions per place. [2024-06-27 21:08:24,369 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 535 selfloop transitions, 109 changer transitions 0/647 dead transitions. [2024-06-27 21:08:24,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 647 transitions, 13611 flow [2024-06-27 21:08:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 21:08:24,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-27 21:08:24,370 INFO L175 Difference]: Start difference. First operand has 370 places, 636 transitions, 12285 flow. Second operand 6 states and 95 transitions. [2024-06-27 21:08:24,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 647 transitions, 13611 flow [2024-06-27 21:08:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 647 transitions, 13454 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:28,145 INFO L231 Difference]: Finished difference. Result has 373 places, 636 transitions, 12361 flow [2024-06-27 21:08:28,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12128, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12361, PETRI_PLACES=373, PETRI_TRANSITIONS=636} [2024-06-27 21:08:28,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 21:08:28,146 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 636 transitions, 12361 flow [2024-06-27 21:08:28,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:28,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:28,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:28,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:08:28,146 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)] === [2024-06-27 21:08:28,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1683513629, now seen corresponding path program 1 times [2024-06-27 21:08:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:28,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179401261] [2024-06-27 21:08:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:30,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179401261] [2024-06-27 21:08:30,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179401261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:30,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:30,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337772368] [2024-06-27 21:08:30,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:30,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:30,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 636 transitions, 12361 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:08:30,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:30,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:30,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:33,187 INFO L124 PetriNetUnfolderBase]: 5933/9172 cut-off events. [2024-06-27 21:08:33,187 INFO L125 PetriNetUnfolderBase]: For 1042434/1042476 co-relation queries the response was YES. [2024-06-27 21:08:33,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92288 conditions, 9172 events. 5933/9172 cut-off events. For 1042434/1042476 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55705 event pairs, 1205 based on Foata normal form. 46/9217 useless extension candidates. Maximal degree in co-relation 92104. Up to 9072 conditions per place. [2024-06-27 21:08:33,354 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 614 selfloop transitions, 34 changer transitions 0/651 dead transitions. [2024-06-27 21:08:33,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 651 transitions, 13749 flow [2024-06-27 21:08:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 21:08:33,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 21:08:33,356 INFO L175 Difference]: Start difference. First operand has 373 places, 636 transitions, 12361 flow. Second operand 6 states and 92 transitions. [2024-06-27 21:08:33,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 651 transitions, 13749 flow [2024-06-27 21:08:36,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 651 transitions, 13321 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:36,237 INFO L231 Difference]: Finished difference. Result has 372 places, 639 transitions, 12070 flow [2024-06-27 21:08:36,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11933, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12070, PETRI_PLACES=372, PETRI_TRANSITIONS=639} [2024-06-27 21:08:36,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 21:08:36,238 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 639 transitions, 12070 flow [2024-06-27 21:08:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:08:36,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:36,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:36,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:08:36,239 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)] === [2024-06-27 21:08:36,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash -572394382, now seen corresponding path program 1 times [2024-06-27 21:08:36,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:36,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806989418] [2024-06-27 21:08:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:36,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806989418] [2024-06-27 21:08:37,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806989418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:37,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:37,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146525294] [2024-06-27 21:08:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:37,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:37,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 639 transitions, 12070 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:37,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:37,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:40,531 INFO L124 PetriNetUnfolderBase]: 5935/9175 cut-off events. [2024-06-27 21:08:40,531 INFO L125 PetriNetUnfolderBase]: For 1045961/1046003 co-relation queries the response was YES. [2024-06-27 21:08:40,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92417 conditions, 9175 events. 5935/9175 cut-off events. For 1045961/1046003 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55704 event pairs, 1213 based on Foata normal form. 44/9218 useless extension candidates. Maximal degree in co-relation 92233. Up to 9014 conditions per place. [2024-06-27 21:08:40,670 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 618 selfloop transitions, 51 changer transitions 0/672 dead transitions. [2024-06-27 21:08:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 672 transitions, 13904 flow [2024-06-27 21:08:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:08:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 21:08:40,671 INFO L175 Difference]: Start difference. First operand has 372 places, 639 transitions, 12070 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:08:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 672 transitions, 13904 flow [2024-06-27 21:08:43,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 672 transitions, 13798 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:43,947 INFO L231 Difference]: Finished difference. Result has 376 places, 648 transitions, 12347 flow [2024-06-27 21:08:43,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11964, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12347, PETRI_PLACES=376, PETRI_TRANSITIONS=648} [2024-06-27 