./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.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/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:52:19,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:52:19,542 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:52:19,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:52:19,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:52:19,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:52:19,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:52:19,576 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:52:19,576 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:52:19,579 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:52:19,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:52:19,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:52:19,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:52:19,582 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:52:19,582 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:52:19,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:52:19,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:52:19,583 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:52:19,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:52:19,583 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:52:19,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:52:19,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:52:19,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:52:19,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:52:19,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:52:19,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:52:19,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:52:19,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:52:19,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:52:19,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:52:19,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:52:19,588 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:52:19,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:52:19,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:52:19,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:52:19,864 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:52:19,864 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:52:19,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 18:52:20,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:52:20,077 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:52:20,077 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-27 18:52:21,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:52:21,387 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:52:21,387 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-27 18:52:21,403 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934c1f77c/cc585a10372f4d6baca531d0c903739a/FLAGb9013ce28 [2024-06-27 18:52:21,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934c1f77c/cc585a10372f4d6baca531d0c903739a [2024-06-27 18:52:21,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:52:21,414 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:52:21,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:52:21,415 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:52:21,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:52:21,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:20" (1/2) ... [2024-06-27 18:52:21,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55200a27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:21, skipping insertion in model container [2024-06-27 18:52:21,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:20" (1/2) ... [2024-06-27 18:52:21,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f39d711 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:21, skipping insertion in model container [2024-06-27 18:52:21,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:52:21" (2/2) ... [2024-06-27 18:52:21,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55200a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:21, skipping insertion in model container [2024-06-27 18:52:21,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:52:21" (2/2) ... [2024-06-27 18:52:21,422 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:52:21,540 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:52:21,542 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:52:21,542 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:52:21,542 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:52:21,542 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:52:21,542 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 18:52:21,580 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:52:21,735 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i[1026,1039] [2024-06-27 18:52:21,946 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:52:21,956 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:52:21,986 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i[1026,1039] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:52:22,074 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:52:22,129 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:52:22,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22 WrapperNode [2024-06-27 18:52:22,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:52:22,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:52:22,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:52:22,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:52:22,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,196 INFO L138 Inliner]: procedures = 175, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 171 [2024-06-27 18:52:22,197 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:52:22,197 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:52:22,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:52:22,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:52:22,206 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,211 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,234 INFO L175 MemorySlicer]: Split 27 memory accesses to 2 slices as follows [2, 25]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 18:52:22,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:52:22,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:52:22,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:52:22,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:52:22,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (1/1) ... [2024-06-27 18:52:22,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:52:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:52:22,287 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 18:52:22,297 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 18:52:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:52:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:52:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:52:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:52:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:52:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:52:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:52:22,322 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:52:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:52:22,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:52:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:52:22,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:52:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:52:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:52:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:52:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:52:22,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:52:22,327 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 18:52:22,438 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:52:22,440 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:52:22,780 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:52:22,780 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:52:23,012 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:52:23,013 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:52:23,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:52:23 BoogieIcfgContainer [2024-06-27 18:52:23,014 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:52:23,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:52:23,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:52:23,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:52:23,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:20" (1/4) ... [2024-06-27 18:52:23,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733cdc59 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:52:23, skipping insertion in model container [2024-06-27 18:52:23,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:52:21" (2/4) ... [2024-06-27 18:52:23,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733cdc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:52:23, skipping insertion in model container [2024-06-27 18:52:23,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:22" (3/4) ... [2024-06-27 18:52:23,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733cdc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:52:23, skipping insertion in model container [2024-06-27 18:52:23,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:52:23" (4/4) ... [2024-06-27 18:52:23,020 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-27 18:52:23,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:52:23,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:52:23,033 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:52:23,080 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:52:23,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:52:23,143 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:52:23,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:52:23,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:52:23,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:52:23,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:52:23,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:52:23,217 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;@2267b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:52:23,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:52:23,221 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:52:23,221 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:52:23,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:52:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:23,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:52:23,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:23,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash 562947262, now seen corresponding path program 1 times [2024-06-27 18:52:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977094787] [2024-06-27 18:52:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:25,100 INFO 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 18:52:25,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977094787] [2024-06-27 18:52:25,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977094787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:25,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:52:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718255111] [2024-06-27 18:52:25,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:52:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:25,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:52:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:52:25,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:52:25,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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 18:52:25,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:25,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:52:25,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:25,761 INFO L124 PetriNetUnfolderBase]: 2185/3482 cut-off events. [2024-06-27 18:52:25,762 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 18:52:25,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6747 conditions, 3482 events. 2185/3482 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19865 event pairs, 1368 based on Foata normal form. 0/3349 useless extension candidates. Maximal degree in co-relation 6735. Up to 3194 conditions per place. [2024-06-27 18:52:25,779 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:52:25,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-27 18:52:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:52:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:52:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 18:52:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 18:52:25,790 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-27 18:52:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-27 18:52:25,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:52:25,794 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:52:25,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:52:25,797 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:52:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:52:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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 18:52:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:52:25,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -173536579, now seen corresponding path program 1 times [2024-06-27 18:52:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625503572] [2024-06-27 18:52:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:27,936 INFO 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 18:52:27,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625503572] [2024-06-27 18:52:27,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625503572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:27,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:27,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:52:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113921171] [2024-06-27 18:52:27,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:52:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:52:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:52:27,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:52:27,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 18:52:27,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:27,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:52:27,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:28,672 INFO L124 PetriNetUnfolderBase]: 2179/3321 cut-off events. [2024-06-27 18:52:28,673 INFO L125 PetriNetUnfolderBase]: For 586/593 co-relation queries the response was YES. [2024-06-27 18:52:28,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7453 conditions, 3321 events. 2179/3321 cut-off events. For 586/593 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17971 event pairs, 984 based on Foata normal form. 7/3324 useless extension candidates. Maximal degree in co-relation 7441. Up to 3152 conditions per place. [2024-06-27 18:52:28,690 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:52:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-27 18:52:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:52:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:52:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 18:52:28,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 18:52:28,692 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-27 18:52:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-27 18:52:28,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:52:28,695 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:52:28,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:52:28,695 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:52:28,696 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:52:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 18:52:28,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:28,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:52:28,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:28,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1084665844, now seen corresponding path program 1 times [2024-06-27 18:52:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:28,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037277314] [2024-06-27 18:52:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:30,859 INFO 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 18:52:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:30,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037277314] [2024-06-27 18:52:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037277314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:52:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963854310] [2024-06-27 18:52:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:30,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:52:30,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:52:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:52:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:52:30,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 18:52:30,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:30,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:52:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:31,831 INFO L124 PetriNetUnfolderBase]: 2768/4163 cut-off events. [2024-06-27 18:52:31,832 INFO L125 PetriNetUnfolderBase]: For 2224/2232 co-relation queries the response was YES. [2024-06-27 18:52:31,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10467 conditions, 4163 events. 2768/4163 cut-off events. For 2224/2232 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22420 event pairs, 944 based on Foata normal form. 9/4169 useless extension candidates. Maximal degree in co-relation 10452. Up to 3953 conditions per place. [2024-06-27 18:52:31,852 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 86 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2024-06-27 18:52:31,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 107 transitions, 548 flow [2024-06-27 18:52:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:52:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:52:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 18:52:31,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6553191489361702 [2024-06-27 18:52:31,854 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 5 states and 154 transitions. [2024-06-27 18:52:31,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 107 transitions, 548 flow [2024-06-27 18:52:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 107 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:52:31,866 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 307 flow [2024-06-27 18:52:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 18:52:31,867 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-06-27 18:52:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 307 flow [2024-06-27 18:52:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 18:52:31,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:31,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:31,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:52:31,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:31,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1313203755, now seen corresponding path program 1 times [2024-06-27 18:52:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:31,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742416143] [2024-06-27 18:52:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:52:34,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742416143] [2024-06-27 18:52:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742416143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:34,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:34,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:52:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204432526] [2024-06-27 18:52:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:52:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:52:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:52:34,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:52:34,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:34,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:34,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:52:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:35,492 INFO L124 PetriNetUnfolderBase]: 2759/4148 cut-off events. [2024-06-27 18:52:35,492 INFO L125 PetriNetUnfolderBase]: For 3465/3489 co-relation queries the response was YES. [2024-06-27 18:52:35,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11436 conditions, 4148 events. 2759/4148 cut-off events. For 3465/3489 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22412 event pairs, 627 based on Foata normal form. 21/4166 useless extension candidates. Maximal degree in co-relation 11416. Up to 3876 conditions per place. [2024-06-27 18:52:35,517 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 97 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-06-27 18:52:35,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 120 transitions, 669 flow [2024-06-27 18:52:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:52:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:52:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:52:35,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:52:35,519 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 307 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:52:35,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 120 transitions, 669 flow [2024-06-27 18:52:35,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 667 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 18:52:35,524 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 348 flow [2024-06-27 18:52:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 18:52:35,525 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 18:52:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 348 flow [2024-06-27 18:52:35,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:52:35,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:35,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1864808899, now seen corresponding path program 1 times [2024-06-27 18:52:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31637418] [2024-06-27 18:52:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:37,078 INFO 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 18:52:37,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:37,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31637418] [2024-06-27 18:52:37,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31637418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:37,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:37,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:52:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570389047] [2024-06-27 18:52:37,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:52:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:52:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:52:37,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:52:37,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 18:52:37,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:37,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:52:37,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:38,140 INFO L124 PetriNetUnfolderBase]: 3294/5136 cut-off events. [2024-06-27 18:52:38,140 INFO L125 PetriNetUnfolderBase]: For 5850/5850 co-relation queries the response was YES. [2024-06-27 18:52:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14429 conditions, 5136 events. 3294/5136 cut-off events. For 5850/5850 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29325 event pairs, 1296 based on Foata normal form. 2/5136 useless extension candidates. Maximal degree in co-relation 14405. Up to 4715 conditions per place. [2024-06-27 18:52:38,175 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 77 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 18:52:38,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 632 flow [2024-06-27 18:52:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:52:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:52:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:52:38,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:52:38,179 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 348 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:52:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 632 flow [2024-06-27 18:52:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 597 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:52:38,189 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 419 flow [2024-06-27 18:52:38,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 18:52:38,191 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-06-27 18:52:38,191 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 419 flow [2024-06-27 18:52:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 18:52:38,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:38,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:52:38,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:38,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:38,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1257433278, now seen corresponding path program 1 times [2024-06-27 18:52:38,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220522430] [2024-06-27 18:52:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:40,868 INFO 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 18:52:40,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220522430] [2024-06-27 18:52:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220522430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:52:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394208498] [2024-06-27 18:52:40,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:40,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:52:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:52:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:52:40,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:52:40,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 419 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:40,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:40,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:52:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:42,462 INFO L124 PetriNetUnfolderBase]: 3201/4834 cut-off events. [2024-06-27 18:52:42,462 INFO L125 PetriNetUnfolderBase]: For 8554/8672 co-relation queries the response was YES. [2024-06-27 18:52:42,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15258 conditions, 4834 events. 3201/4834 cut-off events. For 8554/8672 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26942 event pairs, 864 based on Foata normal form. 32/4848 useless extension candidates. Maximal degree in co-relation 15231. Up to 4391 conditions per place. [2024-06-27 18:52:42,488 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 29 changer transitions 0/135 dead transitions. [2024-06-27 18:52:42,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 135 transitions, 869 flow [2024-06-27 18:52:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:52:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:52:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 18:52:42,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805471124620061 [2024-06-27 18:52:42,491 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 419 flow. Second operand 7 states and 191 transitions. [2024-06-27 18:52:42,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 135 transitions, 869 flow [2024-06-27 18:52:42,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 861 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:52:42,499 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 523 flow [2024-06-27 18:52:42,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 18:52:42,502 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2024-06-27 18:52:42,502 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 523 flow [2024-06-27 18:52:42,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:42,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:42,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:42,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:52:42,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:42,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1257313122, now seen corresponding path program 1 times [2024-06-27 18:52:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:42,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962986679] [2024-06-27 18:52:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:45,183 INFO 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 18:52:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962986679] [2024-06-27 18:52:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962986679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:45,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:45,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:52:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424125146] [2024-06-27 18:52:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:45,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:52:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:52:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:52:45,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:52:45,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 523 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:45,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:45,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:52:45,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:46,665 INFO L124 PetriNetUnfolderBase]: 3410/5081 cut-off events. [2024-06-27 18:52:46,666 INFO L125 PetriNetUnfolderBase]: For 10593/10593 co-relation queries the response was YES. [2024-06-27 18:52:46,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 5081 events. 3410/5081 cut-off events. For 10593/10593 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27555 event pairs, 960 based on Foata normal form. 2/5080 useless extension candidates. Maximal degree in co-relation 16808. Up to 4728 conditions per place. [2024-06-27 18:52:46,699 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 119 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-06-27 18:52:46,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 151 transitions, 1101 flow [2024-06-27 18:52:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:52:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:52:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:52:46,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:52:46,701 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 523 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:52:46,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 151 transitions, 1101 flow [2024-06-27 18:52:46,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 151 transitions, 1027 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:52:46,714 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 672 flow [2024-06-27 18:52:46,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-27 18:52:46,714 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 18:52:46,714 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 672 flow [2024-06-27 18:52:46,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:46,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:46,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:52:46,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:46,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 479538676, now seen corresponding path program 2 times [2024-06-27 18:52:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001174748] [2024-06-27 18:52:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:52:49,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001174748] [2024-06-27 18:52:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001174748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:49,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:52:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778405014] [2024-06-27 18:52:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:52:49,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:52:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:52:49,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:52:49,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 672 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:49,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:49,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:52:49,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:50,931 INFO L124 PetriNetUnfolderBase]: 3191/4870 cut-off events. [2024-06-27 18:52:50,931 INFO L125 PetriNetUnfolderBase]: For 13174/13458 co-relation queries the response was YES. [2024-06-27 18:52:50,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 4870 events. 3191/4870 cut-off events. For 13174/13458 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27775 event pairs, 797 based on Foata normal form. 48/4819 useless extension candidates. Maximal degree in co-relation 17080. Up to 4389 conditions per place. [2024-06-27 18:52:50,962 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 104 selfloop transitions, 34 changer transitions 0/152 dead transitions. [2024-06-27 18:52:50,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 152 transitions, 1123 flow [2024-06-27 18:52:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:52:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:52:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:52:50,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-06-27 18:52:50,964 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 672 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:52:50,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 152 transitions, 1123 flow [2024-06-27 18:52:50,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1109 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 18:52:50,977 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 790 flow [2024-06-27 18:52:50,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2024-06-27 18:52:50,978 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2024-06-27 18:52:50,978 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 790 flow [2024-06-27 18:52:50,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:50,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:50,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:50,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:52:50,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:50,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1525255620, now seen corresponding path program 2 times [2024-06-27 18:52:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117977498] [2024-06-27 18:52:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:50,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:53,407 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 18:52:53,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:53,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117977498] [2024-06-27 18:52:53,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117977498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:53,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:53,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:52:53,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544281026] [2024-06-27 18:52:53,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:53,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:52:53,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:53,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:52:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:52:53,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:52:53,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:53,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:53,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:52:53,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:54,648 INFO L124 PetriNetUnfolderBase]: 3518/5255 cut-off events. [2024-06-27 18:52:54,649 INFO L125 PetriNetUnfolderBase]: For 14339/14339 co-relation queries the response was YES. [2024-06-27 18:52:54,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 conditions, 5255 events. 3518/5255 cut-off events. For 14339/14339 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28635 event pairs, 962 based on Foata normal form. 2/5254 useless extension candidates. Maximal degree in co-relation 18656. Up to 4865 conditions per place. [2024-06-27 18:52:54,739 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 114 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-06-27 18:52:54,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1252 flow [2024-06-27 18:52:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:52:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:52:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:52:54,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:52:54,741 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 790 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:52:54,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1252 flow [2024-06-27 18:52:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1175 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:52:54,753 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 830 flow [2024-06-27 18:52:54,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=830, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-27 18:52:54,755 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 39 predicate places. [2024-06-27 18:52:54,755 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 830 flow [2024-06-27 18:52:54,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:54,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:54,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:52:54,755 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:54,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1525018470, now seen corresponding path program 3 times [2024-06-27 18:52:54,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342983106] [2024-06-27 18:52:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:56,983 INFO 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 18:52:56,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342983106] [2024-06-27 18:52:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342983106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:52:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072116392] [2024-06-27 18:52:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:56,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:52:56,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:56,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:52:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:52:57,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:52:57,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:57,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:57,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:52:57,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:58,222 INFO L124 PetriNetUnfolderBase]: 3513/5257 cut-off events. [2024-06-27 18:52:58,223 INFO L125 PetriNetUnfolderBase]: For 16168/16190 co-relation queries the response was YES. [2024-06-27 18:52:58,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18954 conditions, 5257 events. 3513/5257 cut-off events. For 16168/16190 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28800 event pairs, 984 based on Foata normal form. 22/5276 useless extension candidates. Maximal degree in co-relation 18915. Up to 4860 conditions per place. [2024-06-27 18:52:58,256 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 111 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-27 18:52:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 1231 flow [2024-06-27 18:52:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:52:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:52:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:52:58,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:52:58,258 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 830 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:52:58,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 1231 flow [2024-06-27 18:52:58,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 146 transitions, 1185 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:52:58,275 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 887 flow [2024-06-27 18:52:58,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=887, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2024-06-27 18:52:58,276 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2024-06-27 18:52:58,276 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 887 flow [2024-06-27 18:52:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:52:58,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:58,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:52:58,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:52:58,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1525255806, now seen corresponding path program 3 times [2024-06-27 18:52:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417689251] [2024-06-27 18:52:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:00,720 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 18:53:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417689251] [2024-06-27 18:53:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417689251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:00,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649623769] [2024-06-27 18:53:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:00,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:53:00,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:00,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:00,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:53:00,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:02,179 INFO L124 PetriNetUnfolderBase]: 3205/4898 cut-off events. [2024-06-27 18:53:02,180 INFO L125 PetriNetUnfolderBase]: For 16207/16380 co-relation queries the response was YES. [2024-06-27 18:53:02,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 4898 events. 