21:08:43,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-27 21:08:43,948 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 648 transitions, 12347 flow [2024-06-27 21:08:43,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:43,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:43,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:43,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:08:43,948 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)] === [2024-06-27 21:08:43,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash 352933298, now seen corresponding path program 2 times [2024-06-27 21:08:43,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:43,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574984576] [2024-06-27 21:08:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:43,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:45,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574984576] [2024-06-27 21:08:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574984576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146332270] [2024-06-27 21:08:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:45,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:45,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 648 transitions, 12347 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:45,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:45,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:45,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:48,127 INFO L124 PetriNetUnfolderBase]: 5937/9178 cut-off events. [2024-06-27 21:08:48,127 INFO L125 PetriNetUnfolderBase]: For 1069982/1070022 co-relation queries the response was YES. [2024-06-27 21:08:48,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93114 conditions, 9178 events. 5937/9178 cut-off events. For 1069982/1070022 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55723 event pairs, 1213 based on Foata normal form. 42/9219 useless extension candidates. Maximal degree in co-relation 92928. Up to 9018 conditions per place. [2024-06-27 21:08:48,288 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 616 selfloop transitions, 55 changer transitions 0/674 dead transitions. [2024-06-27 21:08:48,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 674 transitions, 14043 flow [2024-06-27 21:08:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:08:48,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 21:08:48,289 INFO L175 Difference]: Start difference. First operand has 376 places, 648 transitions, 12347 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:08:48,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 674 transitions, 14043 flow [2024-06-27 21:08:52,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 674 transitions, 13883 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:52,329 INFO L231 Difference]: Finished difference. Result has 380 places, 651 transitions, 12404 flow [2024-06-27 21:08:52,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12207, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12404, PETRI_PLACES=380, PETRI_TRANSITIONS=651} [2024-06-27 21:08:52,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 21:08:52,330 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 651 transitions, 12404 flow [2024-06-27 21:08:52,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:52,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:52,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:08:52,330 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)] === [2024-06-27 21:08:52,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 352944458, now seen corresponding path program 3 times [2024-06-27 21:08:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:52,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903058154] [2024-06-27 21:08:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:53,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903058154] [2024-06-27 21:08:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903058154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:53,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:53,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:53,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783658307] [2024-06-27 21:08:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:53,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:53,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:08:53,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 651 transitions, 12404 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:53,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:53,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:08:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:56,751 INFO L124 PetriNetUnfolderBase]: 5931/9170 cut-off events. [2024-06-27 21:08:56,751 INFO L125 PetriNetUnfolderBase]: For 1085201/1085241 co-relation queries the response was YES. [2024-06-27 21:08:56,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93184 conditions, 9170 events. 5931/9170 cut-off events. For 1085201/1085241 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 55711 event pairs, 1205 based on Foata normal form. 42/9211 useless extension candidates. Maximal degree in co-relation 92996. Up to 9087 conditions per place. [2024-06-27 21:08:56,901 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 629 selfloop transitions, 31 changer transitions 0/663 dead transitions. [2024-06-27 21:08:56,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 663 transitions, 13770 flow [2024-06-27 21:08:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-27 21:08:56,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 21:08:56,902 INFO L175 Difference]: Start difference. First operand has 380 places, 651 transitions, 12404 flow. Second operand 6 states and 90 transitions. [2024-06-27 21:08:56,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 663 transitions, 13770 flow [2024-06-27 21:09:00,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 663 transitions, 13605 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:00,282 INFO L231 Difference]: Finished difference. Result has 382 places, 651 transitions, 12309 flow [2024-06-27 21:09:00,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12239, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12309, PETRI_PLACES=382, PETRI_TRANSITIONS=651} [2024-06-27 21:09:00,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 21:09:00,283 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 651 transitions, 12309 flow [2024-06-27 21:09:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:09:00,283 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)] === [2024-06-27 21:09:00,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2130818944, now seen corresponding path program 1 times [2024-06-27 21:09:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:00,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305614586] [2024-06-27 21:09:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305614586] [2024-06-27 21:09:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305614586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:02,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714155365] [2024-06-27 21:09:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:02,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:02,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:02,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 651 transitions, 12309 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:02,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:02,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:02,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:06,267 INFO L124 PetriNetUnfolderBase]: 6027/9304 cut-off events. [2024-06-27 21:09:06,267 INFO L125 PetriNetUnfolderBase]: For 1128747/1128783 co-relation queries the response was YES. [2024-06-27 21:09:06,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94923 conditions, 9304 events. 6027/9304 cut-off events. For 1128747/1128783 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 56536 event pairs, 1186 based on Foata normal form. 44/9347 useless extension candidates. Maximal degree in co-relation 94735. Up to 8645 conditions per place. [2024-06-27 21:09:06,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 131 changer transitions 0/693 dead transitions. [2024-06-27 21:09:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 693 transitions, 14509 flow [2024-06-27 21:09:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:09:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:09:06,419 INFO L175 Difference]: Start difference. First operand has 382 places, 651 transitions, 12309 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:09:06,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 693 transitions, 14509 flow [2024-06-27 21:09:09,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 693 transitions, 14394 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:09,842 INFO L231 Difference]: Finished difference. Result has 386 places, 662 transitions, 12770 flow [2024-06-27 21:09:09,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12770, PETRI_PLACES=386, PETRI_TRANSITIONS=662} [2024-06-27 21:09:09,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 21:09:09,843 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 662 transitions, 12770 flow [2024-06-27 21:09:09,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:09,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:09,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:09,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:09:09,843 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)] === [2024-06-27 21:09:09,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash -432519104, now seen corresponding path program 2 times [2024-06-27 21:09:09,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:09,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726683186] [2024-06-27 21:09:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:09,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726683186] [2024-06-27 21:09:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726683186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:12,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155479916] [2024-06-27 21:09:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:12,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 662 transitions, 12770 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:12,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:12,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:15,829 INFO L124 PetriNetUnfolderBase]: 6179/9514 cut-off events. [2024-06-27 21:09:15,829 INFO L125 PetriNetUnfolderBase]: For 1218050/1218086 co-relation queries the response was YES. [2024-06-27 21:09:15,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99615 conditions, 9514 events. 6179/9514 cut-off events. For 1218050/1218086 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 57803 event pairs, 1202 based on Foata normal form. 44/9557 useless extension candidates. Maximal degree in co-relation 99426. Up to 9086 conditions per place. [2024-06-27 21:09:15,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 120 changer transitions 0/703 dead transitions. [2024-06-27 21:09:15,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 703 transitions, 14999 flow [2024-06-27 21:09:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:09:15,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:09:15,983 INFO L175 Difference]: Start difference. First operand has 386 places, 662 transitions, 12770 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:09:15,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 703 transitions, 14999 flow [2024-06-27 21:09:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 703 transitions, 14768 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:18,693 INFO L231 Difference]: Finished difference. Result has 394 places, 674 transitions, 13134 flow [2024-06-27 21:09:18,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12557, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13134, PETRI_PLACES=394, PETRI_TRANSITIONS=674} [2024-06-27 21:09:18,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 21:09:18,694 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 674 transitions, 13134 flow [2024-06-27 21:09:18,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:18,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:18,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:18,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:09:18,694 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)] === [2024-06-27 21:09:18,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash -432524684, now seen corresponding path program 3 times [2024-06-27 21:09:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:18,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747204934] [2024-06-27 21:09:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:18,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:20,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747204934] [2024-06-27 21:09:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747204934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:20,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:20,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651269269] [2024-06-27 21:09:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:20,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:20,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:20,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 674 transitions, 13134 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:24,419 INFO L124 PetriNetUnfolderBase]: 6163/9494 cut-off events. [2024-06-27 21:09:24,419 INFO L125 PetriNetUnfolderBase]: For 1214116/1214152 co-relation queries the response was YES. [2024-06-27 21:09:24,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99125 conditions, 9494 events. 