3205/4898 cut-off events. For 16207/16380 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27956 event pairs, 800 based on Foata normal form. 58/4859 useless extension candidates. Maximal degree in co-relation 17909. Up to 4322 conditions per place. [2024-06-27 18:53:02,208 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 95 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-06-27 18:53:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 152 transitions, 1265 flow [2024-06-27 18:53:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 18:53:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780141843971631 [2024-06-27 18:53:02,210 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 887 flow. Second operand 6 states and 163 transitions. [2024-06-27 18:53:02,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 152 transitions, 1265 flow [2024-06-27 18:53:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1236 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:02,231 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 957 flow [2024-06-27 18:53:02,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=957, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-27 18:53:02,232 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-27 18:53:02,232 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 957 flow [2024-06-27 18:53:02,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:02,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:02,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:02,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:53:02,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:02,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1525009542, now seen corresponding path program 1 times [2024-06-27 18:53:02,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:02,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008286187] [2024-06-27 18:53:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:02,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:04,110 INFO 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 18:53:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008286187] [2024-06-27 18:53:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008286187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:04,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715812441] [2024-06-27 18:53:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:04,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:04,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:04,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 957 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:53:04,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:04,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:05,342 INFO L124 PetriNetUnfolderBase]: 3497/5460 cut-off events. [2024-06-27 18:53:05,342 INFO L125 PetriNetUnfolderBase]: For 18619/18621 co-relation queries the response was YES. [2024-06-27 18:53:05,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19615 conditions, 5460 events. 3497/5460 cut-off events. For 18619/18621 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 31422 event pairs, 1137 based on Foata normal form. 6/5464 useless extension candidates. Maximal degree in co-relation 19573. Up to 4955 conditions per place. [2024-06-27 18:53:05,378 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 123 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-06-27 18:53:05,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 144 transitions, 1328 flow [2024-06-27 18:53:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:53:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:53:05,380 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 957 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:53:05,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 144 transitions, 1328 flow [2024-06-27 18:53:05,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1244 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 18:53:05,403 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 935 flow [2024-06-27 18:53:05,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=935, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-06-27 18:53:05,403 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 47 predicate places. [2024-06-27 18:53:05,403 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 935 flow [2024-06-27 18:53:05,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:53:05,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:05,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:05,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:53:05,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:05,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1977079653, now seen corresponding path program 1 times [2024-06-27 18:53:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226891739] [2024-06-27 18:53:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:08,301 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 18:53:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226891739] [2024-06-27 18:53:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226891739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:08,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:08,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039698040] [2024-06-27 18:53:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:08,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:08,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:08,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 935 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:08,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:08,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:08,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:10,110 INFO L124 PetriNetUnfolderBase]: 3528/5278 cut-off events. [2024-06-27 18:53:10,110 INFO L125 PetriNetUnfolderBase]: For 18951/18951 co-relation queries the response was YES. [2024-06-27 18:53:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19864 conditions, 5278 events. 3528/5278 cut-off events. For 18951/18951 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28869 event pairs, 879 based on Foata normal form. 2/5277 useless extension candidates. Maximal degree in co-relation 19821. Up to 4684 conditions per place. [2024-06-27 18:53:10,142 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 147 selfloop transitions, 41 changer transitions 0/195 dead transitions. [2024-06-27 18:53:10,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 195 transitions, 1639 flow [2024-06-27 18:53:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:53:10,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-27 18:53:10,144 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 935 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:53:10,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 195 transitions, 1639 flow [2024-06-27 18:53:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 195 transitions, 1601 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:53:10,166 INFO L231 Difference]: Finished difference. Result has 104 places, 124 transitions, 1111 flow [2024-06-27 18:53:10,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1111, PETRI_PLACES=104, PETRI_TRANSITIONS=124} [2024-06-27 18:53:10,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 18:53:10,167 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 124 transitions, 1111 flow [2024-06-27 18:53:10,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:10,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:10,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:53:10,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:10,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1954738699, now seen corresponding path program 2 times [2024-06-27 18:53:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595566702] [2024-06-27 18:53:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:13,265 INFO 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 18:53:13,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:13,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595566702] [2024-06-27 18:53:13,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595566702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:13,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:13,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:13,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347529248] [2024-06-27 18:53:13,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:13,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:13,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:13,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:13,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 124 transitions, 1111 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:13,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:13,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:15,189 INFO L124 PetriNetUnfolderBase]: 3595/5393 cut-off events. [2024-06-27 18:53:15,189 INFO L125 PetriNetUnfolderBase]: For 22817/22817 co-relation queries the response was YES. [2024-06-27 18:53:15,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21585 conditions, 5393 events. 3595/5393 cut-off events. For 22817/22817 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29647 event pairs, 875 based on Foata normal form. 2/5392 useless extension candidates. Maximal degree in co-relation 21539. Up to 4902 conditions per place. [2024-06-27 18:53:15,227 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 173 selfloop transitions, 39 changer transitions 0/219 dead transitions. [2024-06-27 18:53:15,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 219 transitions, 1882 flow [2024-06-27 18:53:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:53:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:53:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:53:15,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468085106382978 [2024-06-27 18:53:15,229 INFO L175 Difference]: Start difference. First operand has 104 places, 124 transitions, 1111 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:53:15,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 219 transitions, 1882 flow [2024-06-27 18:53:15,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 219 transitions, 1823 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:15,264 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 1222 flow [2024-06-27 18:53:15,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1222, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2024-06-27 18:53:15,264 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 61 predicate places. [2024-06-27 18:53:15,264 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 1222 flow [2024-06-27 18:53:15,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:15,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:15,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:15,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:53:15,265 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:15,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1980798723, now seen corresponding path program 3 times [2024-06-27 18:53:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470474124] [2024-06-27 18:53:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:17,937 INFO 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 18:53:17,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:17,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470474124] [2024-06-27 18:53:17,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470474124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:17,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:17,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:17,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81218563] [2024-06-27 18:53:17,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:17,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:17,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:17,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:17,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:17,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:17,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:17,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:19,461 INFO L124 PetriNetUnfolderBase]: 3590/5386 cut-off events. [2024-06-27 18:53:19,461 INFO L125 PetriNetUnfolderBase]: For 24378/24378 co-relation queries the response was YES. [2024-06-27 18:53:19,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21977 conditions, 5386 events. 3590/5386 cut-off events. For 24378/24378 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29565 event pairs, 875 based on Foata normal form. 2/5385 useless extension candidates. Maximal degree in co-relation 21928. Up to 4897 conditions per place. [2024-06-27 18:53:19,496 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 150 selfloop transitions, 38 changer transitions 0/195 dead transitions. [2024-06-27 18:53:19,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1765 flow [2024-06-27 18:53:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:53:19,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:53:19,507 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 1222 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:53:19,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1765 flow [2024-06-27 18:53:19,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1718 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:53:19,544 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 1259 flow [2024-06-27 18:53:19,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-27 18:53:19,545 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:53:19,546 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 1259 flow [2024-06-27 18:53:19,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:19,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:19,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:19,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:53:19,546 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:19,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1679822625, now seen corresponding path program 4 times [2024-06-27 18:53:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:19,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092909155] [2024-06-27 18:53:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092909155] [2024-06-27 18:53:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092909155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:22,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725288924] [2024-06-27 18:53:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:22,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:22,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:22,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:22,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:22,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:24,252 INFO L124 PetriNetUnfolderBase]: 3621/5452 cut-off events. [2024-06-27 18:53:24,252 INFO L125 PetriNetUnfolderBase]: For 27830/27855 co-relation queries the response was YES. [2024-06-27 18:53:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22640 conditions, 5452 events. 3621/5452 cut-off events. For 27830/27855 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30238 event pairs, 897 based on Foata normal form. 24/5473 useless extension candidates. Maximal degree in co-relation 22589. Up to 4826 conditions per place. [2024-06-27 18:53:24,289 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 159 selfloop transitions, 48 changer transitions 0/214 dead transitions. [2024-06-27 18:53:24,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 214 transitions, 1981 flow [2024-06-27 18:53:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:53:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:53:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:53:24,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:53:24,291 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 1259 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:53:24,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 214 transitions, 1981 flow [2024-06-27 18:53:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 214 transitions, 1905 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:53:24,324 INFO L231 Difference]: Finished difference. Result has 118 places, 137 transitions, 1347 flow [2024-06-27 18:53:24,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=118, PETRI_TRANSITIONS=137} [2024-06-27 18:53:24,325 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-27 18:53:24,325 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 137 transitions, 1347 flow [2024-06-27 18:53:24,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:24,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:24,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:53:24,325 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:24,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash -38282495, now seen corresponding path program 5 times [2024-06-27 18:53:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839738810] [2024-06-27 18:53:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:26,924 INFO 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 18:53:26,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839738810] [2024-06-27 18:53:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839738810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:26,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:26,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408303588] [2024-06-27 18:53:26,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:26,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:26,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 137 transitions, 1347 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:26,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:29,107 INFO L124 PetriNetUnfolderBase]: 3652/5498 cut-off events. [2024-06-27 18:53:29,107 INFO L125 PetriNetUnfolderBase]: For 29163/29163 co-relation queries the response was YES. [2024-06-27 18:53:29,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23324 conditions, 5498 events. 3652/5498 cut-off events. For 29163/29163 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30421 event pairs, 875 based on Foata normal form. 2/5497 useless extension candidates. Maximal degree in co-relation 23271. Up to 4858 conditions per place. [2024-06-27 18:53:29,144 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 160 selfloop transitions, 53 changer transitions 0/220 dead transitions. [2024-06-27 18:53:29,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 220 transitions, 2075 flow [2024-06-27 18:53:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:53:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:53:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:53:29,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:53:29,146 INFO L175 Difference]: Start difference. First operand has 118 places, 137 transitions, 1347 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:53:29,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 220 transitions, 2075 flow [2024-06-27 18:53:29,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 1963 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:53:29,187 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1388 flow [2024-06-27 18:53:29,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1388, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-27 18:53:29,188 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-27 18:53:29,188 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1388 flow [2024-06-27 18:53:29,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:29,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:29,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:29,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:53:29,188 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:29,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash -38288075, now seen corresponding path program 6 times [2024-06-27 18:53:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:29,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634925991] [2024-06-27 18:53:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:32,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:32,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634925991] [2024-06-27 18:53:32,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634925991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:32,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:32,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614237817] [2024-06-27 18:53:32,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:32,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:32,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:32,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1388 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:32,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:32,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:32,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:33,802 INFO L124 PetriNetUnfolderBase]: 3647/5491 cut-off events. [2024-06-27 18:53:33,802 INFO L125 PetriNetUnfolderBase]: For 30903/30903 co-relation queries the response was YES. [2024-06-27 18:53:33,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 5491 events. 3647/5491 cut-off events. For 30903/30903 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30346 event pairs, 879 based on Foata normal form. 2/5490 useless extension candidates. Maximal degree in co-relation 23367. Up to 4853 conditions per place. [2024-06-27 18:53:33,836 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 138 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-27 18:53:33,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 1913 flow [2024-06-27 18:53:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:53:33,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-27 18:53:33,837 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1388 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:53:33,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 1913 flow [2024-06-27 18:53:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 196 transitions, 1795 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 18:53:33,878 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1384 flow [2024-06-27 18:53:33,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1384, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-27 18:53:33,879 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 69 predicate places. [2024-06-27 18:53:33,879 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1384 flow [2024-06-27 18:53:33,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:33,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:33,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:33,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:53:33,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:33,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1510378911, now seen corresponding path program 1 times [2024-06-27 18:53:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844414399] [2024-06-27 18:53:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:33,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:36,938 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 18:53:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844414399] [2024-06-27 18:53:36,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844414399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:36,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:36,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126483010] [2024-06-27 18:53:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:36,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:37,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:53:37,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1384 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:53:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:38,618 INFO L124 PetriNetUnfolderBase]: 3526/5397 cut-off events. [2024-06-27 18:53:38,618 INFO L125 PetriNetUnfolderBase]: For 34137/34205 co-relation queries the response was YES. [2024-06-27 18:53:38,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23203 conditions, 5397 events. 3526/5397 cut-off events. For 34137/34205 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30974 event pairs, 436 based on Foata normal form. 22/5289 useless extension candidates. Maximal degree in co-relation 23149. Up to 4396 conditions per place. [2024-06-27 18:53:38,653 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 132 selfloop transitions, 55 changer transitions 0/214 dead transitions. [2024-06-27 18:53:38,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 214 transitions, 2030 flow [2024-06-27 18:53:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:53:38,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-06-27 18:53:38,655 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1384 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:53:38,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 214 transitions, 2030 flow [2024-06-27 18:53:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 214 transitions, 1916 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:53:38,695 INFO L231 Difference]: Finished difference. Result has 121 places, 144 transitions, 1427 flow [2024-06-27 18:53:38,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1427, PETRI_PLACES=121, PETRI_TRANSITIONS=144} [2024-06-27 18:53:38,696 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-27 18:53:38,696 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 144 transitions, 1427 flow [2024-06-27 18:53:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:38,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:38,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:38,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:53:38,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:38,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1507521951, now seen corresponding path program 2 times [2024-06-27 18:53:38,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:38,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884454329] [2024-06-27 18:53:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:42,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:42,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884454329] [2024-06-27 18:53:42,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884454329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:42,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:42,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666406700] [2024-06-27 18:53:42,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:42,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:42,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:53:42,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 144 transitions, 1427 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:42,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:42,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:53:42,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:43,759 INFO L124 PetriNetUnfolderBase]: 3579/5488 cut-off events. [2024-06-27 18:53:43,759 INFO L125 PetriNetUnfolderBase]: For 36661/36754 co-relation queries the response was YES. [2024-06-27 18:53:43,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24028 conditions, 5488 events. 3579/5488 cut-off events. For 36661/36754 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31638 event pairs, 681 based on Foata normal form. 14/5362 useless extension candidates. Maximal degree in co-relation 23974. Up to 4663 conditions per place. [2024-06-27 18:53:43,794 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 133 selfloop transitions, 53 changer transitions 0/213 dead transitions. [2024-06-27 18:53:43,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 213 transitions, 1993 flow [2024-06-27 18:53:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:53:43,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718085106382979 [2024-06-27 18:53:43,795 INFO L175 Difference]: Start difference. First operand has 121 places, 144 transitions, 1427 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:53:43,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 213 transitions, 1993 flow [2024-06-27 18:53:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 1913 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:53:43,838 INFO L231 Difference]: Finished difference. Result has 125 places, 146 transitions, 1485 flow [2024-06-27 18:53:43,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=125, PETRI_TRANSITIONS=146} [2024-06-27 18:53:43,838 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-06-27 18:53:43,838 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 146 transitions, 1485 flow [2024-06-27 18:53:43,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:43,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:43,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:53:43,839 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:43,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1392230781, now seen corresponding path program 3 times [2024-06-27 18:53:43,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:43,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846824479] [2024-06-27 18:53:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:46,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846824479] [2024-06-27 18:53:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846824479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:46,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628905928] [2024-06-27 18:53:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:46,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:46,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:53:46,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 146 transitions, 1485 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:46,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:46,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:53:46,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:48,572 INFO L124 PetriNetUnfolderBase]: 3629/5570 cut-off events. [2024-06-27 18:53:48,573 INFO L125 PetriNetUnfolderBase]: For 39298/39387 co-relation queries the response was YES. [2024-06-27 18:53:48,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24783 conditions, 5570 events. 3629/5570 cut-off events. For 39298/39387 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32300 event pairs, 678 based on Foata normal form. 14/5438 useless extension candidates. Maximal degree in co-relation 24727. Up to 4848 conditions per place. [2024-06-27 18:53:48,609 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 144 selfloop transitions, 40 changer transitions 0/211 dead transitions. [2024-06-27 18:53:48,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 2037 flow [2024-06-27 18:53:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:53:48,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:53:48,610 INFO L175 Difference]: Start difference. First operand has 125 places, 146 transitions, 1485 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:53:48,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 2037 flow [2024-06-27 18:53:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 211 transitions, 1931 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:53:48,664 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1491 flow [2024-06-27 18:53:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-27 18:53:48,664 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 76 predicate places. [2024-06-27 18:53:48,664 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1491 flow [2024-06-27 18:53:48,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:48,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:48,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:53:48,665 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:48,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1392046083, now seen corresponding path program 1 times [2024-06-27 18:53:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814658357] [2024-06-27 18:53:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:51,518 INFO 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 18:53:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814658357] [2024-06-27 18:53:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814658357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:51,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:51,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900805999] [2024-06-27 18:53:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:51,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:51,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:53:51,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:51,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:51,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:53:51,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:53,394 INFO L124 PetriNetUnfolderBase]: 3961/5947 cut-off events. [2024-06-27 18:53:53,394 INFO L125 PetriNetUnfolderBase]: For 38148/38148 co-relation queries the response was YES. [2024-06-27 18:53:53,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26093 conditions, 5947 events. 3961/5947 cut-off events. For 38148/38148 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33111 event pairs, 809 based on Foata normal form. 4/5948 useless extension candidates. Maximal degree in co-relation 26036. Up to 5457 conditions per place. [2024-06-27 18:53:53,439 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 175 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2024-06-27 18:53:53,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 214 transitions, 2088 flow [2024-06-27 18:53:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:53:53,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:53:53,441 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1491 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:53:53,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 214 transitions, 2088 flow [2024-06-27 18:53:53,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 214 transitions, 2004 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:53:53,507 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1496 flow [2024-06-27 18:53:53,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-27 18:53:53,507 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-27 18:53:53,507 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1496 flow [2024-06-27 18:53:53,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:53,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:53,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:53,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:53:53,508 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:53,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1186933599, now seen corresponding path program 4 times [2024-06-27 18:53:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:53,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505951175] [2024-06-27 18:53:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:56,327 INFO 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 18:53:56,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:56,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505951175] [2024-06-27 18:53:56,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505951175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:56,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:56,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128342152] [2024-06-27 18:53:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:56,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:56,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:53:56,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1496 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:56,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:56,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:53:56,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:58,056 INFO L124 PetriNetUnfolderBase]: 3667/5630 cut-off events. [2024-06-27 18:53:58,056 INFO L125 PetriNetUnfolderBase]: For 43319/43416 co-relation queries the response was YES. [2024-06-27 18:53:58,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25327 conditions, 5630 events. 3667/5630 cut-off events. For 43319/43416 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32552 event pairs, 434 based on Foata normal form. 39/5522 useless extension candidates. Maximal degree in co-relation 25269. Up to 4691 conditions per place. [2024-06-27 18:53:58,098 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 126 selfloop transitions, 52 changer transitions 0/206 dead transitions. [2024-06-27 18:53:58,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 206 transitions, 1996 flow [2024-06-27 18:53:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 18:53:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775075987841946 [2024-06-27 18:53:58,099 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1496 flow. Second operand 7 states and 190 transitions. [2024-06-27 18:53:58,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 206 transitions, 1996 flow [2024-06-27 18:53:58,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 206 transitions, 1925 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:53:58,166 INFO L231 Difference]: Finished difference. Result has 130 places, 150 transitions, 1545 flow [2024-06-27 18:53:58,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1545, PETRI_PLACES=130, PETRI_TRANSITIONS=150} [2024-06-27 18:53:58,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-06-27 18:53:58,167 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 150 transitions, 1545 flow [2024-06-27 18:53:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:58,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:58,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:53:58,167 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1186748901, now seen corresponding path program 2 times [2024-06-27 18:53:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326721859] [2024-06-27 18:53:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326721859] [2024-06-27 18:54:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326721859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:00,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:00,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388398223] [2024-06-27 18:54:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:00,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:00,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 150 transitions, 1545 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:00,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:00,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:00,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:02,411 INFO L124 PetriNetUnfolderBase]: 3998/6004 cut-off events. [2024-06-27 18:54:02,411 INFO L125 PetriNetUnfolderBase]: For 44413/44413 co-relation queries the response was YES. [2024-06-27 18:54:02,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27136 conditions, 6004 events. 3998/6004 cut-off events. For 44413/44413 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 33510 event pairs, 804 based on Foata normal form. 4/6005 useless extension candidates. Maximal degree in co-relation 27077. Up to 5466 conditions per place. [2024-06-27 18:54:02,459 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 164 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-27 18:54:02,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 205 transitions, 2098 flow [2024-06-27 18:54:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:54:02,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:54:02,461 INFO L175 Difference]: Start difference. First operand has 130 places, 150 transitions, 1545 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:54:02,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 205 transitions, 2098 flow [2024-06-27 18:54:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 205 transitions, 1982 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:54:02,531 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1529 flow [2024-06-27 18:54:02,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1529, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-27 18:54:02,532 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 18:54:02,532 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1529 flow [2024-06-27 18:54:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:02,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:02,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:54:02,533 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:02,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash -958847751, now seen corresponding path program 3 times [2024-06-27 18:54:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788732404] [2024-06-27 18:54:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:05,273 INFO 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 18:54:05,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788732404] [2024-06-27 18:54:05,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788732404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:05,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:05,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:05,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386046225] [2024-06-27 18:54:05,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:05,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:05,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:05,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:05,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1529 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:05,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:05,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:05,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:06,889 INFO L124 PetriNetUnfolderBase]: 4048/6091 cut-off events. [2024-06-27 18:54:06,889 INFO L125 PetriNetUnfolderBase]: For 46267/46292 co-relation queries the response was YES. [2024-06-27 18:54:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27713 conditions, 6091 events. 4048/6091 cut-off events. For 46267/46292 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34152 event pairs, 846 based on Foata normal form. 26/6114 useless extension candidates. Maximal degree in co-relation 27653. Up to 5586 conditions per place. [2024-06-27 18:54:06,933 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 167 selfloop transitions, 30 changer transitions 0/204 dead transitions. [2024-06-27 18:54:06,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2082 flow [2024-06-27 18:54:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:54:06,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:54:06,935 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1529 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:54:06,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2082 flow [2024-06-27 18:54:06,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 204 transitions, 2000 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:06,997 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1540 flow [2024-06-27 18:54:06,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1540, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-27 18:54:06,998 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-06-27 18:54:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1540 flow [2024-06-27 18:54:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:06,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:06,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:06,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:54:06,999 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:06,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -950276871, now seen corresponding path program 4 times [2024-06-27 18:54:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:06,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73427145] [2024-06-27 18:54:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:09,357 INFO 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 18:54:09,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:09,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73427145] [2024-06-27 18:54:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73427145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:09,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563364128] [2024-06-27 18:54:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:09,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:09,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:09,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:09,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1540 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:09,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:09,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:09,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:10,909 INFO L124 PetriNetUnfolderBase]: 4040/6079 cut-off events. [2024-06-27 18:54:10,909 INFO L125 PetriNetUnfolderBase]: For 45114/45139 co-relation queries the response was YES. [2024-06-27 18:54:10,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27476 conditions, 6079 events. 4040/6079 cut-off events. For 45114/45139 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34043 event pairs, 748 based on Foata normal form. 26/6102 useless extension candidates. Maximal degree in co-relation 27415. Up to 5378 conditions per place. [2024-06-27 18:54:10,952 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 164 selfloop transitions, 38 changer transitions 0/209 dead transitions. [2024-06-27 18:54:10,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 2129 flow [2024-06-27 18:54:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:54:10,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:54:10,954 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1540 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:54:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 2129 flow [2024-06-27 18:54:11,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 209 transitions, 2060 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:11,014 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1622 flow [2024-06-27 18:54:11,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1622, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-27 18:54:11,014 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 85 predicate places. [2024-06-27 18:54:11,014 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1622 flow [2024-06-27 18:54:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:11,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:11,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:54:11,015 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 493283245, now seen corresponding path program 1 times [2024-06-27 18:54:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117557060] [2024-06-27 18:54:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117557060] [2024-06-27 18:54:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117557060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:12,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:12,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:54:12,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799724721] [2024-06-27 18:54:12,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:12,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:54:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:54:12,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:54:12,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:54:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1622 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 18:54:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:54:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:13,757 INFO L124 PetriNetUnfolderBase]: 3766/5981 cut-off events. [2024-06-27 18:54:13,757 INFO L125 PetriNetUnfolderBase]: For 48944/49001 co-relation queries the response was YES. [2024-06-27 18:54:13,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27152 conditions, 5981 events. 3766/5981 cut-off events. For 48944/49001 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35468 event pairs, 1043 based on Foata normal form. 52/6001 useless extension candidates. Maximal degree in co-relation 27089. Up to 5345 conditions per place. [2024-06-27 18:54:13,803 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 151 selfloop transitions, 16 changer transitions 0/181 dead transitions. [2024-06-27 18:54:13,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 181 transitions, 2030 flow [2024-06-27 18:54:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:54:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:54:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:54:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:54:13,805 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1622 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:54:13,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 181 transitions, 2030 flow [2024-06-27 18:54:13,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 181 transitions, 1975 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:13,880 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1647 flow [2024-06-27 18:54:13,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1647, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-27 18:54:13,880 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 87 predicate places. [2024-06-27 18:54:13,880 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1647 flow [2024-06-27 18:54:13,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 18:54:13,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:13,880 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 18:54:13,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:54:13,881 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:13,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1509336102, now seen corresponding path program 1 times [2024-06-27 18:54:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744843772] [2024-06-27 18:54:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:17,379 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 18:54:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744843772] [2024-06-27 18:54:17,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744843772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:17,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:17,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692951904] [2024-06-27 18:54:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:17,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:17,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:17,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1647 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:17,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:17,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:17,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:19,124 INFO L124 PetriNetUnfolderBase]: 4300/6506 cut-off events. [2024-06-27 18:54:19,124 INFO L125 PetriNetUnfolderBase]: For 57786/57786 co-relation queries the response was YES. [2024-06-27 18:54:19,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31033 conditions, 6506 events. 4300/6506 cut-off events. For 57786/57786 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37139 event pairs, 449 based on Foata normal form. 12/6515 useless extension candidates. Maximal degree in co-relation 30968. Up to 4902 conditions per place. [2024-06-27 18:54:19,174 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 193 selfloop transitions, 58 changer transitions 0/258 dead transitions. [2024-06-27 18:54:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 258 transitions, 2568 flow [2024-06-27 18:54:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:54:19,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-27 18:54:19,175 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1647 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:54:19,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 258 transitions, 2568 flow [2024-06-27 18:54:19,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 258 transitions, 2518 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:19,266 INFO L231 Difference]: Finished difference. Result has 146 places, 167 transitions, 1803 flow [2024-06-27 18:54:19,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1803, PETRI_PLACES=146, PETRI_TRANSITIONS=167} [2024-06-27 18:54:19,267 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 95 predicate places. [2024-06-27 18:54:19,267 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 167 transitions, 1803 flow [2024-06-27 18:54:19,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:19,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:19,267 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 18:54:19,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:54:19,267 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:19,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1511213772, now seen corresponding path program 2 times [2024-06-27 18:54:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:19,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217766679] [2024-06-27 18:54:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:19,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:22,843 INFO 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 18:54:22,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217766679] [2024-06-27 18:54:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217766679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:22,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29482478] [2024-06-27 18:54:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:22,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:22,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 167 transitions, 1803 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:22,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:22,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:22,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:25,053 INFO L124 PetriNetUnfolderBase]: 4476/6802 cut-off events. [2024-06-27 18:54:25,053 INFO L125 PetriNetUnfolderBase]: For 66055/66055 co-relation queries the response was YES. [2024-06-27 18:54:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33241 conditions, 6802 events. 4476/6802 cut-off events. For 66055/66055 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 39343 event pairs, 886 based on Foata normal form. 16/6815 useless extension candidates. Maximal degree in co-relation 33173. Up to 5834 conditions per place. [2024-06-27 18:54:25,102 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 187 selfloop transitions, 56 changer transitions 0/250 dead transitions. [2024-06-27 18:54:25,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 250 transitions, 2543 flow [2024-06-27 18:54:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:54:25,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:54:25,104 INFO L175 Difference]: Start difference. First operand has 146 places, 167 transitions, 1803 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:54:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 250 transitions, 2543 flow [2024-06-27 18:54:25,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 250 transitions, 2457 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 18:54:25,208 INFO L231 Difference]: Finished difference. Result has 151 places, 168 transitions, 1855 flow [2024-06-27 18:54:25,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1855, PETRI_PLACES=151, PETRI_TRANSITIONS=168} [2024-06-27 18:54:25,209 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 100 predicate places. [2024-06-27 18:54:25,209 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 168 transitions, 1855 flow [2024-06-27 18:54:25,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:25,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:25,210 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 18:54:25,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:54:25,210 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:25,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1597901862, now seen corresponding path program 3 times [2024-06-27 18:54:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:25,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887560379] [2024-06-27 18:54:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:25,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:28,760 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 18:54:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887560379] [2024-06-27 18:54:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887560379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:28,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836608136] [2024-06-27 18:54:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:28,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:28,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 168 transitions, 1855 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:28,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:28,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:28,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:30,864 INFO L124 PetriNetUnfolderBase]: 4602/7000 cut-off events. [2024-06-27 18:54:30,864 INFO L125 PetriNetUnfolderBase]: For 68850/68850 co-relation queries the response was YES. [2024-06-27 18:54:30,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34530 conditions, 7000 events. 4602/7000 cut-off events. For 68850/68850 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40825 event pairs, 866 based on Foata normal form. 12/7009 useless extension candidates. Maximal degree in co-relation 34460. Up to 5812 conditions per place. [2024-06-27 18:54:30,923 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 191 selfloop transitions, 58 changer transitions 0/256 dead transitions. [2024-06-27 18:54:30,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 256 transitions, 2643 flow [2024-06-27 18:54:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:54:30,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-06-27 18:54:30,925 INFO L175 Difference]: Start difference. First operand has 151 places, 168 transitions, 1855 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:54:30,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 256 transitions, 2643 flow [2024-06-27 18:54:31,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 256 transitions, 2530 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:54:31,038 INFO L231 Difference]: Finished difference. Result has 154 places, 171 transitions, 1915 flow [2024-06-27 18:54:31,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1915, PETRI_PLACES=154, PETRI_TRANSITIONS=171} [2024-06-27 18:54:31,038 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-27 18:54:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 171 transitions, 1915 flow [2024-06-27 18:54:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:31,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:31,038 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 18:54:31,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:54:31,039 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:31,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 882471086, now seen corresponding path program 4 times [2024-06-27 18:54:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507571106] [2024-06-27 18:54:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:34,783 INFO 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 18:54:34,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507571106] [2024-06-27 18:54:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507571106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:34,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581721335] [2024-06-27 18:54:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:34,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:34,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:34,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:34,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 171 transitions, 1915 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:34,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:34,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:34,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:36,924 INFO L124 PetriNetUnfolderBase]: 4778/7270 cut-off events. [2024-06-27 18:54:36,925 INFO L125 PetriNetUnfolderBase]: For 76096/76096 co-relation queries the response was YES. [2024-06-27 18:54:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36241 conditions, 7270 events. 4778/7270 cut-off events. For 76096/76096 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42777 event pairs, 938 based on Foata normal form. 16/7283 useless extension candidates. Maximal degree in co-relation 36169. Up to 6473 conditions per place. [2024-06-27 18:54:36,986 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 225 selfloop transitions, 40 changer transitions 0/272 dead transitions. [2024-06-27 18:54:36,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 272 transitions, 2755 flow [2024-06-27 18:54:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:54:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:54:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-06-27 18:54:36,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 18:54:36,987 INFO L175 Difference]: Start difference. First operand has 154 places, 171 transitions, 1915 flow. Second operand 11 states and 282 transitions. [2024-06-27 18:54:36,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 272 transitions, 2755 flow [2024-06-27 18:54:37,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 272 transitions, 2677 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:37,110 INFO L231 Difference]: Finished difference. Result has 160 places, 172 transitions, 1945 flow [2024-06-27 18:54:37,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1945, PETRI_PLACES=160, PETRI_TRANSITIONS=172} [2024-06-27 18:54:37,111 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:54:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 172 transitions, 1945 flow [2024-06-27 18:54:37,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:37,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:37,111 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 18:54:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:54:37,111 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:37,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash 877108706, now seen corresponding path program 5 times [2024-06-27 18:54:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:37,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606122184] [2024-06-27 18:54:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:40,693 INFO 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 18:54:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606122184] [2024-06-27 18:54:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606122184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:40,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279314120] [2024-06-27 18:54:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:40,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:40,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 172 transitions, 1945 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:40,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:40,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:40,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:42,667 INFO L124 PetriNetUnfolderBase]: 4954/7566 cut-off events. [2024-06-27 18:54:42,667 INFO L125 PetriNetUnfolderBase]: For 81973/81973 co-relation queries the response was YES. [2024-06-27 18:54:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38082 conditions, 7566 events. 4954/7566 cut-off events. For 81973/81973 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 45165 event pairs, 974 based on Foata normal form. 16/7579 useless extension candidates. Maximal degree in co-relation 38008. Up to 6745 conditions per place. [2024-06-27 18:54:42,734 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 205 selfloop transitions, 39 changer transitions 0/251 dead transitions. [2024-06-27 18:54:42,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 251 transitions, 2681 flow [2024-06-27 18:54:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:54:42,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:54:42,735 INFO L175 Difference]: Start difference. First operand has 160 places, 172 transitions, 1945 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:54:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 251 transitions, 2681 flow [2024-06-27 18:54:42,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 251 transitions, 2596 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 18:54:42,899 INFO L231 Difference]: Finished difference. Result has 160 places, 173 transitions, 1968 flow [2024-06-27 18:54:42,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1968, PETRI_PLACES=160, PETRI_TRANSITIONS=173} [2024-06-27 18:54:42,900 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:54:42,900 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 173 transitions, 1968 flow [2024-06-27 18:54:42,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:42,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:42,900 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 18:54:42,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:54:42,900 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:42,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash -209479596, now seen corresponding path program 6 times [2024-06-27 18:54:42,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:42,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313084592] [2024-06-27 18:54:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:42,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:46,462 INFO 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 18:54:46,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:46,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313084592] [2024-06-27 18:54:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313084592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:46,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583995182] [2024-06-27 18:54:46,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:46,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:46,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:46,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:46,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:46,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 173 transitions, 1968 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:46,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:46,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:46,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:48,505 INFO L124 PetriNetUnfolderBase]: 5080/7764 cut-off events. [2024-06-27 18:54:48,506 INFO L125 PetriNetUnfolderBase]: For 86900/86900 co-relation queries the response was YES. [2024-06-27 18:54:48,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39194 conditions, 7764 events. 5080/7764 cut-off events. For 86900/86900 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 46515 event pairs, 954 based on Foata normal form. 12/7773 useless extension candidates. Maximal degree in co-relation 39119. Up to 6491 conditions per place. [2024-06-27 18:54:48,567 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 208 selfloop transitions, 42 changer transitions 0/257 dead transitions. [2024-06-27 18:54:48,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 257 transitions, 2762 flow [2024-06-27 18:54:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:54:48,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:54:48,568 INFO L175 Difference]: Start difference. First operand has 160 places, 173 transitions, 1968 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:54:48,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 257 transitions, 2762 flow [2024-06-27 18:54:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 257 transitions, 2677 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:54:48,731 INFO L231 Difference]: Finished difference. Result has 163 places, 176 transitions, 2041 flow [2024-06-27 18:54:48,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2041, PETRI_PLACES=163, PETRI_TRANSITIONS=176} [2024-06-27 18:54:48,732 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-27 18:54:48,732 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 176 transitions, 2041 flow [2024-06-27 18:54:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:48,732 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 18:54:48,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:54:48,732 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:48,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:48,733 INFO L85 PathProgramCache]: Analyzing trace with hash -203754144, now seen corresponding path program 1 times [2024-06-27 18:54:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:48,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295688202] [2024-06-27 18:54:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:52,427 INFO 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 18:54:52,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295688202] [2024-06-27 18:54:52,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295688202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:52,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:52,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028879142] [2024-06-27 18:54:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:52,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:52,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:52,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 176 transitions, 2041 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:52,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:52,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:52,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:54,711 INFO L124 PetriNetUnfolderBase]: 5206/7986 cut-off events. [2024-06-27 18:54:54,711 INFO L125 PetriNetUnfolderBase]: For 92651/92651 co-relation queries the response was YES. [2024-06-27 18:54:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40379 conditions, 7986 events. 5206/7986 cut-off events. For 92651/92651 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 48291 event pairs, 990 based on Foata normal form. 12/7995 useless extension candidates. Maximal degree in co-relation 40302. Up to 6689 conditions per place. [2024-06-27 18:54:54,887 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 229 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-27 18:54:54,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 280 transitions, 2906 flow [2024-06-27 18:54:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:54:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:54:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 18:54:54,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493230174081238 [2024-06-27 18:54:54,888 INFO L175 Difference]: Start difference. First operand has 163 places, 176 transitions, 2041 flow. Second operand 11 states and 284 transitions. [2024-06-27 18:54:54,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 280 transitions, 2906 flow [2024-06-27 18:54:55,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 280 transitions, 2839 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:55,050 INFO L231 Difference]: Finished difference. Result has 169 places, 177 transitions, 2086 flow [2024-06-27 18:54:55,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2086, PETRI_PLACES=169, PETRI_TRANSITIONS=177} [2024-06-27 18:54:55,050 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 118 predicate places. [2024-06-27 18:54:55,050 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 177 transitions, 2086 flow [2024-06-27 18:54:55,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:55,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:55,051 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 18:54:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:54:55,051 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:55,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1859913620, now seen corresponding path program 7 times [2024-06-27 18:54:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934862015] [2024-06-27 18:54:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934862015] [2024-06-27 18:54:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934862015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063492094] [2024-06-27 18:54:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:58,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:58,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:54:58,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 177 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:58,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:58,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:54:58,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:00,966 INFO L124 PetriNetUnfolderBase]: 5382/8284 cut-off events. [2024-06-27 18:55:00,966 INFO L125 PetriNetUnfolderBase]: For 100692/100692 co-relation queries the response was YES. [2024-06-27 18:55:01,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42296 conditions, 8284 events. 5382/8284 cut-off events. For 100692/100692 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 50749 event pairs, 1074 based on Foata normal form. 16/8297 useless extension candidates. Maximal degree in co-relation 42217. Up to 7058 conditions per place. [2024-06-27 18:55:01,037 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 189 selfloop transitions, 53 changer transitions 0/249 dead transitions. [2024-06-27 18:55:01,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 249 transitions, 2800 flow [2024-06-27 18:55:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:55:01,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-27 18:55:01,038 INFO L175 Difference]: Start difference. First operand has 169 places, 177 transitions, 2086 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:55:01,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 249 transitions, 2800 flow [2024-06-27 18:55:01,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 249 transitions, 2704 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 18:55:01,224 INFO L231 Difference]: Finished difference. Result has 168 places, 178 transitions, 2133 flow [2024-06-27 18:55:01,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=168, PETRI_TRANSITIONS=178} [2024-06-27 18:55:01,225 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 18:55:01,225 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 178 transitions, 2133 flow [2024-06-27 18:55:01,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:01,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:01,225 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 18:55:01,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:55:01,225 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:01,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash -797562300, now seen corresponding path program 8 times [2024-06-27 18:55:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:01,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961789885] [2024-06-27 18:55:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:01,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:04,523 INFO 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 18:55:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961789885] [2024-06-27 18:55:04,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961789885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:04,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:04,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827945817] [2024-06-27 18:55:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:04,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 178 transitions, 2133 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:06,883 INFO L124 PetriNetUnfolderBase]: 5508/8482 cut-off events. [2024-06-27 18:55:06,883 INFO L125 PetriNetUnfolderBase]: For 107705/107705 co-relation queries the response was YES. [2024-06-27 18:55:06,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43632 conditions, 8482 events. 5508/8482 cut-off events. For 107705/107705 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 52109 event pairs, 739 based on Foata normal form. 12/8491 useless extension candidates. Maximal degree in co-relation 43552. Up to 6230 conditions per place. [2024-06-27 18:55:06,972 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 190 selfloop transitions, 59 changer transitions 0/256 dead transitions. [2024-06-27 18:55:06,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 3002 flow [2024-06-27 18:55:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:55:06,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-06-27 18:55:06,973 INFO L175 Difference]: Start difference. First operand has 168 places, 178 transitions, 2133 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:55:06,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 3002 flow [2024-06-27 18:55:07,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 256 transitions, 2892 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:55:07,228 INFO L231 Difference]: Finished difference. Result has 171 places, 180 transitions, 2208 flow [2024-06-27 18:55:07,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2208, PETRI_PLACES=171, PETRI_TRANSITIONS=180} [2024-06-27 18:55:07,228 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:55:07,229 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 180 transitions, 2208 flow [2024-06-27 18:55:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:07,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:07,229 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 18:55:07,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:55:07,229 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:07,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash -792052050, now seen corresponding path program 9 times [2024-06-27 18:55:07,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:07,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874634744] [2024-06-27 18:55:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:07,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874634744] [2024-06-27 18:55:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874634744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:10,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601854349] [2024-06-27 18:55:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:10,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:10,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 180 transitions, 2208 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:10,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:10,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:10,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:13,385 INFO L124 PetriNetUnfolderBase]: 5684/8754 cut-off events. [2024-06-27 18:55:13,385 INFO L125 PetriNetUnfolderBase]: For 120418/120418 co-relation queries the response was YES. [2024-06-27 18:55:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46021 conditions, 8754 events. 5684/8754 cut-off events. For 120418/120418 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 54347 event pairs, 1118 based on Foata normal form. 16/8767 useless extension candidates. Maximal degree in co-relation 45939. Up to 7528 conditions per place. [2024-06-27 18:55:13,464 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 212 selfloop transitions, 55 changer transitions 0/274 dead transitions. [2024-06-27 18:55:13,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 274 transitions, 3041 flow [2024-06-27 18:55:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 18:55:13,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2024-06-27 18:55:13,466 INFO L175 Difference]: Start difference. First operand has 171 places, 180 transitions, 2208 flow. Second operand 10 states and 263 transitions. [2024-06-27 18:55:13,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 274 transitions, 3041 flow [2024-06-27 18:55:13,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 2855 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:13,741 INFO L231 Difference]: Finished difference. Result has 173 places, 181 transitions, 2174 flow [2024-06-27 18:55:13,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2174, PETRI_PLACES=173, PETRI_TRANSITIONS=181} [2024-06-27 18:55:13,741 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 122 predicate places. [2024-06-27 18:55:13,741 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 181 transitions, 2174 flow [2024-06-27 18:55:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:13,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:13,742 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 18:55:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:55:13,742 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:13,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 340277058, now seen corresponding path program 10 times [2024-06-27 18:55:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:13,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344852574] [2024-06-27 18:55:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:16,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:16,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344852574] [2024-06-27 18:55:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344852574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:16,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:16,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:16,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933713006] [2024-06-27 18:55:16,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:16,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:16,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:16,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 181 transitions, 2174 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:16,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:16,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:16,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:19,201 INFO L124 PetriNetUnfolderBase]: 5656/8723 cut-off events. [2024-06-27 18:55:19,201 INFO L125 PetriNetUnfolderBase]: For 108773/108798 co-relation queries the response was YES. [2024-06-27 18:55:19,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44173 conditions, 8723 events. 5656/8723 cut-off events. For 108773/108798 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 54240 event pairs, 1126 based on Foata normal form. 38/8758 useless extension candidates. Maximal degree in co-relation 44092. Up to 7716 conditions per place. [2024-06-27 18:55:19,289 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 213 selfloop transitions, 52 changer transitions 0/272 dead transitions. [2024-06-27 18:55:19,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 272 transitions, 3001 flow [2024-06-27 18:55:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:55:19,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468085106382978 [2024-06-27 18:55:19,291 INFO L175 Difference]: Start difference. First operand has 173 places, 181 transitions, 2174 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:55:19,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 272 transitions, 3001 flow [2024-06-27 18:55:19,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 272 transitions, 2875 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:19,569 INFO L231 Difference]: Finished difference. Result has 175 places, 182 transitions, 2189 flow [2024-06-27 18:55:19,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2189, PETRI_PLACES=175, PETRI_TRANSITIONS=182} [2024-06-27 18:55:19,569 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-06-27 18:55:19,569 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 182 transitions, 2189 flow [2024-06-27 18:55:19,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:19,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:19,570 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 18:55:19,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:55:19,570 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:19,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1865491202, now seen corresponding path program 2 times [2024-06-27 18:55:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:19,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949562537] [2024-06-27 18:55:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949562537] [2024-06-27 18:55:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949562537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:22,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387426686] [2024-06-27 18:55:22,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:22,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:22,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 182 transitions, 2189 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:22,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:22,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:22,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:25,615 INFO L124 PetriNetUnfolderBase]: 5782/8932 cut-off events. [2024-06-27 18:55:25,616 INFO L125 PetriNetUnfolderBase]: For 106362/106362 co-relation queries the response was YES. [2024-06-27 18:55:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44652 conditions, 8932 events. 5782/8932 cut-off events. For 106362/106362 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 55713 event pairs, 1058 based on Foata normal form. 12/8941 useless extension candidates. Maximal degree in co-relation 44570. Up to 6778 conditions per place. [2024-06-27 18:55:25,688 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 209 selfloop transitions, 63 changer transitions 0/279 dead transitions. [2024-06-27 18:55:25,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 3032 flow [2024-06-27 18:55:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 18:55:25,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:55:25,689 INFO L175 Difference]: Start difference. First operand has 175 places, 182 transitions, 2189 flow. Second operand 10 states and 265 transitions. [2024-06-27 18:55:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 3032 flow [2024-06-27 18:55:25,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 279 transitions, 2921 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:25,895 INFO L231 Difference]: Finished difference. Result has 177 places, 183 transitions, 2232 flow [2024-06-27 18:55:25,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2232, PETRI_PLACES=177, PETRI_TRANSITIONS=183} [2024-06-27 18:55:25,895 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2024-06-27 18:55:25,896 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 183 transitions, 2232 flow [2024-06-27 18:55:25,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:25,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:25,896 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 18:55:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:55:25,896 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:25,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash 596992770, now seen corresponding path program 3 times [2024-06-27 18:55:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:25,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262320722] [2024-06-27 18:55:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:28,838 INFO 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 18:55:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262320722] [2024-06-27 18:55:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262320722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11896737] [2024-06-27 18:55:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:28,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:28,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 183 transitions, 2232 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:28,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:28,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:28,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:31,390 INFO L124 PetriNetUnfolderBase]: 5908/9171 cut-off events. [2024-06-27 18:55:31,390 INFO L125 PetriNetUnfolderBase]: For 114285/114310 co-relation queries the response was YES. [2024-06-27 18:55:31,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45991 conditions, 9171 events. 