6163/9494 cut-off events. For 1214116/1214152 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 57727 event pairs, 1209 based on Foata normal form. 44/9537 useless extension candidates. Maximal degree in co-relation 98933. Up to 9082 conditions per place. [2024-06-27 21:09:24,555 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 585 selfloop transitions, 110 changer transitions 0/698 dead transitions. [2024-06-27 21:09:24,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 698 transitions, 14830 flow [2024-06-27 21:09:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:09:24,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:09:24,556 INFO L175 Difference]: Start difference. First operand has 394 places, 674 transitions, 13134 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:09:24,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 698 transitions, 14830 flow [2024-06-27 21:09:28,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 698 transitions, 14470 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:28,522 INFO L231 Difference]: Finished difference. Result has 395 places, 674 transitions, 13002 flow [2024-06-27 21:09:28,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13002, PETRI_PLACES=395, PETRI_TRANSITIONS=674} [2024-06-27 21:09:28,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 21:09:28,522 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 674 transitions, 13002 flow [2024-06-27 21:09:28,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:28,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:28,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:09:28,523 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)] === [2024-06-27 21:09:28,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 641890100, now seen corresponding path program 4 times [2024-06-27 21:09:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279437740] [2024-06-27 21:09:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:30,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:30,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279437740] [2024-06-27 21:09:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279437740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:30,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:30,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:30,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483846164] [2024-06-27 21:09:30,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:30,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:30,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:30,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:30,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 674 transitions, 13002 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:30,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:30,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:30,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:34,684 INFO L124 PetriNetUnfolderBase]: 6235/9598 cut-off events. [2024-06-27 21:09:34,684 INFO L125 PetriNetUnfolderBase]: For 1255957/1256016 co-relation queries the response was YES. [2024-06-27 21:09:34,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100194 conditions, 9598 events. 6235/9598 cut-off events. For 1255957/1256016 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58390 event pairs, 1243 based on Foata normal form. 67/9664 useless extension candidates. Maximal degree in co-relation 100002. Up to 8883 conditions per place. [2024-06-27 21:09:34,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 160 changer transitions 0/709 dead transitions. [2024-06-27 21:09:34,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 709 transitions, 15146 flow [2024-06-27 21:09:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:09:34,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:09:34,846 INFO L175 Difference]: Start difference. First operand has 395 places, 674 transitions, 13002 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:09:34,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 709 transitions, 15146 flow [2024-06-27 21:09:38,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 709 transitions, 14988 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:38,871 INFO L231 Difference]: Finished difference. Result has 399 places, 683 transitions, 13478 flow [2024-06-27 21:09:38,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12844, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13478, PETRI_PLACES=399, PETRI_TRANSITIONS=683} [2024-06-27 21:09:38,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 21:09:38,872 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 683 transitions, 13478 flow [2024-06-27 21:09:38,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:38,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:38,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:38,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:09:38,873 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)] === [2024-06-27 21:09:38,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 641682710, now seen corresponding path program 5 times [2024-06-27 21:09:38,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:38,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251502942] [2024-06-27 21:09:38,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:38,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:41,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251502942] [2024-06-27 21:09:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251502942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:41,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:41,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717271068] [2024-06-27 21:09:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:41,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:41,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 683 transitions, 13478 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:41,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:41,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:45,205 INFO L124 PetriNetUnfolderBase]: 6283/9662 cut-off events. [2024-06-27 21:09:45,205 INFO L125 PetriNetUnfolderBase]: For 1284077/1284113 co-relation queries the response was YES. [2024-06-27 21:09:45,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101854 conditions, 9662 events. 6283/9662 cut-off events. For 1284077/1284113 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 58744 event pairs, 1215 based on Foata normal form. 44/9705 useless extension candidates. Maximal degree in co-relation 101660. Up to 8915 conditions per place. [2024-06-27 21:09:45,359 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 145 changer transitions 0/712 dead transitions. [2024-06-27 21:09:45,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 712 transitions, 15299 flow [2024-06-27 21:09:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:09:45,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:09:45,360 INFO L175 Difference]: Start difference. First operand has 399 places, 683 transitions, 13478 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:09:45,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 712 transitions, 15299 flow [2024-06-27 21:09:49,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 712 transitions, 14945 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:49,209 INFO L231 Difference]: Finished difference. Result has 401 places, 687 transitions, 13538 flow [2024-06-27 21:09:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13151, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13538, PETRI_PLACES=401, PETRI_TRANSITIONS=687} [2024-06-27 21:09:49,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 21:09:49,210 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 687 transitions, 13538 flow [2024-06-27 21:09:49,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:49,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:49,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:09:49,210 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)] === [2024-06-27 21:09:49,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -329938704, now seen corresponding path program 6 times [2024-06-27 21:09:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:49,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386480165] [2024-06-27 