5908/9171 cut-off events. For 114285/114310 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 58017 event pairs, 1172 based on Foata normal form. 34/9202 useless extension candidates. Maximal degree in co-relation 45908. Up to 7892 conditions per place. [2024-06-27 18:55:31,478 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 226 selfloop transitions, 55 changer transitions 0/288 dead transitions. [2024-06-27 18:55:31,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 288 transitions, 3127 flow [2024-06-27 18:55:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:55:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:55:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 18:55:31,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493230174081238 [2024-06-27 18:55:31,479 INFO L175 Difference]: Start difference. First operand has 177 places, 183 transitions, 2232 flow. Second operand 11 states and 284 transitions. [2024-06-27 18:55:31,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 288 transitions, 3127 flow [2024-06-27 18:55:31,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 288 transitions, 2987 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:31,730 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2230 flow [2024-06-27 18:55:31,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2230, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2024-06-27 18:55:31,730 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-27 18:55:31,730 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2230 flow [2024-06-27 18:55:31,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:31,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:31,731 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 18:55:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:55:31,731 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:31,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash 606189540, now seen corresponding path program 4 times [2024-06-27 18:55:31,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:31,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495287234] [2024-06-27 18:55:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:31,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:34,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495287234] [2024-06-27 18:55:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495287234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:34,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:34,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:34,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889553179] [2024-06-27 18:55:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:34,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:34,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:34,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:34,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2230 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:34,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:34,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:34,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:37,135 INFO L124 PetriNetUnfolderBase]: 5888/9131 cut-off events. [2024-06-27 18:55:37,135 INFO L125 PetriNetUnfolderBase]: For 105409/105434 co-relation queries the response was YES. [2024-06-27 18:55:37,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44988 conditions, 9131 events. 5888/9131 cut-off events. For 105409/105434 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 57386 event pairs, 1044 based on Foata normal form. 34/9162 useless extension candidates. Maximal degree in co-relation 44904. Up to 6214 conditions per place. [2024-06-27 18:55:37,232 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 203 selfloop transitions, 67 changer transitions 0/277 dead transitions. [2024-06-27 18:55:37,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 2989 flow [2024-06-27 18:55:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:55:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551063829787234 [2024-06-27 18:55:37,234 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2230 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:55:37,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 2989 flow [2024-06-27 18:55:37,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 277 transitions, 2869 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 18:55:37,487 INFO L231 Difference]: Finished difference. Result has 180 places, 183 transitions, 2184 flow [2024-06-27 18:55:37,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2184, PETRI_PLACES=180, PETRI_TRANSITIONS=183} [2024-06-27 18:55:37,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-27 18:55:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 183 transitions, 2184 flow [2024-06-27 18:55:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:37,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:37,488 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 18:55:37,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:55:37,488 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:37,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1383969236, now seen corresponding path program 1 times [2024-06-27 18:55:37,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:37,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533826394] [2024-06-27 18:55:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:37,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:39,259 INFO 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 18:55:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:39,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533826394] [2024-06-27 18:55:39,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533826394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:39,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:39,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:55:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252239411] [2024-06-27 18:55:39,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:55:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:55:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:55:39,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:55:39,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 183 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:55:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:41,688 INFO L124 PetriNetUnfolderBase]: 6102/9519 cut-off events. [2024-06-27 18:55:41,688 INFO L125 PetriNetUnfolderBase]: For 112255/112293 co-relation queries the response was YES. [2024-06-27 18:55:41,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47850 conditions, 9519 events. 6102/9519 cut-off events. For 112255/112293 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 60881 event pairs, 1199 based on Foata normal form. 40/9517 useless extension candidates. Maximal degree in co-relation 47765. Up to 8506 conditions per place. [2024-06-27 18:55:41,770 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 202 selfloop transitions, 70 changer transitions 0/287 dead transitions. [2024-06-27 18:55:41,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 287 transitions, 3378 flow [2024-06-27 18:55:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 18:55:41,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297872340425532 [2024-06-27 18:55:41,771 INFO L175 Difference]: Start difference. First operand has 180 places, 183 transitions, 2184 flow. Second operand 10 states and 249 transitions. [2024-06-27 18:55:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 287 transitions, 3378 flow [2024-06-27 18:55:42,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 287 transitions, 3147 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 18:55:42,068 INFO L231 Difference]: Finished difference. Result has 184 places, 222 transitions, 2602 flow [2024-06-27 18:55:42,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2602, PETRI_PLACES=184, PETRI_TRANSITIONS=222} [2024-06-27 18:55:42,069 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-27 18:55:42,069 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 222 transitions, 2602 flow [2024-06-27 18:55:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:42,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:42,069 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 18:55:42,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:55:42,069 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:42,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1244150670, now seen corresponding path program 2 times [2024-06-27 18:55:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524908807] [2024-06-27 18:55:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:44,730 INFO 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 18:55:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524908807] [2024-06-27 18:55:44,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524908807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:44,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:44,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:55:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329119302] [2024-06-27 18:55:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:55:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:55:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:55:44,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:55:44,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 222 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:44,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:44,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:55:44,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:46,855 INFO L124 PetriNetUnfolderBase]: 6356/9865 cut-off events. [2024-06-27 18:55:46,855 INFO L125 PetriNetUnfolderBase]: For 121701/121788 co-relation queries the response was YES. [2024-06-27 18:55:46,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50553 conditions, 9865 events. 6356/9865 cut-off events. For 121701/121788 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62978 event pairs, 1199 based on Foata normal form. 58/9878 useless extension candidates. Maximal degree in co-relation 50465. Up to 8696 conditions per place. [2024-06-27 18:55:46,954 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 190 selfloop transitions, 92 changer transitions 0/297 dead transitions. [2024-06-27 18:55:46,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 297 transitions, 3714 flow [2024-06-27 18:55:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:55:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:55:46,955 INFO L175 Difference]: Start difference. First operand has 184 places, 222 transitions, 2602 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:55:46,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 297 transitions, 3714 flow [2024-06-27 18:55:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 297 transitions, 3591 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-27 18:55:47,312 INFO L231 Difference]: Finished difference. Result has 190 places, 246 transitions, 2998 flow [2024-06-27 18:55:47,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2998, PETRI_PLACES=190, PETRI_TRANSITIONS=246} [2024-06-27 18:55:47,312 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 139 predicate places. [2024-06-27 18:55:47,312 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 246 transitions, 2998 flow [2024-06-27 18:55:47,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:47,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:47,312 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 18:55:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:55:47,313 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:47,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1825159792, now seen corresponding path program 3 times [2024-06-27 18:55:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084153246] [2024-06-27 18:55:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:49,744 INFO 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 18:55:49,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:49,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084153246] [2024-06-27 18:55:49,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084153246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:49,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:49,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:55:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572624879] [2024-06-27 18:55:49,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:49,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:55:49,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:55:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:55:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:55:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 246 transitions, 2998 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:55:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:51,693 INFO L124 PetriNetUnfolderBase]: 6340/9857 cut-off events. [2024-06-27 18:55:51,693 INFO L125 PetriNetUnfolderBase]: For 124352/124439 co-relation queries the response was YES. [2024-06-27 18:55:51,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50660 conditions, 9857 events. 6340/9857 cut-off events. For 124352/124439 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63195 event pairs, 1217 based on Foata normal form. 58/9870 useless extension candidates. Maximal degree in co-relation 50570. Up to 8688 conditions per place. [2024-06-27 18:55:51,803 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 178 selfloop transitions, 88 changer transitions 0/281 dead transitions. [2024-06-27 18:55:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 281 transitions, 3640 flow [2024-06-27 18:55:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:55:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:55:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:55:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:55:51,804 INFO L175 Difference]: Start difference. First operand has 190 places, 246 transitions, 2998 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:55:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 281 transitions, 3640 flow [2024-06-27 18:55:52,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 281 transitions, 3497 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 18:55:52,208 INFO L231 Difference]: Finished difference. Result has 193 places, 246 transitions, 3068 flow [2024-06-27 18:55:52,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3068, PETRI_PLACES=193, PETRI_TRANSITIONS=246} [2024-06-27 18:55:52,208 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-27 18:55:52,209 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 246 transitions, 3068 flow [2024-06-27 18:55:52,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:52,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:52,211 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 18:55:52,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:55:52,212 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:52,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1840831222, now seen corresponding path program 4 times [2024-06-27 18:55:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:52,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738830434] [2024-06-27 18:55:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:54,461 INFO 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 18:55:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738830434] [2024-06-27 18:55:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738830434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:54,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:55:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115359332] [2024-06-27 18:55:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:54,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:55:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:55:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:55:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:55:54,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 246 transitions, 3068 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:54,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:54,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:55:54,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:56,516 INFO L124 PetriNetUnfolderBase]: 6342/9856 cut-off events. [2024-06-27 18:55:56,516 INFO L125 PetriNetUnfolderBase]: For 130983/131105 co-relation queries the response was YES. [2024-06-27 18:55:56,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50636 conditions, 9856 events. 6342/9856 cut-off events. For 130983/131105 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 63138 event pairs, 1238 based on Foata normal form. 99/9906 useless extension candidates. Maximal degree in co-relation 50545. Up to 8534 conditions per place. [2024-06-27 18:55:56,623 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 183 selfloop transitions, 85 changer transitions 0/283 dead transitions. [2024-06-27 18:55:56,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 283 transitions, 3792 flow [2024-06-27 18:55:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:55:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:55:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:55:56,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:55:56,625 INFO L175 Difference]: Start difference. First operand has 193 places, 246 transitions, 3068 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:55:56,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 283 transitions, 3792 flow [2024-06-27 18:55:56,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 283 transitions, 3593 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 18:55:56,939 INFO L231 Difference]: Finished difference. Result has 194 places, 253 transitions, 3175 flow [2024-06-27 18:55:56,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3175, PETRI_PLACES=194, PETRI_TRANSITIONS=253} [2024-06-27 18:55:56,939 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 143 predicate places. [2024-06-27 18:55:56,940 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 253 transitions, 3175 flow [2024-06-27 18:55:56,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:56,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:56,940 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 18:55:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:55:56,940 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:56,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1421346546, now seen corresponding path program 1 times [2024-06-27 18:55:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:56,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036339048] [2024-06-27 18:55:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:58,853 INFO 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 18:55:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036339048] [2024-06-27 18:55:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036339048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:58,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:58,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:55:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346579756] [2024-06-27 18:55:58,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:58,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:55:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:55:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:55:58,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:58,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 253 transitions, 3175 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:58,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:58,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:58,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:01,040 INFO L124 PetriNetUnfolderBase]: 6657/10566 cut-off events. [2024-06-27 18:56:01,041 INFO L125 PetriNetUnfolderBase]: For 131605/131607 co-relation queries the response was YES. [2024-06-27 18:56:01,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53793 conditions, 10566 events. 6657/10566 cut-off events. For 131605/131607 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 69935 event pairs, 1733 based on Foata normal form. 3/10567 useless extension candidates. Maximal degree in co-relation 53701. Up to 9652 conditions per place. [2024-06-27 18:56:01,151 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 259 selfloop transitions, 24 changer transitions 0/290 dead transitions. [2024-06-27 18:56:01,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 290 transitions, 4006 flow [2024-06-27 18:56:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:56:01,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2024-06-27 18:56:01,152 INFO L175 Difference]: Start difference. First operand has 194 places, 253 transitions, 3175 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:56:01,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 290 transitions, 4006 flow [2024-06-27 18:56:01,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 290 transitions, 3891 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:01,523 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3231 flow [2024-06-27 18:56:01,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3231, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-27 18:56:01,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-27 18:56:01,524 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3231 flow [2024-06-27 18:56:01,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:01,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:01,524 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 18:56:01,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:56:01,524 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:01,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash -445436592, now seen corresponding path program 2 times [2024-06-27 18:56:01,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:01,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893193516] [2024-06-27 18:56:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:01,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:03,454 INFO 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 18:56:03,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893193516] [2024-06-27 18:56:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893193516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068990035] [2024-06-27 18:56:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:03,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:03,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:03,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:03,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 3231 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:03,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:03,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:03,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:05,580 INFO L124 PetriNetUnfolderBase]: 6654/10562 cut-off events. [2024-06-27 18:56:05,580 INFO L125 PetriNetUnfolderBase]: For 134062/134064 co-relation queries the response was YES. [2024-06-27 18:56:05,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54143 conditions, 10562 events. 6654/10562 cut-off events. For 134062/134064 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 69948 event pairs, 1733 based on Foata normal form. 3/10563 useless extension candidates. Maximal degree in co-relation 54049. Up to 9660 conditions per place. [2024-06-27 18:56:05,673 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 257 selfloop transitions, 20 changer transitions 0/284 dead transitions. [2024-06-27 18:56:05,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 284 transitions, 3854 flow [2024-06-27 18:56:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:56:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:56:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:56:05,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:56:05,674 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3231 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:56:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 284 transitions, 3854 flow [2024-06-27 18:56:06,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 284 transitions, 3765 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:06,011 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3194 flow [2024-06-27 18:56:06,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3142, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3194, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2024-06-27 18:56:06,011 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 150 predicate places. [2024-06-27 18:56:06,011 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3194 flow [2024-06-27 18:56:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:06,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:06,011 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 18:56:06,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:56:06,012 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:06,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1840816342, now seen corresponding path program 1 times [2024-06-27 18:56:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607616437] [2024-06-27 18:56:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:08,795 INFO 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 18:56:08,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:08,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607616437] [2024-06-27 18:56:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607616437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:08,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099639022] [2024-06-27 18:56:08,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:08,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:08,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3194 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:08,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:08,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:08,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:10,850 INFO L124 PetriNetUnfolderBase]: 6328/10146 cut-off events. [2024-06-27 18:56:10,850 INFO L125 PetriNetUnfolderBase]: For 137407/137520 co-relation queries the response was YES. [2024-06-27 18:56:10,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52252 conditions, 10146 events. 6328/10146 cut-off events. For 137407/137520 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67681 event pairs, 1648 based on Foata normal form. 74/10176 useless extension candidates. Maximal degree in co-relation 52156. Up to 9129 conditions per place. [2024-06-27 18:56:10,957 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 255 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2024-06-27 18:56:10,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 289 transitions, 3862 flow [2024-06-27 18:56:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 18:56:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:56:10,958 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3194 flow. Second operand 6 states and 141 transitions. [2024-06-27 18:56:10,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 289 transitions, 3862 flow [2024-06-27 18:56:11,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 289 transitions, 3822 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:56:11,291 INFO L231 Difference]: Finished difference. Result has 203 places, 264 transitions, 3254 flow [2024-06-27 18:56:11,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3254, PETRI_PLACES=203, PETRI_TRANSITIONS=264} [2024-06-27 18:56:11,292 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2024-06-27 18:56:11,292 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 264 transitions, 3254 flow [2024-06-27 18:56:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:11,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:11,292 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 18:56:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:56:11,293 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:11,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash -862618923, now seen corresponding path program 1 times [2024-06-27 18:56:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:11,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412194430] [2024-06-27 18:56:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:14,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:14,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412194430] [2024-06-27 18:56:14,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412194430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:14,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:14,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:14,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064295020] [2024-06-27 18:56:14,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:14,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:14,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:14,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 264 transitions, 3254 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:14,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:14,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:14,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:17,221 INFO L124 PetriNetUnfolderBase]: 6765/10497 cut-off events. [2024-06-27 18:56:17,222 INFO L125 PetriNetUnfolderBase]: For 143654/143654 co-relation queries the response was YES. [2024-06-27 18:56:17,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55324 conditions, 10497 events. 6765/10497 cut-off events. For 143654/143654 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 67301 event pairs, 1322 based on Foata normal form. 2/10497 useless extension candidates. Maximal degree in co-relation 55227. Up to 9412 conditions per place. [2024-06-27 18:56:17,312 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 310 selfloop transitions, 56 changer transitions 0/373 dead transitions. [2024-06-27 18:56:17,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 373 transitions, 4674 flow [2024-06-27 18:56:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:56:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:56:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-27 18:56:17,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191489361702127 [2024-06-27 18:56:17,314 INFO L175 Difference]: Start difference. First operand has 203 places, 264 transitions, 3254 flow. Second operand 10 states and 244 transitions. [2024-06-27 18:56:17,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 373 transitions, 4674 flow [2024-06-27 18:56:17,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 373 transitions, 4594 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 18:56:17,660 INFO L231 Difference]: Finished difference. Result has 212 places, 292 transitions, 3650 flow [2024-06-27 18:56:17,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3650, PETRI_PLACES=212, PETRI_TRANSITIONS=292} [2024-06-27 18:56:17,660 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2024-06-27 18:56:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 292 transitions, 3650 flow [2024-06-27 18:56:17,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:17,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:17,661 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 18:56:17,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:56:17,661 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -853364493, now seen corresponding path program 2 times [2024-06-27 18:56:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059692224] [2024-06-27 18:56:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059692224] [2024-06-27 18:56:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059692224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:20,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:20,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149875429] [2024-06-27 18:56:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:20,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:20,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:20,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:20,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 292 transitions, 3650 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:20,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:20,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:20,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:23,625 INFO L124 PetriNetUnfolderBase]: 6886/10688 cut-off events. [2024-06-27 18:56:23,625 INFO L125 PetriNetUnfolderBase]: For 159278/159278 co-relation queries the response was YES. [2024-06-27 18:56:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58439 conditions, 10688 events. 6886/10688 cut-off events. For 159278/159278 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68637 event pairs, 1330 based on Foata normal form. 2/10688 useless extension candidates. Maximal degree in co-relation 58338. Up to 9517 conditions per place. [2024-06-27 18:56:23,736 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 317 selfloop transitions, 65 changer transitions 0/389 dead transitions. [2024-06-27 18:56:23,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 389 transitions, 5107 flow [2024-06-27 18:56:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:56:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:56:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-27 18:56:23,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067698259187621 [2024-06-27 18:56:23,739 INFO L175 Difference]: Start difference. First operand has 212 places, 292 transitions, 3650 flow. Second operand 11 states and 262 transitions. [2024-06-27 18:56:23,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 389 transitions, 5107 flow [2024-06-27 18:56:24,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 389 transitions, 4955 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 18:56:24,231 INFO L231 Difference]: Finished difference. Result has 219 places, 307 transitions, 3858 flow [2024-06-27 18:56:24,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3858, PETRI_PLACES=219, PETRI_TRANSITIONS=307} [2024-06-27 18:56:24,232 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 168 predicate places. [2024-06-27 18:56:24,232 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 307 transitions, 3858 flow [2024-06-27 18:56:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:24,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:24,232 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 18:56:24,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:56:24,233 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:24,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash -86033785, now seen corresponding path program 3 times [2024-06-27 18:56:24,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255376490] [2024-06-27 18:56:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:24,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:27,427 INFO 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 18:56:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255376490] [2024-06-27 18:56:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255376490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:27,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50305770] [2024-06-27 18:56:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:27,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:27,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 307 transitions, 3858 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:27,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:27,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:27,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:29,945 INFO L124 PetriNetUnfolderBase]: 6880/10680 cut-off events. [2024-06-27 18:56:29,945 INFO L125 PetriNetUnfolderBase]: For 161125/161125 co-relation queries the response was YES. [2024-06-27 18:56:30,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 10680 events. 6880/10680 cut-off events. For 161125/161125 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68631 event pairs, 1330 based on Foata normal form. 2/10680 useless extension candidates. Maximal degree in co-relation 58180. Up to 9512 conditions per place. [2024-06-27 18:56:30,080 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 305 selfloop transitions, 62 changer transitions 0/374 dead transitions. [2024-06-27 18:56:30,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 374 transitions, 4944 flow [2024-06-27 18:56:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:56:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:56:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 18:56:30,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2024-06-27 18:56:30,081 INFO L175 Difference]: Start difference. First operand has 219 places, 307 transitions, 3858 flow. Second operand 9 states and 218 transitions. [2024-06-27 18:56:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 374 transitions, 4944 flow [2024-06-27 18:56:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 374 transitions, 4851 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:30,596 INFO L231 Difference]: Finished difference. Result has 226 places, 307 transitions, 3898 flow [2024-06-27 18:56:30,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3898, PETRI_PLACES=226, PETRI_TRANSITIONS=307} [2024-06-27 18:56:30,597 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 175 predicate places. [2024-06-27 18:56:30,597 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 307 transitions, 3898 flow [2024-06-27 18:56:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:30,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:30,597 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 18:56:30,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:56:30,597 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:30,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1244078935, now seen corresponding path program 4 times [2024-06-27 18:56:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:30,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862480593] [2024-06-27 18:56:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:33,398 INFO 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 18:56:33,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862480593] [2024-06-27 18:56:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862480593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:33,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559534584] [2024-06-27 18:56:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:33,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:33,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:33,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 307 transitions, 3898 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:33,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:33,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:33,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:35,835 INFO L124 PetriNetUnfolderBase]: 6926/10756 cut-off events. [2024-06-27 18:56:35,835 INFO L125 PetriNetUnfolderBase]: For 168028/168028 co-relation queries the response was YES. [2024-06-27 18:56:35,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58741 conditions, 10756 events. 6926/10756 cut-off events. For 168028/168028 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 69225 event pairs, 1330 based on Foata normal form. 2/10756 useless extension candidates. Maximal degree in co-relation 58636. Up to 9554 conditions per place. [2024-06-27 18:56:35,940 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 290 selfloop transitions, 65 changer transitions 0/362 dead transitions. [2024-06-27 18:56:35,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 362 transitions, 4944 flow [2024-06-27 18:56:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:56:35,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 18:56:35,942 INFO L175 Difference]: Start difference. First operand has 226 places, 307 transitions, 3898 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:56:35,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 362 transitions, 4944 flow [2024-06-27 18:56:36,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 362 transitions, 4812 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:56:36,466 INFO L231 Difference]: Finished difference. Result has 225 places, 311 transitions, 3963 flow [2024-06-27 18:56:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3774, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3963, PETRI_PLACES=225, PETRI_TRANSITIONS=311} [2024-06-27 18:56:36,466 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2024-06-27 18:56:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 311 transitions, 3963 flow [2024-06-27 18:56:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:36,467 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 18:56:36,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:56:36,467 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:36,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1231191925, now seen corresponding path program 5 times [2024-06-27 18:56:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:36,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018910747] [2024-06-27 18:56:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:36,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:39,255 INFO 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 18:56:39,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018910747] [2024-06-27 18:56:39,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018910747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:39,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:39,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51902060] [2024-06-27 18:56:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:39,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:39,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:39,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 311 transitions, 3963 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:39,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:39,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:39,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:41,711 INFO L124 PetriNetUnfolderBase]: 6930/10749 cut-off events. [2024-06-27 18:56:41,711 INFO L125 PetriNetUnfolderBase]: For 172904/172904 co-relation queries the response was YES. [2024-06-27 18:56:41,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58862 conditions, 10749 events. 6930/10749 cut-off events. For 172904/172904 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 68938 event pairs, 1375 based on Foata normal form. 2/10745 useless extension candidates. Maximal degree in co-relation 58756. Up to 9422 conditions per place. [2024-06-27 18:56:41,840 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 306 selfloop transitions, 59 changer transitions 0/372 dead transitions. [2024-06-27 18:56:41,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 372 transitions, 5116 flow [2024-06-27 18:56:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:56:41,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:56:41,842 INFO L175 Difference]: Start difference. First operand has 225 places, 311 transitions, 3963 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:56:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 372 transitions, 5116 flow [2024-06-27 18:56:42,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 372 transitions, 5007 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:56:42,624 INFO L231 Difference]: Finished difference. Result has 229 places, 324 transitions, 4142 flow [2024-06-27 18:56:42,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4142, PETRI_PLACES=229, PETRI_TRANSITIONS=324} [2024-06-27 18:56:42,625 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 178 predicate places. [2024-06-27 18:56:42,625 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 324 transitions, 4142 flow [2024-06-27 18:56:42,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:42,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:42,626 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 18:56:42,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:56:42,626 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:42,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash -745388755, now seen corresponding path program 6 times [2024-06-27 18:56:42,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:42,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747034772] [2024-06-27 18:56:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:42,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:45,464 INFO 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 18:56:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:45,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747034772] [2024-06-27 18:56:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747034772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:45,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751369927] [2024-06-27 18:56:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:45,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:45,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 324 transitions, 4142 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:45,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:45,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:45,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:48,286 INFO L124 PetriNetUnfolderBase]: 6924/10752 cut-off events. [2024-06-27 18:56:48,286 INFO L125 PetriNetUnfolderBase]: For 172919/172919 co-relation queries the response was YES. [2024-06-27 18:56:48,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60038 conditions, 10752 events. 6924/10752 cut-off events. For 172919/172919 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69186 event pairs, 1326 based on Foata normal form. 2/10752 useless extension candidates. Maximal degree in co-relation 59930. Up to 9555 conditions per place. [2024-06-27 18:56:48,411 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 316 selfloop transitions, 72 changer transitions 0/395 dead transitions. [2024-06-27 18:56:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 395 transitions, 5194 flow [2024-06-27 18:56:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:56:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:56:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 18:56:48,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 18:56:48,412 INFO L175 Difference]: Start difference. First operand has 229 places, 324 transitions, 4142 flow. Second operand 9 states and 222 transitions. [2024-06-27 18:56:48,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 395 transitions, 5194 flow [2024-06-27 18:56:49,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 395 transitions, 5117 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:49,044 INFO L231 Difference]: Finished difference. Result has 236 places, 324 transitions, 4226 flow [2024-06-27 18:56:49,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4226, PETRI_PLACES=236, PETRI_TRANSITIONS=324} [2024-06-27 18:56:49,044 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 185 predicate places. [2024-06-27 18:56:49,045 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 324 transitions, 4226 flow [2024-06-27 18:56:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:49,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:49,045 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 18:56:49,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:56:49,045 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:49,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:49,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1112071447, now seen corresponding path program 1 times [2024-06-27 18:56:49,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:49,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387590288] [2024-06-27 18:56:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:51,301 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 18:56:51,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387590288] [2024-06-27 18:56:51,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387590288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:51,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:51,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493812944] [2024-06-27 18:56:51,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:51,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 324 transitions, 4226 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:51,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:51,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:54,026 INFO L124 PetriNetUnfolderBase]: 6960/11013 cut-off events. [2024-06-27 18:56:54,026 INFO L125 PetriNetUnfolderBase]: For 179771/179773 co-relation queries the response was YES. [2024-06-27 18:56:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60536 conditions, 11013 events. 6960/11013 cut-off events. For 179771/179773 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 72847 event pairs, 1756 based on Foata normal form. 4/11015 useless extension candidates. Maximal degree in co-relation 60426. Up to 9946 conditions per place. [2024-06-27 18:56:54,164 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 328 selfloop transitions, 35 changer transitions 0/370 dead transitions. [2024-06-27 18:56:54,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 370 transitions, 5284 flow [2024-06-27 18:56:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:56:54,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:56:54,165 INFO L175 Difference]: Start difference. First operand has 236 places, 324 transitions, 4226 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:56:54,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 370 transitions, 5284 flow [2024-06-27 18:56:54,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 370 transitions, 5126 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:56:54,695 INFO L231 Difference]: Finished difference. Result has 235 places, 332 transitions, 4285 flow [2024-06-27 18:56:54,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4285, PETRI_PLACES=235, PETRI_TRANSITIONS=332} [2024-06-27 18:56:54,696 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2024-06-27 18:56:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 332 transitions, 4285 flow [2024-06-27 18:56:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:54,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:54,696 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 18:56:54,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:56:54,696 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:54,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:54,697 INFO L85 PathProgramCache]: Analyzing trace with hash -923630983, now seen corresponding path program 2 times [2024-06-27 18:56:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:54,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803610032] [2024-06-27 18:56:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:54,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:56,975 INFO 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 18:56:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:56,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803610032] [2024-06-27 18:56:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803610032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:56,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:56,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:56,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175790689] [2024-06-27 18:56:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:57,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:57,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 332 transitions, 4285 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:56:57,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:57,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:57,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:59,296 INFO L124 PetriNetUnfolderBase]: 6996/11078 cut-off events. [2024-06-27 18:56:59,296 INFO L125 PetriNetUnfolderBase]: For 184000/184002 co-relation queries the response was YES. [2024-06-27 18:56:59,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61400 conditions, 11078 events. 6996/11078 cut-off events. For 184000/184002 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73462 event pairs, 1757 based on Foata normal form. 4/11080 useless extension candidates. Maximal degree in co-relation 61290. Up to 10011 conditions per place. [2024-06-27 18:56:59,618 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 330 selfloop transitions, 32 changer transitions 0/369 dead transitions. [2024-06-27 18:56:59,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 369 transitions, 5269 flow [2024-06-27 18:56:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:56:59,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:56:59,619 INFO L175 Difference]: Start difference. First operand has 235 places, 332 transitions, 4285 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:56:59,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 369 transitions, 5269 flow [2024-06-27 18:57:00,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 369 transitions, 5165 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:00,195 INFO L231 Difference]: Finished difference. Result has 238 places, 336 transitions, 4324 flow [2024-06-27 18:57:00,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4324, PETRI_PLACES=238, PETRI_TRANSITIONS=336} [2024-06-27 18:57:00,195 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 187 predicate places. [2024-06-27 18:57:00,196 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 336 transitions, 4324 flow [2024-06-27 18:57:00,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:00,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:00,196 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 18:57:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:57:00,196 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:00,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -923625403, now seen corresponding path program 3 times [2024-06-27 18:57:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021739578] [2024-06-27 18:57:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:00,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:02,426 INFO 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 18:57:02,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021739578] [2024-06-27 18:57:02,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021739578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:02,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:02,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:02,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065692110] [2024-06-27 18:57:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:02,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:02,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:02,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 336 transitions, 4324 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:02,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:02,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:02,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:05,042 INFO L124 PetriNetUnfolderBase]: 6990/11070 cut-off events. [2024-06-27 18:57:05,043 INFO L125 PetriNetUnfolderBase]: For 185262/185264 co-relation queries the response was YES. [2024-06-27 18:57:05,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61294 conditions, 11070 events. 6990/11070 cut-off events. For 185262/185264 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73357 event pairs, 1737 based on Foata normal form. 4/11072 useless extension candidates. Maximal degree in co-relation 61182. Up to 10006 conditions per place. [2024-06-27 18:57:05,161 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 337 selfloop transitions, 34 changer transitions 0/378 dead transitions. [2024-06-27 18:57:05,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 378 transitions, 5192 flow [2024-06-27 18:57:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 18:57:05,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920212765957447 [2024-06-27 18:57:05,163 INFO L175 Difference]: Start difference. First operand has 238 places, 336 transitions, 4324 flow. Second operand 8 states and 185 transitions. [2024-06-27 18:57:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 378 transitions, 5192 flow [2024-06-27 18:57:05,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 378 transitions, 5068 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:05,764 INFO L231 Difference]: Finished difference. Result has 242 places, 336 transitions, 4275 flow [2024-06-27 18:57:05,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4200, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4275, PETRI_PLACES=242, PETRI_TRANSITIONS=336} [2024-06-27 18:57:05,764 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-27 18:57:05,764 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 336 transitions, 4275 flow [2024-06-27 18:57:05,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:05,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:05,764 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 18:57:05,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:57:05,765 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:05,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1450436243, now seen corresponding path program 1 times [2024-06-27 18:57:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:05,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659503487] [2024-06-27 18:57:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:09,083 INFO 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 18:57:09,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:09,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659503487] [2024-06-27 18:57:09,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659503487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:09,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:09,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868222765] [2024-06-27 18:57:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:09,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:09,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 336 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:09,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:09,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:09,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:12,017 INFO L124 PetriNetUnfolderBase]: 7039/10829 cut-off events. [2024-06-27 18:57:12,018 INFO L125 PetriNetUnfolderBase]: For 187716/187716 co-relation queries the response was YES. [2024-06-27 18:57:12,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61411 conditions, 10829 events. 7039/10829 cut-off events. For 187716/187716 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 69016 event pairs, 1262 based on Foata normal form. 1/10827 useless extension candidates. Maximal degree in co-relation 61298. Up to 9601 conditions per place. [2024-06-27 18:57:12,123 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 313 selfloop transitions, 89 changer transitions 0/409 dead transitions. [2024-06-27 18:57:12,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 409 transitions, 5701 flow [2024-06-27 18:57:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:57:12,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:57:12,125 INFO L175 Difference]: Start difference. First operand has 242 places, 336 transitions, 4275 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:57:12,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 409 transitions, 5701 flow [2024-06-27 18:57:12,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 409 transitions, 5605 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:12,763 INFO L231 Difference]: Finished difference. Result has 244 places, 348 transitions, 4567 flow [2024-06-27 18:57:12,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4567, PETRI_PLACES=244, PETRI_TRANSITIONS=348} [2024-06-27 18:57:12,763 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-06-27 18:57:12,763 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 348 transitions, 4567 flow [2024-06-27 18:57:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:12,764 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 18:57:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:57:12,764 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:12,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1450556213, now seen corresponding path program 2 times [2024-06-27 18:57:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:12,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256983369] [2024-06-27 18:57:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:16,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256983369] [2024-06-27 18:57:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256983369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:16,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:16,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:16,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245899364] [2024-06-27 18:57:16,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:16,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:16,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:16,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 348 transitions, 4567 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:16,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:16,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:16,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:18,804 INFO L124 PetriNetUnfolderBase]: 7125/10985 cut-off events. [2024-06-27 18:57:18,804 INFO L125 PetriNetUnfolderBase]: For 200077/200079 co-relation queries the response was YES. [2024-06-27 18:57:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63846 conditions, 10985 events. 7125/10985 cut-off events. For 200077/200079 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70257 event pairs, 1274 based on Foata normal form. 3/10986 useless extension candidates. Maximal degree in co-relation 63731. Up to 9945 conditions per place. [2024-06-27 18:57:18,941 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 324 selfloop transitions, 85 changer transitions 0/416 dead transitions. [2024-06-27 18:57:18,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 416 transitions, 5833 flow [2024-06-27 18:57:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 18:57:18,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:57:18,942 INFO L175 Difference]: Start difference. First operand has 244 places, 348 transitions, 4567 flow. Second operand 8 states and 196 transitions. [2024-06-27 18:57:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 416 transitions, 5833 flow [2024-06-27 18:57:19,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 416 transitions, 5748 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:19,499 INFO L231 Difference]: Finished difference. Result has 250 places, 360 transitions, 4856 flow [2024-06-27 18:57:19,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4856, PETRI_PLACES=250, PETRI_TRANSITIONS=360} [2024-06-27 18:57:19,499 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 18:57:19,499 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 360 transitions, 4856 flow [2024-06-27 18:57:19,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:19,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:19,499 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 18:57:19,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:57:19,500 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:19,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1627687733, now seen corresponding path program 3 times [2024-06-27 18:57:19,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:19,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235934725] [2024-06-27 18:57:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:22,770 INFO 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 18:57:22,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235934725] [2024-06-27 18:57:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235934725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950067444] [2024-06-27 18:57:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:22,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:22,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 360 transitions, 4856 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:22,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:22,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:22,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:25,528 INFO L124 PetriNetUnfolderBase]: 7174/11074 cut-off events. [2024-06-27 18:57:25,528 INFO L125 PetriNetUnfolderBase]: For 208592/208594 co-relation queries the response was YES. [2024-06-27 18:57:25,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64885 conditions, 11074 events. 7174/11074 cut-off events. For 208592/208594 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 71021 event pairs, 1285 based on Foata normal form. 3/11075 useless extension candidates. Maximal degree in co-relation 64767. Up to 9952 conditions per place. [2024-06-27 18:57:25,670 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 325 selfloop transitions, 93 changer transitions 0/425 dead transitions. [2024-06-27 18:57:25,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 425 transitions, 6164 flow [2024-06-27 18:57:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 18:57:25,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059101654846335 [2024-06-27 18:57:25,671 INFO L175 Difference]: Start difference. First operand has 250 places, 360 transitions, 4856 flow. Second operand 9 states and 214 transitions. [2024-06-27 18:57:25,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 425 transitions, 6164 flow [2024-06-27 18:57:26,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 425 transitions, 6028 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:26,304 INFO L231 Difference]: Finished difference. Result has 256 places, 366 transitions, 5030 flow [2024-06-27 18:57:26,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5030, PETRI_PLACES=256, PETRI_TRANSITIONS=366} [2024-06-27 18:57:26,305 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-27 18:57:26,305 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 366 transitions, 5030 flow [2024-06-27 18:57:26,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:26,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:26,305 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 18:57:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:57:26,306 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:26,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash -420815121, now seen corresponding path program 1 times [2024-06-27 18:57:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:26,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761058945] [2024-06-27 18:57:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:30,003 INFO 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 18:57:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761058945] [2024-06-27 18:57:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761058945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:57:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426693444] [2024-06-27 18:57:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:57:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:57:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:57:30,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:57:30,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 366 transitions, 5030 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:57:30,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:30,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:57:30,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:32,772 INFO L124 PetriNetUnfolderBase]: 6955/10779 cut-off events. [2024-06-27 18:57:32,772 INFO L125 PetriNetUnfolderBase]: For 220646/220762 co-relation queries the response was YES. [2024-06-27 18:57:32,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63679 conditions, 10779 events. 6955/10779 cut-off events. For 220646/220762 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69545 event pairs, 1209 based on Foata normal form. 81/10815 useless extension candidates. Maximal degree in co-relation 63559. Up to 9289 conditions per place. [2024-06-27 18:57:32,901 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 277 selfloop transitions, 121 changer transitions 0/426 dead transitions. [2024-06-27 18:57:32,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 426 transitions, 6086 flow [2024-06-27 18:57:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 18:57:32,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200945626477541 [2024-06-27 18:57:32,902 INFO L175 Difference]: Start difference. First operand has 256 places, 366 transitions, 5030 flow. Second operand 9 states and 220 transitions. [2024-06-27 18:57:32,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 426 transitions, 6086 flow [2024-06-27 18:57:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 426 transitions, 5884 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:33,558 INFO L231 Difference]: Finished difference. Result has 260 places, 369 transitions, 5143 flow [2024-06-27 18:57:33,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5143, PETRI_PLACES=260, PETRI_TRANSITIONS=369} [2024-06-27 18:57:33,559 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 209 predicate places. [2024-06-27 18:57:33,559 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 369 transitions, 5143 flow [2024-06-27 18:57:33,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:57:33,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:33,559 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 18:57:33,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:57:33,560 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:33,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 450172559, now seen corresponding path program 4 times [2024-06-27 18:57:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:33,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941957506] [2024-06-27 18:57:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:36,351 INFO 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 18:57:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941957506] [2024-06-27 18:57:36,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941957506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:36,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:36,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85838626] [2024-06-27 18:57:36,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:36,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:36,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:36,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:36,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 369 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:36,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:36,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:36,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:39,009 INFO L124 PetriNetUnfolderBase]: 7299/11270 cut-off events. [2024-06-27 18:57:39,009 INFO L125 PetriNetUnfolderBase]: For 235923/235950 co-relation queries the response was YES. [2024-06-27 18:57:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67342 conditions, 11270 events. 7299/11270 cut-off events. For 235923/235950 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 72646 event pairs, 1364 based on Foata normal form. 25/11291 useless extension candidates. Maximal degree in co-relation 67221. Up to 9879 conditions per place. [2024-06-27 18:57:39,149 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 301 selfloop transitions, 113 changer transitions 0/421 dead transitions. [2024-06-27 18:57:39,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 421 transitions, 6503 flow [2024-06-27 18:57:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:57:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 18:57:39,150 INFO L175 Difference]: Start difference. First operand has 260 places, 369 transitions, 5143 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:57:39,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 421 transitions, 6503 flow [2024-06-27 18:57:40,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 421 transitions, 6222 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:40,044 INFO L231 Difference]: Finished difference. Result has 260 places, 375 transitions, 5198 flow [2024-06-27 18:57:40,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5198, PETRI_PLACES=260, PETRI_TRANSITIONS=375} [2024-06-27 18:57:40,044 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 209 predicate places. [2024-06-27 18:57:40,044 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 375 transitions, 5198 flow [2024-06-27 18:57:40,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:40,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:40,045 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 18:57:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:57:40,045 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:40,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash 461600399, now seen corresponding path program 5 times [2024-06-27 18:57:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737665745] [2024-06-27 18:57:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:42,485 INFO 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 18:57:42,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:42,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737665745] [2024-06-27 18:57:42,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737665745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:42,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:42,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860739269] [2024-06-27 18:57:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:42,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:42,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:42,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:42,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:42,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:42,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 375 transitions, 5198 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:42,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:42,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:42,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:45,298 INFO L124 PetriNetUnfolderBase]: 7353/11355 cut-off events. [2024-06-27 18:57:45,298 INFO L125 PetriNetUnfolderBase]: For 241869/241896 co-relation queries the response was YES. [2024-06-27 18:57:45,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67775 conditions, 11355 events. 7353/11355 cut-off events. For 241869/241896 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73350 event pairs, 1364 based on Foata normal form. 25/11376 useless extension candidates. Maximal degree in co-relation 67653. Up to 9934 conditions per place. [2024-06-27 18:57:45,435 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 297 selfloop transitions, 122 changer transitions 0/426 dead transitions. [2024-06-27 18:57:45,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 426 transitions, 6623 flow [2024-06-27 18:57:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:57:45,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 18:57:45,436 INFO L175 Difference]: Start difference. First operand has 260 places, 375 transitions, 5198 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:57:45,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 426 transitions, 6623 flow [2024-06-27 18:57:46,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 426 transitions, 6382 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:46,216 INFO L231 Difference]: Finished difference. Result has 265 places, 384 transitions, 5397 flow [2024-06-27 18:57:46,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4989, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5397, PETRI_PLACES=265, PETRI_TRANSITIONS=384} [2024-06-27 18:57:46,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 214 predicate places. [2024-06-27 18:57:46,217 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 384 transitions, 5397 flow [2024-06-27 18:57:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:46,221 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 18:57:46,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:57:46,221 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:46,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1677721137, now seen corresponding path program 6 times [2024-06-27 18:57:46,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:46,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592955449] [2024-06-27 18:57:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:49,144 INFO 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 18:57:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592955449] [2024-06-27 18:57:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592955449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:49,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67517090] [2024-06-27 18:57:49,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:49,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:49,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:49,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 384 transitions, 5397 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:49,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:49,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:49,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:52,029 INFO L124 PetriNetUnfolderBase]: 7350/11315 cut-off events. [2024-06-27 18:57:52,030 INFO L125 PetriNetUnfolderBase]: For 242846/242846 co-relation queries the response was YES. [2024-06-27 18:57:52,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67794 conditions, 11315 events. 7350/11315 cut-off events. For 242846/242846 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72704 event pairs, 1303 based on Foata normal form. 1/11313 useless extension candidates. Maximal degree in co-relation 67670. Up to 9931 conditions per place. [2024-06-27 18:57:52,159 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 298 selfloop transitions, 127 changer transitions 0/432 dead transitions. [2024-06-27 18:57:52,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 432 transitions, 6663 flow [2024-06-27 18:57:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:57:52,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:57:52,160 INFO L175 Difference]: Start difference. First operand has 265 places, 384 transitions, 5397 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:57:52,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 432 transitions, 6663 flow [2024-06-27 18:57:52,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 6452 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:52,920 INFO L231 Difference]: Finished difference. Result has 269 places, 384 transitions, 5450 flow [2024-06-27 18:57:52,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5186, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5450, PETRI_PLACES=269, PETRI_TRANSITIONS=384} [2024-06-27 18:57:52,921 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 218 predicate places. [2024-06-27 18:57:52,921 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 384 transitions, 5450 flow [2024-06-27 18:57:52,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:52,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:52,922 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 18:57:52,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:57:52,922 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:52,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 222391379, now seen corresponding path program 7 times [2024-06-27 18:57:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:52,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697973771] [2024-06-27 18:57:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:55,872 INFO 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 18:57:55,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:55,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697973771] [2024-06-27 18:57:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697973771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:55,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:55,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:55,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524319397] [2024-06-27 18:57:55,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:55,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:55,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:55,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:55,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 384 transitions, 5450 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:55,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:55,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:55,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:58,559 INFO L124 PetriNetUnfolderBase]: 7347/11337 cut-off events. [2024-06-27 18:57:58,560 INFO L125 PetriNetUnfolderBase]: For 245786/245788 co-relation queries the response was YES. [2024-06-27 18:57:58,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67943 conditions, 11337 events. 7347/11337 cut-off events. For 245786/245788 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 73040 event pairs, 1295 based on Foata normal form. 3/11338 useless extension candidates. Maximal degree in co-relation 67818. Up to 10192 conditions per place. [2024-06-27 18:57:58,709 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 328 selfloop transitions, 92 changer transitions 0/427 dead transitions. [2024-06-27 18:57:58,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 427 transitions, 6488 flow [2024-06-27 18:57:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:57:58,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:57:58,710 INFO L175 Difference]: Start difference. First operand has 269 places, 384 transitions, 5450 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:57:58,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 427 transitions, 6488 flow [2024-06-27 18:57:59,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 427 transitions, 6262 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:59,540 INFO L231 Difference]: Finished difference. Result has 271 places, 384 transitions, 5428 flow [2024-06-27 18:57:59,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5428, PETRI_PLACES=271, PETRI_TRANSITIONS=384} [2024-06-27 18:57:59,541 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 220 predicate places. [2024-06-27 18:57:59,541 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 384 transitions, 5428 flow [2024-06-27 18:57:59,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:57:59,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:59,542 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 18:57:59,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:57:59,542 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:59,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1432198223, now seen corresponding path program 8 times [2024-06-27 18:57:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:59,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115952651] [2024-06-27 18:57:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:59,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115952651] [2024-06-27 18:58:02,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115952651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:02,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:02,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776824301] [2024-06-27 18:58:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:02,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:02,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 384 transitions, 5428 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:02,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:02,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:04,733 INFO L124 PetriNetUnfolderBase]: 7344/11345 cut-off events. [2024-06-27 18:58:04,733 INFO L125 PetriNetUnfolderBase]: For 248857/248884 co-relation queries the response was YES. [2024-06-27 18:58:04,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67764 conditions, 11345 events. 