21:09:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:51,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:51,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386480165] [2024-06-27 21:09:51,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386480165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:51,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:51,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541349241] [2024-06-27 21:09:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:51,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:09:51,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 687 transitions, 13538 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:09:51,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:51,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:09:51,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:56,055 INFO L124 PetriNetUnfolderBase]: 6259/9634 cut-off events. [2024-06-27 21:09:56,055 INFO L125 PetriNetUnfolderBase]: For 1279838/1279897 co-relation queries the response was YES. [2024-06-27 21:09:56,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101021 conditions, 9634 events. 6259/9634 cut-off events. For 1279838/1279897 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 58599 event pairs, 1226 based on Foata normal form. 57/9690 useless extension candidates. Maximal degree in co-relation 100825. Up to 9031 conditions per place. [2024-06-27 21:09:56,204 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 580 selfloop transitions, 132 changer transitions 0/715 dead transitions. [2024-06-27 21:09:56,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 715 transitions, 15511 flow [2024-06-27 21:09:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:09:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:09:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-27 21:09:56,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373015873015873 [2024-06-27 21:09:56,206 INFO L175 Difference]: Start difference. First operand has 401 places, 687 transitions, 13538 flow. Second operand 12 states and 170 transitions. [2024-06-27 21:09:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 715 transitions, 15511 flow [2024-06-27 21:10:00,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 715 transitions, 15230 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:00,620 INFO L231 Difference]: Finished difference. Result has 408 places, 687 transitions, 13533 flow [2024-06-27 21:10:00,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13261, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13533, PETRI_PLACES=408, PETRI_TRANSITIONS=687} [2024-06-27 21:10:00,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 21:10:00,621 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 687 transitions, 13533 flow [2024-06-27 21:10:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:00,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:00,621 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] [2024-06-27 21:10:00,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:10:00,621 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)] === [2024-06-27 21:10:00,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash -397196826, now seen corresponding path program 1 times [2024-06-27 21:10:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:00,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72282040] [2024-06-27 21:10:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72282040] [2024-06-27 21:10:02,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72282040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:02,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:02,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869422748] [2024-06-27 21:10:02,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:02,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:10:02,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 687 transitions, 13533 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-27 21:10:02,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:02,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:10:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:06,359 INFO L124 PetriNetUnfolderBase]: 6282/9662 cut-off events. [2024-06-27 21:10:06,484 INFO L125 PetriNetUnfolderBase]: For 1255695/1255723 co-relation queries the response was YES. [2024-06-27 21:10:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101118 conditions, 9662 events. 6282/9662 cut-off events. For 1255695/1255723 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58726 event pairs, 1234 based on Foata normal form. 30/9691 useless extension candidates. Maximal degree in co-relation 100922. Up to 9431 conditions per place. [2024-06-27 21:10:06,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 661 selfloop transitions, 69 changer transitions 0/733 dead transitions. [2024-06-27 21:10:06,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 733 transitions, 15485 flow [2024-06-27 21:10:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:10:06,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 21:10:06,630 INFO L175 Difference]: Start difference. First operand has 408 places, 687 transitions, 13533 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:10:06,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 733 transitions, 15485 flow [2024-06-27 21:10:10,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 733 transitions, 14816 flow, removed 41 selfloop flow, removed 18 redundant places. [2024-06-27 21:10:10,269 INFO L231 Difference]: Finished difference. Result has 401 places, 696 transitions, 13179 flow [2024-06-27 21:10:10,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12864, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13179, PETRI_PLACES=401, PETRI_TRANSITIONS=696} [2024-06-27 21:10:10,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 21:10:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 696 transitions, 13179 flow [2024-06-27 21:10:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-27 21:10:10,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:10,270 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] [2024-06-27 21:10:10,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:10:10,270 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)] === [2024-06-27 21:10:10,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1905528690, now seen corresponding path program 1 times [2024-06-27 21:10:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600844066] [2024-06-27 21:10:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:12,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600844066] [2024-06-27 21:10:12,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600844066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:12,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:12,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:12,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802094740] [2024-06-27 21:10:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:12,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:12,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:10:12,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 696 transitions, 13179 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:12,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:12,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:10:12,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:16,977 INFO L124 PetriNetUnfolderBase]: 6356/9766 cut-off events. [2024-06-27 21:10:16,978 INFO L125 PetriNetUnfolderBase]: For 1313603/1313621 co-relation queries the response was YES. [2024-06-27 21:10:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102360 conditions, 9766 events. 