7344/11345 cut-off events. For 248857/248884 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73352 event pairs, 1364 based on Foata normal form. 25/11366 useless extension candidates. Maximal degree in co-relation 67639. Up to 10000 conditions per place. [2024-06-27 18:58:04,864 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 307 selfloop transitions, 108 changer transitions 0/422 dead transitions. [2024-06-27 18:58:04,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 422 transitions, 6546 flow [2024-06-27 18:58:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:58:04,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:58:04,865 INFO L175 Difference]: Start difference. First operand has 271 places, 384 transitions, 5428 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:58:04,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 422 transitions, 6546 flow [2024-06-27 18:58:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 422 transitions, 6390 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:05,708 INFO L231 Difference]: Finished difference. Result has 272 places, 384 transitions, 5500 flow [2024-06-27 18:58:05,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5500, PETRI_PLACES=272, PETRI_TRANSITIONS=384} [2024-06-27 18:58:05,708 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 221 predicate places. [2024-06-27 18:58:05,708 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 384 transitions, 5500 flow [2024-06-27 18:58:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:05,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:05,708 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 18:58:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:58:05,709 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:05,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1431961073, now seen corresponding path program 9 times [2024-06-27 18:58:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033957006] [2024-06-27 18:58:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:08,463 INFO 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 18:58:08,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:08,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033957006] [2024-06-27 18:58:08,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033957006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:08,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:08,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:08,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035427776] [2024-06-27 18:58:08,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:08,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:08,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:08,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:08,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:08,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 384 transitions, 5500 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:08,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:08,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:08,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:11,542 INFO L124 PetriNetUnfolderBase]: 7338/11333 cut-off events. [2024-06-27 18:58:11,542 INFO L125 PetriNetUnfolderBase]: For 251886/251888 co-relation queries the response was YES. [2024-06-27 18:58:11,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67877 conditions, 11333 events. 7338/11333 cut-off events. For 251886/251888 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73195 event pairs, 1312 based on Foata normal form. 4/11335 useless extension candidates. Maximal degree in co-relation 67751. Up to 9994 conditions per place. [2024-06-27 18:58:11,695 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 321 selfloop transitions, 116 changer transitions 0/444 dead transitions. [2024-06-27 18:58:11,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 444 transitions, 6618 flow [2024-06-27 18:58:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:58:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:58:11,697 INFO L175 Difference]: Start difference. First operand has 272 places, 384 transitions, 5500 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:58:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 444 transitions, 6618 flow [2024-06-27 18:58:12,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 444 transitions, 6342 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:12,567 INFO L231 Difference]: Finished difference. Result has 273 places, 384 transitions, 5496 flow [2024-06-27 18:58:12,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5496, PETRI_PLACES=273, PETRI_TRANSITIONS=384} [2024-06-27 18:58:12,567 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 222 predicate places. [2024-06-27 18:58:12,567 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 384 transitions, 5496 flow [2024-06-27 18:58:12,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:12,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:12,567 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 18:58:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:58:12,567 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:12,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1262741895, now seen corresponding path program 2 times [2024-06-27 18:58:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012704796] [2024-06-27 18:58:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:16,000 INFO 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 18:58:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:16,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012704796] [2024-06-27 18:58:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012704796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:16,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408478731] [2024-06-27 18:58:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:16,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:16,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:16,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 384 transitions, 5496 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:16,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:16,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:16,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:18,656 INFO L124 PetriNetUnfolderBase]: 7124/11044 cut-off events. [2024-06-27 18:58:18,656 INFO L125 PetriNetUnfolderBase]: For 261860/262035 co-relation queries the response was YES. [2024-06-27 18:58:18,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66360 conditions, 11044 events. 7124/11044 cut-off events. For 261860/262035 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 71552 event pairs, 1240 based on Foata normal form. 152/11135 useless extension candidates. Maximal degree in co-relation 66235. Up to 9360 conditions per place. [2024-06-27 18:58:18,813 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 284 selfloop transitions, 112 changer transitions 0/424 dead transitions. [2024-06-27 18:58:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 424 transitions, 6500 flow [2024-06-27 18:58:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:58:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 18:58:18,814 INFO L175 Difference]: Start difference. First operand has 273 places, 384 transitions, 5496 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:58:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 424 transitions, 6500 flow [2024-06-27 18:58:19,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 424 transitions, 6188 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 18:58:19,589 INFO L231 Difference]: Finished difference. Result has 271 places, 386 transitions, 5452 flow [2024-06-27 18:58:19,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5452, PETRI_PLACES=271, PETRI_TRANSITIONS=386} [2024-06-27 18:58:19,596 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 220 predicate places. [2024-06-27 18:58:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 386 transitions, 5452 flow [2024-06-27 18:58:19,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:19,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:19,597 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 18:58:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:58:19,597 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:19,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash 502054825, now seen corresponding path program 3 times [2024-06-27 18:58:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949124947] [2024-06-27 18:58:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:22,845 INFO 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 18:58:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949124947] [2024-06-27 18:58:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949124947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019914251] [2024-06-27 18:58:22,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:22,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:22,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 386 transitions, 5452 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:22,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:22,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:22,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:25,466 INFO L124 PetriNetUnfolderBase]: 7190/11150 cut-off events. [2024-06-27 18:58:25,466 INFO L125 PetriNetUnfolderBase]: For 248911/249086 co-relation queries the response was YES. [2024-06-27 18:58:25,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66952 conditions, 11150 events. 7190/11150 cut-off events. For 248911/249086 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 72164 event pairs, 1250 based on Foata normal form. 152/11241 useless extension candidates. Maximal degree in co-relation 66828. Up to 9146 conditions per place. [2024-06-27 18:58:25,597 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 286 selfloop transitions, 117 changer transitions 0/431 dead transitions. [2024-06-27 18:58:25,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 431 transitions, 6668 flow [2024-06-27 18:58:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:58:25,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 18:58:25,598 INFO L175 Difference]: Start difference. First operand has 271 places, 386 transitions, 5452 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:58:25,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 431 transitions, 6668 flow [2024-06-27 18:58:26,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 431 transitions, 6428 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:26,232 INFO L231 Difference]: Finished difference. Result has 274 places, 391 transitions, 5583 flow [2024-06-27 18:58:26,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5583, PETRI_PLACES=274, PETRI_TRANSITIONS=391} [2024-06-27 18:58:26,233 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 223 predicate places. [2024-06-27 18:58:26,233 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 391 transitions, 5583 flow [2024-06-27 18:58:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:26,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:26,233 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 18:58:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:58:26,233 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:26,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash 88272715, now seen corresponding path program 4 times [2024-06-27 18:58:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645141696] [2024-06-27 18:58:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645141696] [2024-06-27 18:58:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645141696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:29,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923279022] [2024-06-27 18:58:29,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:29,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:29,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 391 transitions, 5583 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:29,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:29,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:29,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:32,372 INFO L124 PetriNetUnfolderBase]: 7177/11134 cut-off events. [2024-06-27 18:58:32,372 INFO L125 PetriNetUnfolderBase]: For 248262/248399 co-relation queries the response was YES. [2024-06-27 18:58:32,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67395 conditions, 11134 events. 7177/11134 cut-off events. For 248262/248399 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 72343 event pairs, 1251 based on Foata normal form. 96/11176 useless extension candidates. Maximal degree in co-relation 67269. Up to 9532 conditions per place. [2024-06-27 18:58:32,719 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 290 selfloop transitions, 118 changer transitions 0/436 dead transitions. [2024-06-27 18:58:32,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 436 transitions, 6611 flow [2024-06-27 18:58:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:58:32,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:58:32,720 INFO L175 Difference]: Start difference. First operand has 274 places, 391 transitions, 5583 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:58:32,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 436 transitions, 6611 flow [2024-06-27 18:58:33,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 436 transitions, 6410 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:33,428 INFO L231 Difference]: Finished difference. Result has 278 places, 394 transitions, 5714 flow [2024-06-27 18:58:33,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5714, PETRI_PLACES=278, PETRI_TRANSITIONS=394} [2024-06-27 18:58:33,428 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 227 predicate places. [2024-06-27 18:58:33,428 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 394 transitions, 5714 flow [2024-06-27 18:58:33,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 18:58:33,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:33,429 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 18:58:33,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:58:33,429 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:33,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash 111616081, now seen corresponding path program 1 times [2024-06-27 18:58:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:33,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207699242] [2024-06-27 18:58:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:33,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:35,672 INFO 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 18:58:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207699242] [2024-06-27 18:58:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207699242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281567265] [2024-06-27 18:58:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:35,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:35,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 394 transitions, 5714 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:35,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:38,255 INFO L124 PetriNetUnfolderBase]: 7526/11877 cut-off events. [2024-06-27 18:58:38,256 INFO L125 PetriNetUnfolderBase]: For 253917/253919 co-relation queries the response was YES. [2024-06-27 18:58:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70894 conditions, 11877 events. 7526/11877 cut-off events. For 253917/253919 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 79292 event pairs, 1724 based on Foata normal form. 4/11879 useless extension candidates. Maximal degree in co-relation 70766. Up to 10747 conditions per place. [2024-06-27 18:58:38,396 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 401 selfloop transitions, 32 changer transitions 0/440 dead transitions. [2024-06-27 18:58:38,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 440 transitions, 6947 flow [2024-06-27 18:58:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:58:38,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:58:38,397 INFO L175 Difference]: Start difference. First operand has 278 places, 394 transitions, 5714 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:58:38,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 440 transitions, 6947 flow [2024-06-27 18:58:39,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 440 transitions, 6695 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:39,188 INFO L231 Difference]: Finished difference. Result has 280 places, 400 transitions, 5682 flow [2024-06-27 18:58:39,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5682, PETRI_PLACES=280, PETRI_TRANSITIONS=400} [2024-06-27 18:58:39,188 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 229 predicate places. [2024-06-27 18:58:39,189 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 400 transitions, 5682 flow [2024-06-27 18:58:39,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:39,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:39,189 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 18:58:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:58:39,189 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:39,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 461609327, now seen corresponding path program 2 times [2024-06-27 18:58:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230966600] [2024-06-27 18:58:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:39,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:41,473 INFO 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 18:58:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230966600] [2024-06-27 18:58:41,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230966600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:41,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:41,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:41,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521826377] [2024-06-27 18:58:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:41,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:41,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:41,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:41,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 400 transitions, 5682 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:41,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:41,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:41,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:44,300 INFO L124 PetriNetUnfolderBase]: 7556/11919 cut-off events. [2024-06-27 18:58:44,300 INFO L125 PetriNetUnfolderBase]: For 260082/260084 co-relation queries the response was YES. [2024-06-27 18:58:44,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71048 conditions, 11919 events. 7556/11919 cut-off events. For 260082/260084 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79647 event pairs, 1818 based on Foata normal form. 4/11921 useless extension candidates. Maximal degree in co-relation 70919. Up to 10864 conditions per place. [2024-06-27 18:58:44,460 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 403 selfloop transitions, 27 changer transitions 0/437 dead transitions. [2024-06-27 18:58:44,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 437 transitions, 6721 flow [2024-06-27 18:58:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:58:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:58:44,461 INFO L175 Difference]: Start difference. First operand has 280 places, 400 transitions, 5682 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:58:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 437 transitions, 6721 flow [2024-06-27 18:58:45,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 437 transitions, 6575 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:45,371 INFO L231 Difference]: Finished difference. Result has 284 places, 403 transitions, 5680 flow [2024-06-27 18:58:45,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5680, PETRI_PLACES=284, PETRI_TRANSITIONS=403} [2024-06-27 18:58:45,372 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 233 predicate places. [2024-06-27 18:58:45,372 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 403 transitions, 5680 flow [2024-06-27 18:58:45,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:45,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:45,372 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 18:58:45,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:58:45,372 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:45,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1432207151, now seen corresponding path program 3 times [2024-06-27 18:58:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421925704] [2024-06-27 18:58:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:47,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421925704] [2024-06-27 18:58:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421925704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:47,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:47,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306453140] [2024-06-27 18:58:47,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:47,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:47,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:47,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:47,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 403 transitions, 5680 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:47,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:47,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:50,273 INFO L124 PetriNetUnfolderBase]: 7551/11912 cut-off events. [2024-06-27 18:58:50,273 INFO L125 PetriNetUnfolderBase]: For 260401/260403 co-relation queries the response was YES. [2024-06-27 18:58:50,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70662 conditions, 11912 events. 7551/11912 cut-off events. For 260401/260403 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79528 event pairs, 1723 based on Foata normal form. 4/11914 useless extension candidates. Maximal degree in co-relation 70531. Up to 10830 conditions per place. [2024-06-27 18:58:50,441 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 403 selfloop transitions, 26 changer transitions 0/436 dead transitions. [2024-06-27 18:58:50,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 436 transitions, 6637 flow [2024-06-27 18:58:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:58:50,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 18:58:50,442 INFO L175 Difference]: Start difference. First operand has 284 places, 403 transitions, 5680 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:58:50,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 436 transitions, 6637 flow [2024-06-27 18:58:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 436 transitions, 6521 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:51,656 INFO L231 Difference]: Finished difference. Result has 285 places, 403 transitions, 5626 flow [2024-06-27 18:58:51,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5626, PETRI_PLACES=285, PETRI_TRANSITIONS=403} [2024-06-27 18:58:51,656 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 234 predicate places. [2024-06-27 18:58:51,656 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 403 transitions, 5626 flow [2024-06-27 18:58:51,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 18:58:51,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:51,656 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 18:58:51,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:58:51,656 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:51,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -689048690, now seen corresponding path program 1 times [2024-06-27 18:58:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072081051] [2024-06-27 18:58:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:51,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:51,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072081051] [2024-06-27 18:58:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072081051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:51,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:51,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:58:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593477262] [2024-06-27 18:58:51,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:51,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:58:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:58:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:58:51,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-06-27 18:58:51,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 403 transitions, 5626 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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 18:58:51,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:51,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-06-27 18:58:51,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:53,195 INFO L124 PetriNetUnfolderBase]: 4457/7788 cut-off events. [2024-06-27 18:58:53,195 INFO L125 PetriNetUnfolderBase]: For 236634/237037 co-relation queries the response was YES. [2024-06-27 18:58:53,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43100 conditions, 7788 events. 4457/7788 cut-off events. For 236634/237037 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 57220 event pairs, 779 based on Foata normal form. 486/7921 useless extension candidates. Maximal degree in co-relation 42969. Up to 3222 conditions per place. [2024-06-27 18:58:53,295 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 137 selfloop transitions, 75 changer transitions 0/392 dead transitions. [2024-06-27 18:58:53,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 392 transitions, 5817 flow [2024-06-27 18:58:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:58:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:58:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 18:58:53,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:58:53,296 INFO L175 Difference]: Start difference. First operand has 285 places, 403 transitions, 5626 flow. Second operand 4 states and 120 transitions. [2024-06-27 18:58:53,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 392 transitions, 5817 flow [2024-06-27 18:58:53,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 392 transitions, 5150 flow, removed 141 selfloop flow, removed 20 redundant places. [2024-06-27 18:58:53,949 INFO L231 Difference]: Finished difference. Result has 270 places, 357 transitions, 4690 flow [2024-06-27 18:58:53,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4344, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4690, PETRI_PLACES=270, PETRI_TRANSITIONS=357} [2024-06-27 18:58:53,949 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 219 predicate places. [2024-06-27 18:58:53,950 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 357 transitions, 4690 flow [2024-06-27 18:58:53,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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 18:58:53,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:53,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:58:53,950 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:53,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:53,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2010885108, now seen corresponding path program 1 times [2024-06-27 18:58:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216138073] [2024-06-27 18:58:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:56,138 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 18:58:56,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:56,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216138073] [2024-06-27 18:58:56,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216138073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:56,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:56,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502294194] [2024-06-27 18:58:56,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:56,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:56,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:56,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 357 transitions, 4690 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:58:56,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:56,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:56,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:58,952 INFO L124 PetriNetUnfolderBase]: 6990/11205 cut-off events. [2024-06-27 18:58:58,952 INFO L125 PetriNetUnfolderBase]: For 260384/260384 co-relation queries the response was YES. [2024-06-27 18:58:59,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63711 conditions, 11205 events. 6990/11205 cut-off events. For 260384/260384 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 74366 event pairs, 2295 based on Foata normal form. 8/11211 useless extension candidates. Maximal degree in co-relation 63588. Up to 9621 conditions per place. [2024-06-27 18:58:59,091 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 372 selfloop transitions, 98 changer transitions 8/485 dead transitions. [2024-06-27 18:58:59,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 485 transitions, 6644 flow [2024-06-27 18:58:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:58:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:58:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-27 18:58:59,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486088379705401 [2024-06-27 18:58:59,092 INFO L175 Difference]: Start difference. First operand has 270 places, 357 transitions, 4690 flow. Second operand 13 states and 297 transitions. [2024-06-27 18:58:59,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 485 transitions, 6644 flow [2024-06-27 18:58:59,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 485 transitions, 6609 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:59,867 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 5473 flow [2024-06-27 18:58:59,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4666, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5473, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-27 18:58:59,867 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 232 predicate places. [2024-06-27 18:58:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 5473 flow [2024-06-27 18:58:59,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:58:59,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:59,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:59,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:58:59,868 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:59,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1654373358, now seen corresponding path program 2 times [2024-06-27 18:58:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:59,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737089948] [2024-06-27 18:58:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:03,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:03,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737089948] [2024-06-27 18:59:03,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737089948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:03,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619311138] [2024-06-27 18:59:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:03,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:03,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 5473 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:03,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:03,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:03,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:06,339 INFO L124 PetriNetUnfolderBase]: 6576/10502 cut-off events. [2024-06-27 18:59:06,339 INFO L125 PetriNetUnfolderBase]: For 272875/272875 co-relation queries the response was YES. [2024-06-27 18:59:06,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61397 conditions, 10502 events. 6576/10502 cut-off events. For 272875/272875 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 67999 event pairs, 1806 based on Foata normal form. 8/10508 useless extension candidates. Maximal degree in co-relation 61270. Up to 8710 conditions per place. [2024-06-27 18:59:06,475 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 364 selfloop transitions, 104 changer transitions 0/475 dead transitions. [2024-06-27 18:59:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 475 transitions, 7009 flow [2024-06-27 18:59:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:59:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:59:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-27 18:59:06,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47775628626692457 [2024-06-27 18:59:06,477 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 5473 flow. Second operand 11 states and 247 transitions. [2024-06-27 18:59:06,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 475 transitions, 7009 flow [2024-06-27 18:59:07,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 475 transitions, 6804 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:07,342 INFO L231 Difference]: Finished difference. Result has 290 places, 406 transitions, 5730 flow [2024-06-27 18:59:07,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5730, PETRI_PLACES=290, PETRI_TRANSITIONS=406} [2024-06-27 18:59:07,342 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-06-27 18:59:07,342 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 406 transitions, 5730 flow [2024-06-27 18:59:07,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:07,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:07,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:07,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:59:07,342 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:07,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -48386794, now seen corresponding path program 3 times [2024-06-27 18:59:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140475502] [2024-06-27 18:59:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:10,895 INFO 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 18:59:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140475502] [2024-06-27 18:59:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140475502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:10,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160385216] [2024-06-27 18:59:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:10,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:10,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 406 transitions, 5730 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:10,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:10,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:10,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:13,950 INFO L124 PetriNetUnfolderBase]: 7095/11245 cut-off events. [2024-06-27 18:59:13,951 INFO L125 PetriNetUnfolderBase]: For 317322/317322 co-relation queries the response was YES. [2024-06-27 18:59:14,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66793 conditions, 11245 events. 7095/11245 cut-off events. For 317322/317322 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 72957 event pairs, 2423 based on Foata normal form. 16/11259 useless extension candidates. Maximal degree in co-relation 66663. Up to 9685 conditions per place. [2024-06-27 18:59:14,100 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 377 selfloop transitions, 97 changer transitions 0/481 dead transitions. [2024-06-27 18:59:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 481 transitions, 7267 flow [2024-06-27 18:59:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:59:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:59:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-27 18:59:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521276595744681 [2024-06-27 18:59:14,102 INFO L175 Difference]: Start difference. First operand has 290 places, 406 transitions, 5730 flow. Second operand 12 states and 255 transitions. [2024-06-27 18:59:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 481 transitions, 7267 flow [2024-06-27 18:59:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 481 transitions, 7092 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:15,063 INFO L231 Difference]: Finished difference. Result has 297 places, 417 transitions, 5979 flow [2024-06-27 18:59:15,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5979, PETRI_PLACES=297, PETRI_TRANSITIONS=417} [2024-06-27 18:59:15,064 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 18:59:15,064 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 417 transitions, 5979 flow [2024-06-27 18:59:15,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:15,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:15,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:15,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:59:15,064 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1388349648, now seen corresponding path program 4 times [2024-06-27 18:59:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72756978] [2024-06-27 18:59:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:18,645 INFO 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 18:59:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72756978] [2024-06-27 18:59:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72756978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169805575] [2024-06-27 18:59:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:18,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:18,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:18,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 417 transitions, 5979 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:18,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:18,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:18,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:21,582 INFO L124 PetriNetUnfolderBase]: 7049/11179 cut-off events. [2024-06-27 18:59:21,582 INFO L125 PetriNetUnfolderBase]: For 299479/299479 co-relation queries the response was YES. [2024-06-27 18:59:21,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66188 conditions, 11179 events. 7049/11179 cut-off events. For 299479/299479 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 72478 event pairs, 2510 based on Foata normal form. 20/11197 useless extension candidates. Maximal degree in co-relation 66055. Up to 9927 conditions per place. [2024-06-27 18:59:21,728 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 376 selfloop transitions, 90 changer transitions 0/473 dead transitions. [2024-06-27 18:59:21,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 473 transitions, 7206 flow [2024-06-27 18:59:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:59:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:59:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 18:59:21,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-06-27 18:59:21,730 INFO L175 Difference]: Start difference. First operand has 297 places, 417 transitions, 5979 flow. Second operand 11 states and 231 transitions. [2024-06-27 18:59:21,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 473 transitions, 7206 flow [2024-06-27 18:59:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 473 transitions, 6979 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:22,665 INFO L231 Difference]: Finished difference. Result has 300 places, 419 transitions, 6001 flow [2024-06-27 18:59:22,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6001, PETRI_PLACES=300, PETRI_TRANSITIONS=419} [2024-06-27 18:59:22,665 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 249 predicate places. [2024-06-27 18:59:22,665 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 419 transitions, 6001 flow [2024-06-27 18:59:22,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:22,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:22,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:22,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 18:59:22,665 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:22,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1565835498, now seen corresponding path program 1 times [2024-06-27 18:59:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:22,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409701468] [2024-06-27 18:59:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:22,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:26,613 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 18:59:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:26,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409701468] [2024-06-27 18:59:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409701468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:26,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229458199] [2024-06-27 18:59:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:26,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:26,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 419 transitions, 6001 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:26,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:26,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:26,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:29,911 INFO L124 PetriNetUnfolderBase]: 7068/11206 cut-off events. [2024-06-27 18:59:29,911 INFO L125 PetriNetUnfolderBase]: For 273627/273627 co-relation queries the response was YES. [2024-06-27 18:59:30,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66497 conditions, 11206 events. 7068/11206 cut-off events. For 273627/273627 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 72785 event pairs, 2555 based on Foata normal form. 1/11204 useless extension candidates. Maximal degree in co-relation 66362. Up to 9840 conditions per place. [2024-06-27 18:59:30,074 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 316 selfloop transitions, 149 changer transitions 0/472 dead transitions. [2024-06-27 18:59:30,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 472 transitions, 7483 flow [2024-06-27 18:59:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 18:59:30,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:59:30,075 INFO L175 Difference]: Start difference. First operand has 300 places, 419 transitions, 6001 flow. Second operand 9 states and 207 transitions. [2024-06-27 18:59:30,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 472 transitions, 7483 flow [2024-06-27 18:59:31,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 472 transitions, 7331 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:31,098 INFO L231 Difference]: Finished difference. Result has 301 places, 428 transitions, 6303 flow [2024-06-27 18:59:31,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6303, PETRI_PLACES=301, PETRI_TRANSITIONS=428} [2024-06-27 18:59:31,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-06-27 18:59:31,099 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 428 transitions, 6303 flow [2024-06-27 18:59:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:31,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:31,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 18:59:31,099 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:31,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:31,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1565715528, now seen corresponding path program 2 times [2024-06-27 18:59:31,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:31,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7282902] [2024-06-27 18:59:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:31,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:34,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:34,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7282902] [2024-06-27 18:59:34,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7282902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:34,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:34,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:34,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185490490] [2024-06-27 18:59:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:34,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:34,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:34,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 428 transitions, 6303 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:34,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:34,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:34,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:37,988 INFO L124 PetriNetUnfolderBase]: 7084/11233 cut-off events. [2024-06-27 18:59:37,988 INFO L125 PetriNetUnfolderBase]: For 281527/281529 co-relation queries the response was YES. [2024-06-27 18:59:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66928 conditions, 11233 events. 7084/11233 cut-off events. For 281527/281529 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 72964 event pairs, 2545 based on Foata normal form. 3/11234 useless extension candidates. Maximal degree in co-relation 66792. Up to 10136 conditions per place. [2024-06-27 18:59:38,130 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 352 selfloop transitions, 113 changer transitions 0/472 dead transitions. [2024-06-27 18:59:38,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 472 transitions, 7477 flow [2024-06-27 18:59:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 18:59:38,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657210401891253 [2024-06-27 18:59:38,131 INFO L175 Difference]: Start difference. First operand has 301 places, 428 transitions, 6303 flow. Second operand 9 states and 197 transitions. [2024-06-27 18:59:38,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 472 transitions, 7477 flow [2024-06-27 18:59:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 472 transitions, 7265 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 18:59:39,051 INFO L231 Difference]: Finished difference. Result has 306 places, 434 transitions, 6415 flow [2024-06-27 18:59:39,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6415, PETRI_PLACES=306, PETRI_TRANSITIONS=434} [2024-06-27 18:59:39,051 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 255 predicate places. [2024-06-27 18:59:39,051 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 434 transitions, 6415 flow [2024-06-27 18:59:39,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:39,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:39,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:39,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 18:59:39,052 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:39,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash -225426058, now seen corresponding path program 1 times [2024-06-27 18:59:39,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108814274] [2024-06-27 18:59:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:42,473 INFO 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 18:59:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108814274] [2024-06-27 18:59:42,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108814274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:42,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:42,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232758181] [2024-06-27 18:59:42,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:42,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:42,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:42,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:42,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 434 transitions, 6415 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:42,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:42,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:42,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:45,641 INFO L124 PetriNetUnfolderBase]: 7144/11321 cut-off events. [2024-06-27 18:59:45,641 INFO L125 PetriNetUnfolderBase]: For 297925/297927 co-relation queries the response was YES. [2024-06-27 18:59:45,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68068 conditions, 11321 events. 7144/11321 cut-off events. For 297925/297927 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 73628 event pairs, 2531 based on Foata normal form. 4/11323 useless extension candidates. Maximal degree in co-relation 67930. Up to 9928 conditions per place. [2024-06-27 18:59:45,779 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 312 selfloop transitions, 174 changer transitions 0/493 dead transitions. [2024-06-27 18:59:45,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 493 transitions, 7977 flow [2024-06-27 18:59:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:59:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:59:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-27 18:59:45,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44858156028368795 [2024-06-27 18:59:45,780 INFO L175 Difference]: Start difference. First operand has 306 places, 434 transitions, 6415 flow. Second operand 12 states and 253 transitions. [2024-06-27 18:59:45,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 493 transitions, 7977 flow [2024-06-27 18:59:46,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 493 transitions, 7739 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:46,639 INFO L231 Difference]: Finished difference. Result has 312 places, 443 transitions, 6681 flow [2024-06-27 18:59:46,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6681, PETRI_PLACES=312, PETRI_TRANSITIONS=443} [2024-06-27 18:59:46,639 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-06-27 18:59:46,639 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 443 transitions, 6681 flow [2024-06-27 18:59:46,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:46,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:46,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:46,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:59:46,640 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:46,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1388346672, now seen corresponding path program 2 times [2024-06-27 18:59:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:46,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531297082] [2024-06-27 18:59:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:49,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:49,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531297082] [2024-06-27 18:59:49,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531297082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:49,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:49,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:49,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81339797] [2024-06-27 18:59:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:49,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:49,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:49,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:49,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 443 transitions, 6681 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:53,050 INFO L124 PetriNetUnfolderBase]: 7228/11448 cut-off events. [2024-06-27 18:59:53,050 INFO L125 PetriNetUnfolderBase]: For 315079/315081 co-relation queries the response was YES. [2024-06-27 18:59:53,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69726 conditions, 11448 events. 7228/11448 cut-off events. For 315079/315081 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 74546 event pairs, 2530 based on Foata normal form. 4/11450 useless extension candidates. Maximal degree in co-relation 69587. Up to 10001 conditions per place. [2024-06-27 18:59:53,182 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 321 selfloop transitions, 179 changer transitions 0/507 dead transitions. [2024-06-27 18:59:53,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 507 transitions, 8402 flow [2024-06-27 18:59:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:59:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:59:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 18:59:53,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526112185686654 [2024-06-27 18:59:53,183 INFO L175 Difference]: Start difference. First operand has 312 places, 443 transitions, 6681 flow. Second operand 11 states and 234 transitions. [2024-06-27 18:59:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 507 transitions, 8402 flow [2024-06-27 18:59:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 507 transitions, 8064 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:54,225 INFO L231 Difference]: Finished difference. Result has 316 places, 461 transitions, 6995 flow [2024-06-27 18:59:54,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6414, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6995, PETRI_PLACES=316, PETRI_TRANSITIONS=461} [2024-06-27 18:59:54,225 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-06-27 18:59:54,225 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 461 transitions, 6995 flow [2024-06-27 18:59:54,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:54,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:54,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:59:54,226 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:54,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1389773300, now seen corresponding path program 3 times [2024-06-27 18:59:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:54,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993273449] [2024-06-27 18:59:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:57,654 INFO 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 18:59:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993273449] [2024-06-27 18:59:57,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993273449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:57,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:57,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770183606] [2024-06-27 18:59:57,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:57,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:57,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 461 transitions, 6995 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 18:59:57,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:57,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:57,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:00,927 INFO L124 PetriNetUnfolderBase]: 7247/11474 cut-off events. [2024-06-27 19:00:00,928 INFO L125 PetriNetUnfolderBase]: For 321225/321227 co-relation queries the response was YES. [2024-06-27 19:00:01,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70149 conditions, 11474 events. 7247/11474 cut-off events. For 321225/321227 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 74655 event pairs, 2552 based on Foata normal form. 3/11475 useless extension candidates. Maximal degree in co-relation 70008. Up to 10339 conditions per place. [2024-06-27 19:00:01,101 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 373 selfloop transitions, 125 changer transitions 0/505 dead transitions. [2024-06-27 19:00:01,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 505 transitions, 8356 flow [2024-06-27 19:00:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:00:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:00:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:00:01,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-06-27 19:00:01,102 INFO L175 Difference]: Start difference. First operand has 316 places, 461 transitions, 6995 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:00:01,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 505 transitions, 8356 flow [2024-06-27 19:00:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 505 transitions, 8110 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:02,360 INFO L231 Difference]: Finished difference. Result has 322 places, 467 transitions, 7104 flow [2024-06-27 19:00:02,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7104, PETRI_PLACES=322, PETRI_TRANSITIONS=467} [2024-06-27 19:00:02,360 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 271 predicate places. [2024-06-27 19:00:02,360 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 467 transitions, 7104 flow [2024-06-27 19:00:02,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:02,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:02,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:00:02,361 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:02,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1388583822, now seen corresponding path program 3 times [2024-06-27 19:00:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576790440] [2024-06-27 19:00:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:05,533 INFO 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 19:00:05,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:05,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576790440] [2024-06-27 19:00:05,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576790440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:05,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782062347] [2024-06-27 19:00:05,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:05,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:05,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:05,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 467 transitions, 7104 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:05,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:05,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:05,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:08,861 INFO L124 PetriNetUnfolderBase]: 7241/11469 cut-off events. [2024-06-27 19:00:08,862 INFO L125 PetriNetUnfolderBase]: For 326525/326527 co-relation queries the response was YES. [2024-06-27 19:00:08,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70048 conditions, 11469 events. 7241/11469 cut-off events. For 326525/326527 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 74658 event pairs, 2529 based on Foata normal form. 4/11471 useless extension candidates. Maximal degree in co-relation 69905. Up to 10022 conditions per place. [2024-06-27 19:00:09,042 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 330 selfloop transitions, 181 changer transitions 0/518 dead transitions. [2024-06-27 19:00:09,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 518 transitions, 8594 flow [2024-06-27 19:00:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:00:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:00:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-27 19:00:09,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369885433715221 [2024-06-27 19:00:09,043 INFO L175 Difference]: Start difference. First operand has 322 places, 467 transitions, 7104 flow. Second operand 13 states and 267 transitions. [2024-06-27 19:00:09,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 518 transitions, 8594 flow [2024-06-27 19:00:10,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 518 transitions, 8329 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:10,135 INFO L231 Difference]: Finished difference. Result has 329 places, 467 transitions, 7207 flow [2024-06-27 19:00:10,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6839, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7207, PETRI_PLACES=329, PETRI_TRANSITIONS=467} [2024-06-27 19:00:10,136 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 278 predicate places. [2024-06-27 19:00:10,136 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 467 transitions, 7207 flow [2024-06-27 19:00:10,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:10,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:10,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:10,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:00:10,136 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:10,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1074052250, now seen corresponding path program 5 times [2024-06-27 19:00:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181701913] [2024-06-27 19:00:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181701913] [2024-06-27 19:00:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181701913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669683118] [2024-06-27 19:00:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:13,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:13,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:13,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 467 transitions, 7207 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:13,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:13,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:13,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:16,641 INFO L124 PetriNetUnfolderBase]: 7471/11794 cut-off events. [2024-06-27 19:00:16,641 INFO L125 PetriNetUnfolderBase]: For 353516/353516 co-relation queries the response was YES. [2024-06-27 19:00:16,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72143 conditions, 11794 events. 7471/11794 cut-off events. For 353516/353516 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 76727 event pairs, 2570 based on Foata normal form. 10/11802 useless extension candidates. Maximal degree in co-relation 71999. Up to 10572 conditions per place. [2024-06-27 19:00:16,805 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 428 selfloop transitions, 83 changer transitions 0/518 dead transitions. [2024-06-27 19:00:16,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 518 transitions, 8511 flow [2024-06-27 19:00:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:00:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:00:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:00:16,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-06-27 19:00:16,806 INFO L175 Difference]: Start difference. First operand has 329 places, 467 transitions, 7207 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:00:16,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 518 transitions, 8511 flow [2024-06-27 19:00:18,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 518 transitions, 8135 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 19:00:18,036 INFO L231 Difference]: Finished difference. Result has 328 places, 471 transitions, 7085 flow [2024-06-27 19:00:18,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6831, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7085, PETRI_PLACES=328, PETRI_TRANSITIONS=471} [2024-06-27 19:00:18,037 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 277 predicate places. [2024-06-27 19:00:18,037 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 471 transitions, 7085 flow [2024-06-27 19:00:18,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:18,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:18,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:18,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:00:18,038 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:18,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1085094140, now seen corresponding path program 6 times [2024-06-27 19:00:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196115573] [2024-06-27 19:00:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:21,359 INFO 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 19:00:21,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:21,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196115573] [2024-06-27 19:00:21,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196115573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:21,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477604779] [2024-06-27 19:00:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:21,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 471 transitions, 7085 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:24,729 INFO L124 PetriNetUnfolderBase]: 7701/12130 cut-off events. [2024-06-27 19:00:24,729 INFO L125 PetriNetUnfolderBase]: For 364079/364079 co-relation queries the response was YES. [2024-06-27 19:00:24,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74130 conditions, 12130 events. 7701/12130 cut-off events. For 364079/364079 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 79036 event pairs, 2667 based on Foata normal form. 10/12138 useless extension candidates. Maximal degree in co-relation 73985. Up to 10902 conditions per place. [2024-06-27 19:00:24,888 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 434 selfloop transitions, 86 changer transitions 0/527 dead transitions. [2024-06-27 19:00:24,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 527 transitions, 8431 flow [2024-06-27 19:00:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:00:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:00:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-27 19:00:24,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308510638297872 [2024-06-27 19:00:24,889 INFO L175 Difference]: Start difference. First operand has 328 places, 471 transitions, 7085 flow. Second operand 12 states and 243 transitions. [2024-06-27 19:00:24,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 527 transitions, 8431 flow [2024-06-27 19:00:26,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 527 transitions, 8254 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:00:26,119 INFO L231 Difference]: Finished difference. Result has 333 places, 475 transitions, 7176 flow [2024-06-27 19:00:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7176, PETRI_PLACES=333, PETRI_TRANSITIONS=475} [2024-06-27 19:00:26,120 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 282 predicate places. [2024-06-27 19:00:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 475 transitions, 7176 flow [2024-06-27 19:00:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:26,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:00:26,121 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:26,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1163419030, now seen corresponding path program 7 times [2024-06-27 19:00:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:26,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448280508] [2024-06-27 19:00:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:29,691 INFO 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 19:00:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448280508] [2024-06-27 19:00:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448280508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:29,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:29,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:29,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107576004] [2024-06-27 19:00:29,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:29,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 475 transitions, 7176 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:33,214 INFO L124 PetriNetUnfolderBase]: 7931/12460 cut-off events. [2024-06-27 19:00:33,214 INFO L125 PetriNetUnfolderBase]: For 371676/371676 co-relation queries the response was YES. [2024-06-27 19:00:33,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76281 conditions, 12460 events. 7931/12460 cut-off events. For 371676/371676 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 81086 event pairs, 2648 based on Foata normal form. 8/12466 useless extension candidates. Maximal degree in co-relation 76135. Up to 10796 conditions per place. [2024-06-27 19:00:33,380 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 436 selfloop transitions, 99 changer transitions 0/542 dead transitions. [2024-06-27 19:00:33,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 542 transitions, 8691 flow [2024-06-27 19:00:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:00:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:00:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-27 19:00:33,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44148936170212766 [2024-06-27 19:00:33,381 INFO L175 Difference]: Start difference. First operand has 333 places, 475 transitions, 7176 flow. Second operand 12 states and 249 transitions. [2024-06-27 19:00:33,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 542 transitions, 8691 flow [2024-06-27 19:00:34,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 542 transitions, 8510 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 19:00:34,791 INFO L231 Difference]: Finished difference. Result has 337 places, 484 transitions, 7424 flow [2024-06-27 19:00:34,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7424, PETRI_PLACES=337, PETRI_TRANSITIONS=484} [2024-06-27 19:00:34,792 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 286 predicate places. [2024-06-27 19:00:34,792 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 484 transitions, 7424 flow [2024-06-27 19:00:34,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:34,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:34,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:00:34,793 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:34,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2008306092, now seen corresponding path program 4 times [2024-06-27 19:00:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:34,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485616516] [2024-06-27 19:00:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:38,907 INFO 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 19:00:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485616516] [2024-06-27 19:00:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485616516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119547988] [2024-06-27 19:00:38,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:38,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:38,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 484 transitions, 7424 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:38,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:38,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:38,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:42,214 INFO L124 PetriNetUnfolderBase]: 7972/12525 cut-off events. [2024-06-27 19:00:42,215 INFO L125 PetriNetUnfolderBase]: For 373803/373803 co-relation queries the response was YES. [2024-06-27 19:00:42,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77449 conditions, 12525 events. 7972/12525 cut-off events. For 373803/373803 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 81540 event pairs, 2858 based on Foata normal form. 1/12523 useless extension candidates. Maximal degree in co-relation 77301. Up to 11339 conditions per place. [2024-06-27 19:00:42,389 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 410 selfloop transitions, 122 changer transitions 0/539 dead transitions. [2024-06-27 19:00:42,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 539 transitions, 9108 flow [2024-06-27 19:00:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:00:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:00:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:00:42,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799054373522459 [2024-06-27 19:00:42,390 INFO L175 Difference]: Start difference. First operand has 337 places, 484 transitions, 7424 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:00:42,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 539 transitions, 9108 flow [2024-06-27 19:00:44,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 539 transitions, 8929 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 19:00:44,185 INFO L231 Difference]: Finished difference. Result has 340 places, 496 transitions, 7691 flow [2024-06-27 19:00:44,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7245, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7691, PETRI_PLACES=340, PETRI_TRANSITIONS=496} [2024-06-27 19:00:44,185 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 289 predicate places. [2024-06-27 19:00:44,185 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 496 transitions, 7691 flow [2024-06-27 19:00:44,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:44,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:44,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:44,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:00:44,186 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:44,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:44,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2008310742, now seen corresponding path program 5 times [2024-06-27 19:00:44,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557268002] [2024-06-27 19:00:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:44,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:48,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:48,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557268002] [2024-06-27 19:00:48,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557268002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:48,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:48,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737460655] [2024-06-27 19:00:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:48,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:48,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 496 transitions, 7691 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:48,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:48,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:48,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:51,415 INFO L124 PetriNetUnfolderBase]: 7969/12523 cut-off events. [2024-06-27 19:00:51,415 INFO L125 PetriNetUnfolderBase]: For 374905/374907 co-relation queries the response was YES. [2024-06-27 19:00:51,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77357 conditions, 12523 events. 7969/12523 cut-off events. For 374905/374907 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 81557 event pairs, 2848 based on Foata normal form. 3/12524 useless extension candidates. Maximal degree in co-relation 77206. Up to 11529 conditions per place. [2024-06-27 19:00:51,599 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 442 selfloop transitions, 84 changer transitions 0/533 dead transitions. [2024-06-27 19:00:51,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 533 transitions, 8905 flow [2024-06-27 19:00:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:00:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:00:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 19:00:51,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-06-27 19:00:51,600 INFO L175 Difference]: Start difference. First operand has 340 places, 496 transitions, 7691 flow. Second operand 9 states and 192 transitions. [2024-06-27 19:00:51,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 533 transitions, 8905 flow [2024-06-27 19:00:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 533 transitions, 8753 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:53,173 INFO L231 Difference]: Finished difference. Result has 345 places, 496 transitions, 7713 flow [2024-06-27 19:00:53,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7713, PETRI_PLACES=345, PETRI_TRANSITIONS=496} [2024-06-27 19:00:53,173 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 294 predicate places. [2024-06-27 19:00:53,173 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 496 transitions, 7713 flow [2024-06-27 19:00:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:53,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:53,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:00:53,173 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:53,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2008310928, now seen corresponding path program 4 times [2024-06-27 19:00:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172398005] [2024-06-27 19:00:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:56,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:56,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172398005] [2024-06-27 19:00:56,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172398005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:56,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:56,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:00:56,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009116235] [2024-06-27 19:00:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:56,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:00:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:00:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:00:56,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:56,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 496 transitions, 7713 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:00:56,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:56,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:56,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:00,385 INFO L124 PetriNetUnfolderBase]: 8063/12644 cut-off events. [2024-06-27 19:01:00,386 INFO L125 PetriNetUnfolderBase]: For 390462/390464 co-relation queries the response was YES. [2024-06-27 19:01:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78643 conditions, 12644 events. 8063/12644 cut-off events. For 390462/390464 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 82114 event pairs, 2843 based on Foata normal form. 4/12646 useless extension candidates. Maximal degree in co-relation 78490. Up to 11488 conditions per place. [2024-06-27 19:01:00,547 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 429 selfloop transitions, 128 changer transitions 0/564 dead transitions. [2024-06-27 19:01:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 564 transitions, 9446 flow [2024-06-27 19:01:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:01:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:01:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 19:01:00,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-06-27 19:01:00,549 INFO L175 Difference]: Start difference. First operand has 345 places, 496 transitions, 7713 flow. Second operand 11 states and 231 transitions. [2024-06-27 19:01:00,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 564 transitions, 9446 flow [2024-06-27 19:01:01,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 564 transitions, 9274 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:01,956 INFO L231 Difference]: Finished difference. Result has 351 places, 517 transitions, 8118 flow [2024-06-27 19:01:01,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8118, PETRI_PLACES=351, PETRI_TRANSITIONS=517} [2024-06-27 19:01:01,957 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 300 predicate places. [2024-06-27 19:01:01,957 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 517 transitions, 8118 flow [2024-06-27 19:01:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:01,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:01:01,957 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:01,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1368127362, now seen corresponding path program 6 times [2024-06-27 19:01:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:01,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005507815] [2024-06-27 19:01:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:05,517 INFO 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 19:01:05,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005507815] [2024-06-27 19:01:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005507815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:05,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:05,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860009019] [2024-06-27 19:01:05,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:05,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:05,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 517 transitions, 8118 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:05,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:05,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:05,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:09,307 INFO L124 PetriNetUnfolderBase]: 8071/12671 cut-off events. [2024-06-27 19:01:09,307 INFO L125 PetriNetUnfolderBase]: For 396459/396459 co-relation queries the response was YES. [2024-06-27 19:01:09,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79137 conditions, 12671 events. 8071/12671 cut-off events. For 396459/396459 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 82468 event pairs, 2868 based on Foata normal form. 1/12669 useless extension candidates. Maximal degree in co-relation 78982. Up to 11475 conditions per place. [2024-06-27 19:01:09,449 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 433 selfloop transitions, 135 changer transitions 0/575 dead transitions. [2024-06-27 19:01:09,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 575 transitions, 9810 flow [2024-06-27 19:01:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:01:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:01:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-27 19:01:09,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700193423597679 [2024-06-27 19:01:09,450 INFO L175 Difference]: Start difference. First operand has 351 places, 517 transitions, 8118 flow. Second operand 11 states and 243 transitions. [2024-06-27 19:01:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 575 transitions, 9810 flow [2024-06-27 19:01:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 575 transitions, 9601 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:10,841 INFO L231 Difference]: Finished difference. Result has 356 places, 520 transitions, 8229 flow [2024-06-27 19:01:10,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8229, PETRI_PLACES=356, PETRI_TRANSITIONS=520} [2024-06-27 19:01:10,841 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 305 predicate places. [2024-06-27 19:01:10,841 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 520 transitions, 8229 flow [2024-06-27 19:01:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:10,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:10,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:01:10,842 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:10,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2013852054, now seen corresponding path program 1 times [2024-06-27 19:01:10,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:10,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529383542] [2024-06-27 19:01:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:14,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:14,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529383542] [2024-06-27 19:01:14,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529383542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:14,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:14,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:14,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119683676] [2024-06-27 19:01:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:14,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:14,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:14,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 520 transitions, 8229 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:14,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:14,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:18,016 INFO L124 PetriNetUnfolderBase]: 8131/12735 cut-off events. [2024-06-27 19:01:18,016 INFO L125 PetriNetUnfolderBase]: For 419852/419852 co-relation queries the response was YES. [2024-06-27 19:01:18,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80248 conditions, 12735 events. 8131/12735 cut-off events. For 419852/419852 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 82561 event pairs, 2857 based on Foata normal form. 2/12734 useless extension candidates. Maximal degree in co-relation 80092. Up to 11432 conditions per place. [2024-06-27 19:01:18,186 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 418 selfloop transitions, 154 changer transitions 0/579 dead transitions. [2024-06-27 19:01:18,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 579 transitions, 10040 flow [2024-06-27 19:01:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:01:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:01:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-27 19:01:18,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432624113475177 [2024-06-27 19:01:18,187 INFO L175 Difference]: Start difference. First operand has 356 places, 520 transitions, 8229 flow. Second operand 12 states and 250 transitions. [2024-06-27 19:01:18,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 579 transitions, 10040 flow [2024-06-27 19:01:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 579 transitions, 9728 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 19:01:19,786 INFO L231 Difference]: Finished difference. Result has 359 places, 529 transitions, 8405 flow [2024-06-27 19:01:19,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7917, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8405, PETRI_PLACES=359, PETRI_TRANSITIONS=529} [2024-06-27 19:01:19,787 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 308 predicate places. [2024-06-27 19:01:19,787 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 529 transitions, 8405 flow [2024-06-27 19:01:19,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:19,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:19,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:01:19,787 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:19,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2013851682, now seen corresponding path program 7 times [2024-06-27 19:01:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:19,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736433321] [2024-06-27 19:01:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:23,390 INFO 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 19:01:23,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736433321] [2024-06-27 19:01:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736433321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205626815] [2024-06-27 19:01:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:23,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:23,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 529 transitions, 8405 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:23,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:23,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:23,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:27,309 INFO L124 PetriNetUnfolderBase]: 8139/12767 cut-off events. [2024-06-27 19:01:27,309 INFO L125 PetriNetUnfolderBase]: For 426434/426434 co-relation queries the response was YES. [2024-06-27 19:01:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80639 conditions, 12767 events. 