6356/9766 cut-off events. For 1313603/1313621 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 59417 event pairs, 1279 based on Foata normal form. 20/9785 useless extension candidates. Maximal degree in co-relation 102169. Up to 8882 conditions per place. [2024-06-27 21:10:17,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 170 changer transitions 0/743 dead transitions. [2024-06-27 21:10:17,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 743 transitions, 15452 flow [2024-06-27 21:10:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:10:17,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:10:17,136 INFO L175 Difference]: Start difference. First operand has 401 places, 696 transitions, 13179 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:10:17,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 743 transitions, 15452 flow [2024-06-27 21:10:21,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 743 transitions, 15252 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:21,133 INFO L231 Difference]: Finished difference. Result has 404 places, 706 transitions, 13574 flow [2024-06-27 21:10:21,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12979, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13574, PETRI_PLACES=404, PETRI_TRANSITIONS=706} [2024-06-27 21:10:21,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 21:10:21,134 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 706 transitions, 13574 flow [2024-06-27 21:10:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:21,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:21,134 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] [2024-06-27 21:10:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:10:21,134 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)] === [2024-06-27 21:10:21,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash -132371510, now seen corresponding path program 2 times [2024-06-27 21:10:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233975576] [2024-06-27 21:10:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:23,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:23,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233975576] [2024-06-27 21:10:23,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233975576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:23,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:23,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297258323] [2024-06-27 21:10:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:23,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:23,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:10:23,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 706 transitions, 13574 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:23,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:23,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:10:23,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:27,364 INFO L124 PetriNetUnfolderBase]: 6350/9756 cut-off events. [2024-06-27 21:10:27,364 INFO L125 PetriNetUnfolderBase]: For 1334703/1334721 co-relation queries the response was YES. [2024-06-27 21:10:27,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102720 conditions, 9756 events. 6350/9756 cut-off events. For 1334703/1334721 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 59267 event pairs, 1245 based on Foata normal form. 20/9775 useless extension candidates. Maximal degree in co-relation 102528. Up to 9471 conditions per place. [2024-06-27 21:10:27,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 122 changer transitions 0/731 dead transitions. [2024-06-27 21:10:27,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 731 transitions, 15115 flow [2024-06-27 21:10:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:10:27,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:10:27,523 INFO L175 Difference]: Start difference. First operand has 404 places, 706 transitions, 13574 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:10:27,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 731 transitions, 15115 flow [2024-06-27 21:10:31,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 731 transitions, 14831 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:31,755 INFO L231 Difference]: Finished difference. Result has 408 places, 706 transitions, 13543 flow [2024-06-27 21:10:31,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13290, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13543, PETRI_PLACES=408, PETRI_TRANSITIONS=706} [2024-06-27 21:10:31,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 21:10:31,755 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 706 transitions, 13543 flow [2024-06-27 21:10:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:31,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:31,755 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] [2024-06-27 21:10:31,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:10:31,756 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)] === [2024-06-27 21:10:31,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -130740316, now seen corresponding path program 3 times [2024-06-27 21:10:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:31,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092946800] [2024-06-27 21:10:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092946800] [2024-06-27 21:10:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092946800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592107625] [2024-06-27 21:10:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:33,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-27 21:10:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 706 transitions, 13543 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-27 21:10:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:33,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-27 21:10:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:37,885 INFO L124 PetriNetUnfolderBase]: 6391/9814 cut-off events. [2024-06-27 21:10:37,885 INFO L125 PetriNetUnfolderBase]: For 1370689/1370713 co-relation queries the response was YES. [2024-06-27 21:10:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103458 conditions, 9814 events. 6391/9814 cut-off events. For 1370689/1370713 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 59690 event pairs, 1242 based on Foata normal form. 23/9836 useless extension candidates. Maximal degree in co-relation 103265. Up to 9496 conditions per place. [2024-06-27 21:10:38,044 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 135 changer transitions 0/744 dead transitions. [2024-06-27 21:10:38,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 744 transitions, 15681 flow [2024-06-27 21:10:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:10:38,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-27 21:10:38,046 INFO L175 Difference]: Start difference. First operand has 408 places, 706 transitions, 13543 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:10:38,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 744 transitions, 15681 flow