8139/12767 cut-off events. For 426434/426434 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 83033 event pairs, 2866 based on Foata normal form. 1/12765 useless extension candidates. Maximal degree in co-relation 80482. Up to 11566 conditions per place. [2024-06-27 19:01:27,468 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 437 selfloop transitions, 140 changer transitions 0/584 dead transitions. [2024-06-27 19:01:27,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 584 transitions, 9969 flow [2024-06-27 19:01:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:01:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:01:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-27 19:01:27,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44858156028368795 [2024-06-27 19:01:27,469 INFO L175 Difference]: Start difference. First operand has 359 places, 529 transitions, 8405 flow. Second operand 12 states and 253 transitions. [2024-06-27 19:01:27,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 584 transitions, 9969 flow [2024-06-27 19:01:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 584 transitions, 9724 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:29,123 INFO L231 Difference]: Finished difference. Result has 364 places, 532 transitions, 8484 flow [2024-06-27 19:01:29,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8484, PETRI_PLACES=364, PETRI_TRANSITIONS=532} [2024-06-27 19:01:29,124 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 313 predicate places. [2024-06-27 19:01:29,124 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 532 transitions, 8484 flow [2024-06-27 19:01:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:29,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:29,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:01:29,124 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:29,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:29,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2017565172, now seen corresponding path program 8 times [2024-06-27 19:01:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:29,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717088437] [2024-06-27 19:01:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:32,908 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 19:01:32,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:32,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717088437] [2024-06-27 19:01:32,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717088437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:32,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:32,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615579377] [2024-06-27 19:01:32,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:32,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:32,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:32,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:32,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 532 transitions, 8484 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:36,878 INFO L124 PetriNetUnfolderBase]: 8166/12815 cut-off events. [2024-06-27 19:01:36,878 INFO L125 PetriNetUnfolderBase]: For 436857/436859 co-relation queries the response was YES. [2024-06-27 19:01:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81276 conditions, 12815 events. 8166/12815 cut-off events. For 436857/436859 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 83458 event pairs, 2860 based on Foata normal form. 3/12816 useless extension candidates. Maximal degree in co-relation 81117. Up to 11778 conditions per place. [2024-06-27 19:01:37,054 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 483 selfloop transitions, 98 changer transitions 0/588 dead transitions. [2024-06-27 19:01:37,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 588 transitions, 10166 flow [2024-06-27 19:01:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:01:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:01:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-27 19:01:37,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42225859247135844 [2024-06-27 19:01:37,055 INFO L175 Difference]: Start difference. First operand has 364 places, 532 transitions, 8484 flow. Second operand 13 states and 258 transitions. [2024-06-27 19:01:37,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 588 transitions, 10166 flow [2024-06-27 19:01:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 588 transitions, 9887 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:01:38,898 INFO L231 Difference]: Finished difference. Result has 369 places, 541 transitions, 8579 flow [2024-06-27 19:01:38,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8579, PETRI_PLACES=369, PETRI_TRANSITIONS=541} [2024-06-27 19:01:38,898 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 318 predicate places. [2024-06-27 19:01:38,899 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 541 transitions, 8579 flow [2024-06-27 19:01:38,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:38,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:38,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:38,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:01:38,899 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:38,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -937101308, now seen corresponding path program 2 times [2024-06-27 19:01:38,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:38,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953392278] [2024-06-27 19:01:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:38,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:42,413 INFO 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 19:01:42,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953392278] [2024-06-27 19:01:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953392278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:42,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:42,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:42,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820926549] [2024-06-27 19:01:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:42,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:42,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:42,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:42,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 541 transitions, 8579 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:42,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:42,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:42,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:46,084 INFO L124 PetriNetUnfolderBase]: 8240/12911 cut-off events. [2024-06-27 19:01:46,084 INFO L125 PetriNetUnfolderBase]: For 454831/454833 co-relation queries the response was YES. [2024-06-27 19:01:46,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82091 conditions, 12911 events. 8240/12911 cut-off events. For 454831/454833 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 83937 event pairs, 2849 based on Foata normal form. 4/12913 useless extension candidates. Maximal degree in co-relation 81930. Up to 11763 conditions per place. [2024-06-27 19:01:46,308 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 465 selfloop transitions, 134 changer transitions 0/606 dead transitions. [2024-06-27 19:01:46,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 606 transitions, 10352 flow [2024-06-27 19:01:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:01:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:01:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-27 19:01:46,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42225859247135844 [2024-06-27 19:01:46,309 INFO L175 Difference]: Start difference. First operand has 369 places, 541 transitions, 8579 flow. Second operand 13 states and 258 transitions. [2024-06-27 19:01:46,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 606 transitions, 10352 flow [2024-06-27 19:01:48,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 606 transitions, 10136 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:01:48,728 INFO L231 Difference]: Finished difference. Result has 373 places, 556 transitions, 8848 flow [2024-06-27 19:01:48,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8363, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8848, PETRI_PLACES=373, PETRI_TRANSITIONS=556} [2024-06-27 19:01:48,728 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 322 predicate places. [2024-06-27 19:01:48,728 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 556 transitions, 8848 flow [2024-06-27 19:01:48,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:48,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:48,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:01:48,729 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:48,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2017565358, now seen corresponding path program 5 times [2024-06-27 19:01:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:48,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220973743] [2024-06-27 19:01:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:52,086 INFO 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 19:01:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220973743] [2024-06-27 19:01:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220973743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574435914] [2024-06-27 19:01:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:52,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:52,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 556 transitions, 8848 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:52,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:52,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:52,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:56,178 INFO L124 PetriNetUnfolderBase]: 8278/12966 cut-off events. [2024-06-27 19:01:56,178 INFO L125 PetriNetUnfolderBase]: For 470495/470497 co-relation queries the response was YES. [2024-06-27 19:01:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82846 conditions, 12966 events. 8278/12966 cut-off events. For 470495/470497 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84249 event pairs, 2848 based on Foata normal form. 4/12968 useless extension candidates. Maximal degree in co-relation 82684. Up to 11732 conditions per place. [2024-06-27 19:01:56,420 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 467 selfloop transitions, 147 changer transitions 0/621 dead transitions. [2024-06-27 19:01:56,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 621 transitions, 10714 flow [2024-06-27 19:01:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:01:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:01:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 285 transitions. [2024-06-27 19:01:56,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331306990881459 [2024-06-27 19:01:56,421 INFO L175 Difference]: Start difference. First operand has 373 places, 556 transitions, 8848 flow. Second operand 14 states and 285 transitions. [2024-06-27 19:01:56,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 621 transitions, 10714 flow [2024-06-27 19:01:58,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 621 transitions, 10537 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:01:58,975 INFO L231 Difference]: Finished difference. Result has 379 places, 562 transitions, 9053 flow [2024-06-27 19:01:58,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8671, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9053, PETRI_PLACES=379, PETRI_TRANSITIONS=562} [2024-06-27 19:01:58,976 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 328 predicate places. [2024-06-27 19:01:58,976 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 562 transitions, 9053 flow [2024-06-27 19:01:58,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:01:58,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:58,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:58,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:01:58,976 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:58,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2017576518, now seen corresponding path program 6 times [2024-06-27 19:01:58,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:58,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540782217] [2024-06-27 19:01:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:58,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:02,510 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 19:02:02,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540782217] [2024-06-27 19:02:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540782217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:02,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312555192] [2024-06-27 19:02:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:02,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:02,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:02,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:02,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 562 transitions, 9053 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:02,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:02,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:02,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:06,830 INFO L124 PetriNetUnfolderBase]: 8272/12955 cut-off events. [2024-06-27 19:02:06,830 INFO L125 PetriNetUnfolderBase]: For 474441/474443 co-relation queries the response was YES. [2024-06-27 19:02:06,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83171 conditions, 12955 events. 8272/12955 cut-off events. For 474441/474443 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 84189 event pairs, 2846 based on Foata normal form. 4/12957 useless extension candidates. Maximal degree in co-relation 83007. Up to 11727 conditions per place. [2024-06-27 19:02:06,998 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 464 selfloop transitions, 148 changer transitions 0/619 dead transitions. [2024-06-27 19:02:06,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 619 transitions, 10681 flow [2024-06-27 19:02:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:02:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:02:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-27 19:02:06,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270516717325228 [2024-06-27 19:02:06,999 INFO L175 Difference]: Start difference. First operand has 379 places, 562 transitions, 9053 flow. Second operand 14 states and 281 transitions. [2024-06-27 19:02:06,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 619 transitions, 10681 flow [2024-06-27 19:02:08,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 619 transitions, 10361 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 19:02:08,874 INFO L231 Difference]: Finished difference. Result has 382 places, 562 transitions, 9037 flow [2024-06-27 19:02:08,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8733, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9037, PETRI_PLACES=382, PETRI_TRANSITIONS=562} [2024-06-27 19:02:08,874 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 331 predicate places. [2024-06-27 19:02:08,874 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 562 transitions, 9037 flow [2024-06-27 19:02:08,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:08,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:08,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:02:08,875 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:08,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2017570752, now seen corresponding path program 9 times [2024-06-27 19:02:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80182735] [2024-06-27 19:02:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:12,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:12,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80182735] [2024-06-27 19:02:12,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80182735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:12,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949814053] [2024-06-27 19:02:12,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:12,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:12,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:12,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 562 transitions, 9037 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:12,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:12,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:12,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:16,697 INFO L124 PetriNetUnfolderBase]: 8269/12975 cut-off events. [2024-06-27 19:02:16,697 INFO L125 PetriNetUnfolderBase]: For 476597/476599 co-relation queries the response was YES. [2024-06-27 19:02:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83156 conditions, 12975 events. 8269/12975 cut-off events. For 476597/476599 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 84546 event pairs, 2870 based on Foata normal form. 3/12976 useless extension candidates. Maximal degree in co-relation 82991. Up to 11921 conditions per place. [2024-06-27 19:02:16,903 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 499 selfloop transitions, 98 changer transitions 0/604 dead transitions. [2024-06-27 19:02:16,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 604 transitions, 10423 flow [2024-06-27 19:02:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:02:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:02:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:02:16,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43520309477756286 [2024-06-27 19:02:16,904 INFO L175 Difference]: Start difference. First operand has 382 places, 562 transitions, 9037 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:02:16,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 604 transitions, 10423 flow [2024-06-27 19:02:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 604 transitions, 10111 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 19:02:19,072 INFO L231 Difference]: Finished difference. Result has 380 places, 562 transitions, 8927 flow [2024-06-27 19:02:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8725, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8927, PETRI_PLACES=380, PETRI_TRANSITIONS=562} [2024-06-27 19:02:19,073 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 329 predicate places. [2024-06-27 19:02:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 562 transitions, 8927 flow [2024-06-27 19:02:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:19,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:19,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:02:19,073 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:19,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -937106888, now seen corresponding path program 3 times [2024-06-27 19:02:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138024604] [2024-06-27 19:02:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:22,696 INFO 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 19:02:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138024604] [2024-06-27 19:02:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138024604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:22,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390056301] [2024-06-27 19:02:22,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:22,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:22,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 562 transitions, 8927 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:22,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:22,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:26,810 INFO L124 PetriNetUnfolderBase]: 8263/12949 cut-off events. [2024-06-27 19:02:26,810 INFO L125 PetriNetUnfolderBase]: For 482842/482844 co-relation queries the response was YES. [2024-06-27 19:02:26,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82816 conditions, 12949 events. 8263/12949 cut-off events. For 482842/482844 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 84225 event pairs, 2848 based on Foata normal form. 4/12951 useless extension candidates. Maximal degree in co-relation 82650. Up to 11798 conditions per place. [2024-06-27 19:02:26,996 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 468 selfloop transitions, 134 changer transitions 0/609 dead transitions. [2024-06-27 19:02:26,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 609 transitions, 10341 flow [2024-06-27 19:02:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:02:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:02:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 19:02:26,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42907801418439717 [2024-06-27 19:02:26,997 INFO L175 Difference]: Start difference. First operand has 380 places, 562 transitions, 8927 flow. Second operand 12 states and 242 transitions. [2024-06-27 19:02:26,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 609 transitions, 10341 flow [2024-06-27 19:02:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 609 transitions, 10129 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 19:02:29,505 INFO L231 Difference]: Finished difference. Result has 382 places, 562 transitions, 8989 flow [2024-06-27 19:02:29,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8715, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8989, PETRI_PLACES=382, PETRI_TRANSITIONS=562} [2024-06-27 19:02:29,505 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 331 predicate places. [2024-06-27 19:02:29,505 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 562 transitions, 8989 flow [2024-06-27 19:02:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:29,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:29,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:02:29,506 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:29,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash 266240010, now seen corresponding path program 7 times [2024-06-27 19:02:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:29,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984402664] [2024-06-27 19:02:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:33,089 INFO 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 19:02:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984402664] [2024-06-27 19:02:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984402664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:33,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582435989] [2024-06-27 19:02:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:33,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:33,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:33,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 562 transitions, 8989 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:33,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:33,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:33,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:36,487 INFO L124 PetriNetUnfolderBase]: 8413/13172 cut-off events. [2024-06-27 19:02:36,487 INFO L125 PetriNetUnfolderBase]: For 524689/524691 co-relation queries the response was YES. [2024-06-27 19:02:36,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85216 conditions, 13172 events. 8413/13172 cut-off events. For 524689/524691 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 85853 event pairs, 2803 based on Foata normal form. 4/13174 useless extension candidates. Maximal degree in co-relation 85049. Up to 11492 conditions per place. [2024-06-27 19:02:36,701 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 402 selfloop transitions, 221 changer transitions 0/630 dead transitions. [2024-06-27 19:02:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 630 transitions, 11262 flow [2024-06-27 19:02:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:02:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:02:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:02:36,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531914893617021 [2024-06-27 19:02:36,703 INFO L175 Difference]: Start difference. First operand has 382 places, 562 transitions, 8989 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:02:36,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 630 transitions, 11262 flow [2024-06-27 19:02:39,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 630 transitions, 10994 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 19:02:39,352 INFO L231 Difference]: Finished difference. Result has 381 places, 589 transitions, 9549 flow [2024-06-27 19:02:39,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8721, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9549, PETRI_PLACES=381, PETRI_TRANSITIONS=589} [2024-06-27 19:02:39,352 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 330 predicate places. [2024-06-27 19:02:39,352 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 589 transitions, 9549 flow [2024-06-27 19:02:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:02:39,353 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:39,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:39,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1081286348, now seen corresponding path program 4 times [2024-06-27 19:02:39,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:39,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696831419] [2024-06-27 19:02:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:42,776 INFO 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 19:02:42,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:42,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696831419] [2024-06-27 19:02:42,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696831419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:42,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:42,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:42,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475827741] [2024-06-27 19:02:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:42,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:42,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:42,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 589 transitions, 9549 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:47,041 INFO L124 PetriNetUnfolderBase]: 8473/13258 cut-off events. [2024-06-27 19:02:47,041 INFO L125 PetriNetUnfolderBase]: For 552013/552015 co-relation queries the response was YES. [2024-06-27 19:02:47,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86599 conditions, 13258 events. 8473/13258 cut-off events. For 552013/552015 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 86355 event pairs, 2864 based on Foata normal form. 4/13260 useless extension candidates. Maximal degree in co-relation 86431. Up to 12006 conditions per place. [2024-06-27 19:02:47,247 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 489 selfloop transitions, 148 changer transitions 0/644 dead transitions. [2024-06-27 19:02:47,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 644 transitions, 11465 flow [2024-06-27 19:02:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:02:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:02:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-27 19:02:47,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238952536824877 [2024-06-27 19:02:47,248 INFO L175 Difference]: Start difference. First operand has 381 places, 589 transitions, 9549 flow. Second operand 13 states and 259 transitions. [2024-06-27 19:02:47,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 644 transitions, 11465 flow [2024-06-27 19:02:49,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 644 transitions, 11271 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:49,883 INFO L231 Difference]: Finished difference. Result has 392 places, 598 transitions, 9818 flow [2024-06-27 19:02:49,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9355, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9818, PETRI_PLACES=392, PETRI_TRANSITIONS=598} [2024-06-27 19:02:49,883 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 341 predicate places. [2024-06-27 19:02:49,883 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 598 transitions, 9818 flow [2024-06-27 19:02:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:49,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:49,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:49,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:02:49,884 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:49,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1081292114, now seen corresponding path program 8 times [2024-06-27 19:02:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259764148] [2024-06-27 19:02:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259764148] [2024-06-27 19:02:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259764148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:53,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:53,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356334666] [2024-06-27 19:02:53,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:53,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:53,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:53,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:53,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 598 transitions, 9818 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:02:53,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:53,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:57,548 INFO L124 PetriNetUnfolderBase]: 8467/13244 cut-off events. [2024-06-27 19:02:57,549 INFO L125 PetriNetUnfolderBase]: For 558130/558132 co-relation queries the response was YES. [2024-06-27 19:02:57,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86461 conditions, 13244 events. 8467/13244 cut-off events. For 558130/558132 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 86224 event pairs, 2861 based on Foata normal form. 4/13246 useless extension candidates. Maximal degree in co-relation 86291. Up to 12074 conditions per place. [2024-06-27 19:02:57,773 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 498 selfloop transitions, 135 changer transitions 0/640 dead transitions. [2024-06-27 19:02:57,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 640 transitions, 11428 flow [2024-06-27 19:02:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:02:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:02:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-27 19:02:57,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2024-06-27 19:02:57,774 INFO L175 Difference]: Start difference. First operand has 392 places, 598 transitions, 9818 flow. Second operand 12 states and 240 transitions. [2024-06-27 19:02:57,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 640 transitions, 11428 flow [2024-06-27 19:03:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 640 transitions, 11096 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 19:03:01,069 INFO L231 Difference]: Finished difference. Result has 395 places, 598 transitions, 9762 flow [2024-06-27 19:03:01,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9486, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9762, PETRI_PLACES=395, PETRI_TRANSITIONS=598} [2024-06-27 19:03:01,069 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 344 predicate places. [2024-06-27 19:03:01,069 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 598 transitions, 9762 flow [2024-06-27 19:03:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:01,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:03:01,069 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:01,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1073929304, now seen corresponding path program 9 times [2024-06-27 19:03:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:01,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333976482] [2024-06-27 19:03:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:04,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:04,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333976482] [2024-06-27 19:03:04,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333976482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:04,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:04,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:04,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823020997] [2024-06-27 19:03:04,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:04,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:04,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:04,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:04,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 598 transitions, 9762 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:04,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:04,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:04,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:08,962 INFO L124 PetriNetUnfolderBase]: 8519/13319 cut-off events. [2024-06-27 19:03:08,962 INFO L125 PetriNetUnfolderBase]: For 568659/568661 co-relation queries the response was YES. [2024-06-27 19:03:09,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87131 conditions, 13319 events. 8519/13319 cut-off events. For 568659/568661 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 86665 event pairs, 2866 based on Foata normal form. 4/13321 useless extension candidates. Maximal degree in co-relation 86960. Up to 12153 conditions per place. [2024-06-27 19:03:09,152 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 501 selfloop transitions, 137 changer transitions 0/645 dead transitions. [2024-06-27 19:03:09,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 645 transitions, 11410 flow [2024-06-27 19:03:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:03:09,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43617021276595747 [2024-06-27 19:03:09,153 INFO L175 Difference]: Start difference. First operand has 395 places, 598 transitions, 9762 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:03:09,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 645 transitions, 11410 flow [2024-06-27 19:03:12,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 645 transitions, 11146 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:03:12,217 INFO L231 Difference]: Finished difference. Result has 397 places, 610 transitions, 10010 flow [2024-06-27 19:03:12,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9516, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10010, PETRI_PLACES=397, PETRI_TRANSITIONS=610} [2024-06-27 19:03:12,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 346 predicate places. [2024-06-27 19:03:12,217 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 610 transitions, 10010 flow [2024-06-27 19:03:12,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:12,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:12,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:12,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:03:12,218 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:12,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash 259008516, now seen corresponding path program 5 times [2024-06-27 19:03:12,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:12,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435568121] [2024-06-27 19:03:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:15,909 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 19:03:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435568121] [2024-06-27 19:03:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435568121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:15,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678022657] [2024-06-27 19:03:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:15,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:15,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 610 transitions, 10010 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:15,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:15,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:15,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:20,512 INFO L124 PetriNetUnfolderBase]: 8535/13350 cut-off events. [2024-06-27 19:03:20,512 INFO L125 PetriNetUnfolderBase]: For 579731/579733 co-relation queries the response was YES. [2024-06-27 19:03:20,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87410 conditions, 13350 events. 8535/13350 cut-off events. For 579731/579733 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 86966 event pairs, 2863 based on Foata normal form. 4/13352 useless extension candidates. Maximal degree in co-relation 87238. Up to 12056 conditions per place. [2024-06-27 19:03:20,785 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 499 selfloop transitions, 160 changer transitions 0/666 dead transitions. [2024-06-27 19:03:20,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 666 transitions, 11931 flow [2024-06-27 19:03:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 19:03:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 19:03:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-06-27 19:03:20,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156028368794326 [2024-06-27 19:03:20,786 INFO L175 Difference]: Start difference. First operand has 397 places, 610 transitions, 10010 flow. Second operand 15 states and 293 transitions. [2024-06-27 19:03:20,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 666 transitions, 11931 flow [2024-06-27 19:03:24,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 666 transitions, 11705 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:24,812 INFO L231 Difference]: Finished difference. Result has 406 places, 613 transitions, 10152 flow [2024-06-27 19:03:24,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9784, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10152, PETRI_PLACES=406, PETRI_TRANSITIONS=613} [2024-06-27 19:03:24,813 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 355 predicate places. [2024-06-27 19:03:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 613 transitions, 10152 flow [2024-06-27 19:03:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:24,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:03:24,813 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1978686582, now seen corresponding path program 10 times [2024-06-27 19:03:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393447718] [2024-06-27 19:03:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:29,027 INFO 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 19:03:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393447718] [2024-06-27 19:03:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393447718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077769867] [2024-06-27 19:03:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:29,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 613 transitions, 10152 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:29,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:29,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:29,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:33,777 INFO L124 PetriNetUnfolderBase]: 8529/13336 cut-off events. [2024-06-27 19:03:33,777 INFO L125 PetriNetUnfolderBase]: For 584413/584415 co-relation queries the response was YES. [2024-06-27 19:03:33,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87461 conditions, 13336 events. 8529/13336 cut-off events. For 584413/584415 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 86939 event pairs, 2864 based on Foata normal form. 4/13338 useless extension candidates. Maximal degree in co-relation 87288. Up to 12127 conditions per place. [2024-06-27 19:03:33,981 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 507 selfloop transitions, 147 changer transitions 0/661 dead transitions. [2024-06-27 19:03:33,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 661 transitions, 11673 flow [2024-06-27 19:03:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:03:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:03:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 273 transitions. [2024-06-27 19:03:33,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2024-06-27 19:03:33,982 INFO L175 Difference]: Start difference. First operand has 406 places, 613 transitions, 10152 flow. Second operand 14 states and 273 transitions. [2024-06-27 19:03:33,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 661 transitions, 11673 flow [2024-06-27 19:03:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 661 transitions, 11267 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-06-27 19:03:37,139 INFO L231 Difference]: Finished difference. Result has 406 places, 613 transitions, 10048 flow [2024-06-27 19:03:37,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9746, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10048, PETRI_PLACES=406, PETRI_TRANSITIONS=613} [2024-06-27 19:03:37,139 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 355 predicate places. [2024-06-27 19:03:37,139 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 613 transitions, 10048 flow [2024-06-27 19:03:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:37,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:37,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:37,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:03:37,140 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:37,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 255277914, now seen corresponding path program 10 times [2024-06-27 19:03:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656543122] [2024-06-27 19:03:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:40,786 INFO 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 19:03:40,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656543122] [2024-06-27 19:03:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656543122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:40,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789518030] [2024-06-27 19:03:40,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:40,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:40,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 613 transitions, 10048 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:40,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:40,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:40,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:45,360 INFO L124 PetriNetUnfolderBase]: 8570/13433 cut-off events. [2024-06-27 19:03:45,360 INFO L125 PetriNetUnfolderBase]: For 600295/600297 co-relation queries the response was YES. [2024-06-27 19:03:45,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88175 conditions, 13433 events. 8570/13433 cut-off events. For 600295/600297 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 87918 event pairs, 2862 based on Foata normal form. 3/13434 useless extension candidates. Maximal degree in co-relation 88001. Up to 12126 conditions per place. [2024-06-27 19:03:45,561 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 493 selfloop transitions, 161 changer transitions 0/661 dead transitions. [2024-06-27 19:03:45,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 661 transitions, 12061 flow [2024-06-27 19:03:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:03:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:03:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 19:03:45,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274661508704062 [2024-06-27 19:03:45,563 INFO L175 Difference]: Start difference. First operand has 406 places, 613 transitions, 10048 flow. Second operand 11 states and 221 transitions. [2024-06-27 19:03:45,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 661 transitions, 12061 flow [2024-06-27 19:03:48,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 661 transitions, 11761 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 19:03:48,487 INFO L231 Difference]: Finished difference. Result has 406 places, 625 transitions, 10320 flow [2024-06-27 19:03:48,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9748, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10320, PETRI_PLACES=406, PETRI_TRANSITIONS=625} [2024-06-27 19:03:48,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 355 predicate places. [2024-06-27 19:03:48,488 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 625 transitions, 10320 flow [2024-06-27 19:03:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 19:03:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:03:48,488 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:48,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash 259002564, now seen corresponding path program 11 times [2024-06-27 19:03:48,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:48,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352801566] [2024-06-27 19:03:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:48,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat