./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.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/safe002_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.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 18:48:47,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:48:47,731 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:48:47,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:48:47,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:48:47,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:48:47,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:48:47,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:48:47,766 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:48:47,770 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:48:47,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:48:47,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:48:47,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:48:47,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:48:47,773 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:48:47,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:48:47,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:48:47,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:48:47,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:48:47,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:48:47,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:48:47,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:48:47,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:48:47,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:48:47,775 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:48:47,776 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:48:47,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:48:47,776 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:48:47,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:48:47,777 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:48:47,778 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:48:47,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:48:47,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:48:47,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:48:47,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:48:47,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:48:47,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:48:47,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:48:47,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:48:47,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:48:48,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:48:48,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:48:48,014 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:48:48,014 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:48:48,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.yml/witness.yml [2024-06-27 18:48:48,214 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:48:48,215 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:48:48,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-27 18:48:49,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:48:49,559 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:48:49,562 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-27 18:48:49,581 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/586a719ff/95735edf10b444b2b5e017dca2d0ad80/FLAG8dca0d05a [2024-06-27 18:48:49,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/586a719ff/95735edf10b444b2b5e017dca2d0ad80 [2024-06-27 18:48:49,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:48:49,600 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:48:49,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:48:49,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:48:49,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:48:49,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:48" (1/2) ... [2024-06-27 18:48:49,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1558cd37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:48:49, skipping insertion in model container [2024-06-27 18:48:49,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:48" (1/2) ... [2024-06-27 18:48:49,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f12499 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:48:49, skipping insertion in model container [2024-06-27 18:48:49,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:48:49" (2/2) ... [2024-06-27 18:48:49,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1558cd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:49, skipping insertion in model container [2024-06-27 18:48:49,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:48:49" (2/2) ... [2024-06-27 18:48:49,620 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:48:49,730 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:48:49,731 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:48:49,732 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:48:49,732 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:48:49,732 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:48:49,733 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-27 18:48:49,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:48:49,915 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/safe002_rmo.oepc.i[993,1006] [2024-06-27 18:48:50,079 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:48:50,086 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:48:50,119 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/safe002_rmo.oepc.i[993,1006] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:48:50,213 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:48:50,247 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:48:50,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50 WrapperNode [2024-06-27 18:48:50,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:48:50,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:48:50,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:48:50,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:48:50,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,304 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 223 [2024-06-27 18:48:50,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:48:50,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:48:50,305 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:48:50,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:48:50,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,344 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 18:48:50,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:48:50,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:48:50,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:48:50,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:48:50,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (1/1) ... [2024-06-27 18:48:50,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:48:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:48:50,407 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 18:48:50,420 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 18:48:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:48:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:48:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:48:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:48:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:48:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:48:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:48:50,450 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:48:50,450 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:48:50,450 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:48:50,451 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:48:50,451 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:48:50,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:48:50,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:48:50,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:48:50,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:48:50,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:48:50,455 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 18:48:50,630 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:48:50,631 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:48:51,107 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:48:51,107 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:48:51,413 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:48:51,413 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:48:51,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:48:51 BoogieIcfgContainer [2024-06-27 18:48:51,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:48:51,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:48:51,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:48:51,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:48:51,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:48" (1/4) ... [2024-06-27 18:48:51,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4521331b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:48:51, skipping insertion in model container [2024-06-27 18:48:51,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:48:49" (2/4) ... [2024-06-27 18:48:51,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4521331b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:48:51, skipping insertion in model container [2024-06-27 18:48:51,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:50" (3/4) ... [2024-06-27 18:48:51,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4521331b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:48:51, skipping insertion in model container [2024-06-27 18:48:51,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:48:51" (4/4) ... [2024-06-27 18:48:51,420 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_rmo.oepc.i [2024-06-27 18:48:51,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:48:51,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:48:51,434 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:48:51,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:48:51,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:48:51,531 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:48:51,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:48:51,534 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 18:48:51,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:48:51,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:48:51,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:48:51,547 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;@7dc4c8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:48:51,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:48:51,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:48:51,551 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:48:51,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:48:51,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:51,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:48:51,552 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 18:48:51,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:51,555 INFO L85 PathProgramCache]: Analyzing trace with hash 794037418, now seen corresponding path program 1 times [2024-06-27 18:48:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159308660] [2024-06-27 18:48:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:53,213 INFO 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 18:48:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159308660] [2024-06-27 18:48:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159308660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:53,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:53,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:48:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606573950] [2024-06-27 18:48:53,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:53,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:48:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:48:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:48:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:48:53,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:53,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:53,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:48:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:54,214 INFO L124 PetriNetUnfolderBase]: 3185/4950 cut-off events. [2024-06-27 18:48:54,215 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 18:48:54,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9631 conditions, 4950 events. 3185/4950 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28805 event pairs, 1785 based on Foata normal form. 0/4767 useless extension candidates. Maximal degree in co-relation 9619. Up to 4593 conditions per place. [2024-06-27 18:48:54,242 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:48:54,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 235 flow [2024-06-27 18:48:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:48:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:48:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 18:48:54,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:48:54,254 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 90 transitions. [2024-06-27 18:48:54,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 235 flow [2024-06-27 18:48:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:48:54,261 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:48:54,262 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 18:48:54,265 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:48:54,265 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:48:54,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:54,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:54,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:48:54,266 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 18:48:54,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1434167127, now seen corresponding path program 1 times [2024-06-27 18:48:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:54,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70116533] [2024-06-27 18:48:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70116533] [2024-06-27 18:48:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70116533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:56,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:48:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142956803] [2024-06-27 18:48:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:56,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:48:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:48:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:48:56,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:48:56,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:56,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:56,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:48:56,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:57,332 INFO L124 PetriNetUnfolderBase]: 3176/4725 cut-off events. [2024-06-27 18:48:57,333 INFO L125 PetriNetUnfolderBase]: For 799/799 co-relation queries the response was YES. [2024-06-27 18:48:57,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10544 conditions, 4725 events. 3176/4725 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26723 event pairs, 1200 based on Foata normal form. 4/4724 useless extension candidates. Maximal degree in co-relation 10532. Up to 4520 conditions per place. [2024-06-27 18:48:57,354 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 64 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 18:48:57,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 367 flow [2024-06-27 18:48:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:48:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:48:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 18:48:57,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 18:48:57,358 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 122 transitions. [2024-06-27 18:48:57,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 367 flow [2024-06-27 18:48:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:48:57,361 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:48:57,362 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 18:48:57,363 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:48:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:48:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:57,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:57,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:57,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:48:57,369 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 18:48:57,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1063482183, now seen corresponding path program 1 times [2024-06-27 18:48:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:57,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388258707] [2024-06-27 18:48:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:57,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:00,003 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 18:49:00,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:00,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388258707] [2024-06-27 18:49:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388258707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:00,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:49:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390914311] [2024-06-27 18:49:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:49:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:49:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:49:00,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:00,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:00,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:00,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:00,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:01,360 INFO L124 PetriNetUnfolderBase]: 4041/5921 cut-off events. [2024-06-27 18:49:01,360 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-27 18:49:01,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14675 conditions, 5921 events. 4041/5921 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32324 event pairs, 964 based on Foata normal form. 8/5926 useless extension candidates. Maximal degree in co-relation 14660. Up to 5570 conditions per place. [2024-06-27 18:49:01,389 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 93 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2024-06-27 18:49:01,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 566 flow [2024-06-27 18:49:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:49:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:49:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 18:49:01,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 18:49:01,394 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 174 transitions. [2024-06-27 18:49:01,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 566 flow [2024-06-27 18:49:01,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:49:01,398 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:49:01,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 18:49:01,399 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:49:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:49:01,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:01,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:49:01,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:49:01,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -52420357, now seen corresponding path program 1 times [2024-06-27 18:49:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:01,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134487253] [2024-06-27 18:49:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:02,727 INFO 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 18:49:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134487253] [2024-06-27 18:49:02,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134487253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:02,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:02,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:49:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167708057] [2024-06-27 18:49:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:49:02,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:49:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:49:02,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:02,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:02,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:02,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:02,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:03,982 INFO L124 PetriNetUnfolderBase]: 4033/6190 cut-off events. [2024-06-27 18:49:03,982 INFO L125 PetriNetUnfolderBase]: For 5223/5223 co-relation queries the response was YES. [2024-06-27 18:49:03,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 6190 events. 4033/6190 cut-off events. For 5223/5223 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35479 event pairs, 1531 based on Foata normal form. 3/6190 useless extension candidates. Maximal degree in co-relation 16151. Up to 5745 conditions per place. [2024-06-27 18:49:04,019 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 67 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 18:49:04,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 486 flow [2024-06-27 18:49:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:49:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:49:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:49:04,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-27 18:49:04,021 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:49:04,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 486 flow [2024-06-27 18:49:04,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 457 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:49:04,029 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 286 flow [2024-06-27 18:49:04,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 18:49:04,031 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 18:49:04,031 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 286 flow [2024-06-27 18:49:04,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:04,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:49:04,032 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 18:49:04,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1625029858, now seen corresponding path program 1 times [2024-06-27 18:49:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789721978] [2024-06-27 18:49:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:05,638 INFO 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 18:49:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789721978] [2024-06-27 18:49:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789721978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:05,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:05,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:49:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29279811] [2024-06-27 18:49:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:05,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:49:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:49:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:49:05,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:05,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:05,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:05,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:05,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:07,149 INFO L124 PetriNetUnfolderBase]: 4023/6170 cut-off events. [2024-06-27 18:49:07,150 INFO L125 PetriNetUnfolderBase]: For 7338/7338 co-relation queries the response was YES. [2024-06-27 18:49:07,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 6170 events. 4023/6170 cut-off events. For 7338/7338 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34844 event pairs, 1651 based on Foata normal form. 4/6171 useless extension candidates. Maximal degree in co-relation 17167. Up to 5721 conditions per place. [2024-06-27 18:49:07,182 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 83 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-27 18:49:07,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 103 transitions, 622 flow [2024-06-27 18:49:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:49:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:49:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 18:49:07,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-06-27 18:49:07,257 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 286 flow. Second operand 6 states and 140 transitions. [2024-06-27 18:49:07,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 103 transitions, 622 flow [2024-06-27 18:49:07,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 581 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:49:07,262 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 382 flow [2024-06-27 18:49:07,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-27 18:49:07,263 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:49:07,263 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 382 flow [2024-06-27 18:49:07,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:07,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:07,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:49:07,263 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 18:49:07,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1157961338, now seen corresponding path program 1 times [2024-06-27 18:49:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:07,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496960545] [2024-06-27 18:49:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:07,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:09,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496960545] [2024-06-27 18:49:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496960545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:49:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14773423] [2024-06-27 18:49:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:49:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:49:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:49:09,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:09,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:09,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:09,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:09,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:11,108 INFO L124 PetriNetUnfolderBase]: 4077/5975 cut-off events. [2024-06-27 18:49:11,109 INFO L125 PetriNetUnfolderBase]: For 9919/9922 co-relation queries the response was YES. [2024-06-27 18:49:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18440 conditions, 5975 events. 4077/5975 cut-off events. For 9919/9922 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32738 event pairs, 1193 based on Foata normal form. 5/5976 useless extension candidates. Maximal degree in co-relation 18415. Up to 5639 conditions per place. [2024-06-27 18:49:11,138 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 95 selfloop transitions, 24 changer transitions 0/125 dead transitions. [2024-06-27 18:49:11,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 125 transitions, 818 flow [2024-06-27 18:49:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:49:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:49:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:49:11,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:49:11,140 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 382 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:49:11,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 125 transitions, 818 flow [2024-06-27 18:49:11,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 806 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 18:49:11,150 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 508 flow [2024-06-27 18:49:11,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 18:49:11,151 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:49:11,151 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 508 flow [2024-06-27 18:49:11,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:11,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:11,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:49:11,152 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 18:49:11,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1765155548, now seen corresponding path program 2 times [2024-06-27 18:49:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829783101] [2024-06-27 18:49:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:11,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:13,129 INFO 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 18:49:13,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:13,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829783101] [2024-06-27 18:49:13,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829783101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:13,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:13,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:49:13,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127342710] [2024-06-27 18:49:13,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:49:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:49:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:49:13,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:13,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:14,679 INFO L124 PetriNetUnfolderBase]: 4069/5965 cut-off events. [2024-06-27 18:49:14,679 INFO L125 PetriNetUnfolderBase]: For 13945/13948 co-relation queries the response was YES. [2024-06-27 18:49:14,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19922 conditions, 5965 events. 4069/5965 cut-off events. For 13945/13948 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32439 event pairs, 1196 based on Foata normal form. 5/5965 useless extension candidates. Maximal degree in co-relation 19893. Up to 5632 conditions per place. [2024-06-27 18:49:14,706 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 90 selfloop transitions, 24 changer transitions 0/120 dead transitions. [2024-06-27 18:49:14,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 848 flow [2024-06-27 18:49:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:49:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:49:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:49:14,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:49:14,708 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 508 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:49:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 848 flow [2024-06-27 18:49:14,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 832 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:49:14,720 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 550 flow [2024-06-27 18:49:14,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-27 18:49:14,720 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-06-27 18:49:14,721 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 550 flow [2024-06-27 18:49:14,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 18:49:14,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:14,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:49:14,721 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 18:49:14,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash 450066627, now seen corresponding path program 1 times [2024-06-27 18:49:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:14,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250133477] [2024-06-27 18:49:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:17,145 INFO 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 18:49:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250133477] [2024-06-27 18:49:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250133477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:17,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81954282] [2024-06-27 18:49:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:17,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:17,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 550 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:17,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:17,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:17,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:19,010 INFO L124 PetriNetUnfolderBase]: 4291/6297 cut-off events. [2024-06-27 18:49:19,010 INFO L125 PetriNetUnfolderBase]: For 15607/15609 co-relation queries the response was YES. [2024-06-27 18:49:19,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21390 conditions, 6297 events. 4291/6297 cut-off events. For 15607/15609 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 34435 event pairs, 1198 based on Foata normal form. 5/6299 useless extension candidates. Maximal degree in co-relation 21358. Up to 5882 conditions per place. [2024-06-27 18:49:19,037 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 125 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-27 18:49:19,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1156 flow [2024-06-27 18:49:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:49:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:49:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:49:19,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:49:19,039 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 550 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:49:19,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1156 flow [2024-06-27 18:49:19,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 163 transitions, 1104 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:19,053 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 726 flow [2024-06-27 18:49:19,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-06-27 18:49:19,054 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2024-06-27 18:49:19,054 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 726 flow [2024-06-27 18:49:19,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:49:19,055 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 18:49:19,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1315124987, now seen corresponding path program 2 times [2024-06-27 18:49:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378381807] [2024-06-27 18:49:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:21,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378381807] [2024-06-27 18:49:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378381807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:21,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:21,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648570363] [2024-06-27 18:49:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:21,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:21,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:21,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:21,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:23,668 INFO L124 PetriNetUnfolderBase]: 4345/6399 cut-off events. [2024-06-27 18:49:23,668 INFO L125 PetriNetUnfolderBase]: For 20501/20505 co-relation queries the response was YES. [2024-06-27 18:49:23,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23635 conditions, 6399 events. 4345/6399 cut-off events. For 20501/20505 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35359 event pairs, 1152 based on Foata normal form. 7/6403 useless extension candidates. Maximal degree in co-relation 23600. Up to 5880 conditions per place. [2024-06-27 18:49:23,704 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 123 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-27 18:49:23,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 160 transitions, 1266 flow [2024-06-27 18:49:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:49:23,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 18:49:23,706 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 726 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:49:23,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 160 transitions, 1266 flow [2024-06-27 18:49:23,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 160 transitions, 1196 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:23,726 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 765 flow [2024-06-27 18:49:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-27 18:49:23,727 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2024-06-27 18:49:23,727 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 765 flow [2024-06-27 18:49:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:23,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:23,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:49:23,728 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 18:49:23,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1730704601, now seen corresponding path program 1 times [2024-06-27 18:49:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326078132] [2024-06-27 18:49:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:26,206 INFO 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 18:49:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326078132] [2024-06-27 18:49:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326078132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:26,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959457432] [2024-06-27 18:49:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:26,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:26,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:26,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:26,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:26,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:28,122 INFO L124 PetriNetUnfolderBase]: 5041/7408 cut-off events. [2024-06-27 18:49:28,122 INFO L125 PetriNetUnfolderBase]: For 27417/27424 co-relation queries the response was YES. [2024-06-27 18:49:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27841 conditions, 7408 events. 5041/7408 cut-off events. For 27417/27424 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 41011 event pairs, 1218 based on Foata normal form. 16/7420 useless extension candidates. Maximal degree in co-relation 27806. Up to 6380 conditions per place. [2024-06-27 18:49:28,174 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 149 selfloop transitions, 44 changer transitions 0/199 dead transitions. [2024-06-27 18:49:28,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 199 transitions, 1575 flow [2024-06-27 18:49:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:49:28,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:49:28,176 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 765 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:49:28,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 199 transitions, 1575 flow [2024-06-27 18:49:28,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 199 transitions, 1512 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:28,205 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 948 flow [2024-06-27 18:49:28,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-27 18:49:28,205 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2024-06-27 18:49:28,205 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 948 flow [2024-06-27 18:49:28,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:28,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:28,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:28,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:49:28,206 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 18:49:28,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash 120254191, now seen corresponding path program 3 times [2024-06-27 18:49:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:28,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110512475] [2024-06-27 18:49:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:28,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:30,810 INFO 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 18:49:30,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:30,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110512475] [2024-06-27 18:49:30,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110512475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:30,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:30,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028657989] [2024-06-27 18:49:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:30,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:30,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:30,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 948 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:30,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:30,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:30,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:32,749 INFO L124 PetriNetUnfolderBase]: 5095/7455 cut-off events. [2024-06-27 18:49:32,750 INFO L125 PetriNetUnfolderBase]: For 38014/38019 co-relation queries the response was YES. [2024-06-27 18:49:32,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32032 conditions, 7455 events. 5095/7455 cut-off events. For 38014/38019 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 40931 event pairs, 1301 based on Foata normal form. 5/7456 useless extension candidates. Maximal degree in co-relation 31994. Up to 6644 conditions per place. [2024-06-27 18:49:32,801 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 128 selfloop transitions, 45 changer transitions 0/179 dead transitions. [2024-06-27 18:49:32,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1626 flow [2024-06-27 18:49:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:49:32,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:49:32,804 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 948 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:49:32,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1626 flow [2024-06-27 18:49:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 179 transitions, 1554 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:32,837 INFO L231 Difference]: Finished difference. Result has 97 places, 123 transitions, 1056 flow [2024-06-27 18:49:32,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1056, PETRI_PLACES=97, PETRI_TRANSITIONS=123} [2024-06-27 18:49:32,838 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-27 18:49:32,838 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 123 transitions, 1056 flow [2024-06-27 18:49:32,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:32,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:32,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:32,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:49:32,839 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 18:49:32,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1114751651, now seen corresponding path program 2 times [2024-06-27 18:49:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:32,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888625809] [2024-06-27 18:49:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:35,110 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 18:49:35,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888625809] [2024-06-27 18:49:35,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888625809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:35,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:35,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:35,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057589484] [2024-06-27 18:49:35,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:35,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:35,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:35,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:35,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 123 transitions, 1056 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:35,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:35,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:35,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:36,853 INFO L124 PetriNetUnfolderBase]: 5179/7587 cut-off events. [2024-06-27 18:49:36,853 INFO L125 PetriNetUnfolderBase]: For 43581/43590 co-relation queries the response was YES. [2024-06-27 18:49:36,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33509 conditions, 7587 events. 5179/7587 cut-off events. For 43581/43590 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 41914 event pairs, 1219 based on Foata normal form. 16/7596 useless extension candidates. Maximal degree in co-relation 33469. Up to 6837 conditions per place. [2024-06-27 18:49:36,901 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 152 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2024-06-27 18:49:36,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 196 transitions, 1785 flow [2024-06-27 18:49:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:49:36,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:49:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:49:36,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:49:36,904 INFO L175 Difference]: Start difference. First operand has 97 places, 123 transitions, 1056 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:49:36,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 196 transitions, 1785 flow [2024-06-27 18:49:36,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 196 transitions, 1739 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:49:36,946 INFO L231 Difference]: Finished difference. Result has 103 places, 132 transitions, 1206 flow [2024-06-27 18:49:36,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1206, PETRI_PLACES=103, PETRI_TRANSITIONS=132} [2024-06-27 18:49:36,947 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 52 predicate places. [2024-06-27 18:49:36,947 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 132 transitions, 1206 flow [2024-06-27 18:49:36,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:36,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:36,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:36,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:49:36,948 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 18:49:36,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1714195653, now seen corresponding path program 4 times [2024-06-27 18:49:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:36,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212894237] [2024-06-27 18:49:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:36,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:38,889 INFO 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 18:49:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212894237] [2024-06-27 18:49:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212894237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387440706] [2024-06-27 18:49:38,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:38,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:38,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 132 transitions, 1206 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:38,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:38,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:40,954 INFO L124 PetriNetUnfolderBase]: 5171/7587 cut-off events. [2024-06-27 18:49:40,955 INFO L125 PetriNetUnfolderBase]: For 49366/49374 co-relation queries the response was YES. [2024-06-27 18:49:40,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 7587 events. 5171/7587 cut-off events. For 49366/49374 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41859 event pairs, 1326 based on Foata normal form. 4/7578 useless extension candidates. Maximal degree in co-relation 34683. Up to 6751 conditions per place. [2024-06-27 18:49:41,004 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 133 selfloop transitions, 45 changer transitions 0/184 dead transitions. [2024-06-27 18:49:41,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 184 transitions, 1782 flow [2024-06-27 18:49:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:49:41,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 18:49:41,025 INFO L175 Difference]: Start difference. First operand has 103 places, 132 transitions, 1206 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:49:41,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 184 transitions, 1782 flow [2024-06-27 18:49:41,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 184 transitions, 1698 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:41,090 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1220 flow [2024-06-27 18:49:41,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-27 18:49:41,091 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-06-27 18:49:41,091 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1220 flow [2024-06-27 18:49:41,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:41,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:41,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:41,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:49:41,092 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 18:49:41,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1714432989, now seen corresponding path program 3 times [2024-06-27 18:49:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:41,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119783872] [2024-06-27 18:49:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:43,291 INFO 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 18:49:43,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119783872] [2024-06-27 18:49:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119783872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:43,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313432904] [2024-06-27 18:49:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:43,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:43,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1220 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:43,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:43,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:43,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:45,151 INFO L124 PetriNetUnfolderBase]: 5171/7556 cut-off events. [2024-06-27 18:49:45,152 INFO L125 PetriNetUnfolderBase]: For 47912/47921 co-relation queries the response was YES. [2024-06-27 18:49:45,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34899 conditions, 7556 events. 5171/7556 cut-off events. For 47912/47921 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40731 event pairs, 1308 based on Foata normal form. 10/7559 useless extension candidates. Maximal degree in co-relation 34854. Up to 7017 conditions per place. [2024-06-27 18:49:45,215 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 171 selfloop transitions, 34 changer transitions 0/211 dead transitions. [2024-06-27 18:49:45,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 211 transitions, 2079 flow [2024-06-27 18:49:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:49:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:49:45,218 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1220 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:49:45,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 211 transitions, 2079 flow [2024-06-27 18:49:45,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 211 transitions, 1937 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:49:45,287 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 1456 flow [2024-06-27 18:49:45,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1456, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2024-06-27 18:49:45,288 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-06-27 18:49:45,288 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 1456 flow [2024-06-27 18:49:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:45,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:45,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:49:45,289 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 18:49:45,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1714441917, now seen corresponding path program 1 times [2024-06-27 18:49:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:45,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274658029] [2024-06-27 18:49:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:45,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:47,658 INFO 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 18:49:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274658029] [2024-06-27 18:49:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274658029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962270850] [2024-06-27 18:49:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:47,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 1456 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:47,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:47,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:49,571 INFO L124 PetriNetUnfolderBase]: 5163/7815 cut-off events. [2024-06-27 18:49:49,571 INFO L125 PetriNetUnfolderBase]: For 53603/53605 co-relation queries the response was YES. [2024-06-27 18:49:49,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36645 conditions, 7815 events. 5163/7815 cut-off events. For 53603/53605 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 44271 event pairs, 1611 based on Foata normal form. 4/7816 useless extension candidates. Maximal degree in co-relation 36596. Up to 7237 conditions per place. [2024-06-27 18:49:49,623 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 177 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-27 18:49:49,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1998 flow [2024-06-27 18:49:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:49:49,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 18:49:49,637 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 1456 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:49:49,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1998 flow [2024-06-27 18:49:49,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 200 transitions, 1972 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 18:49:49,697 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1520 flow [2024-06-27 18:49:49,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1520, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-27 18:49:49,697 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-27 18:49:49,698 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1520 flow [2024-06-27 18:49:49,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:49,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:49,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:49,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:49:49,698 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 18:49:49,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash 400630006, now seen corresponding path program 1 times [2024-06-27 18:49:49,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:49,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898500988] [2024-06-27 18:49:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:49,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:52,819 INFO 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 18:49:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898500988] [2024-06-27 18:49:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898500988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:52,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897785287] [2024-06-27 18:49:52,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:52,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:52,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:52,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:52,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:52,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:55,318 INFO L124 PetriNetUnfolderBase]: 5607/8246 cut-off events. [2024-06-27 18:49:55,318 INFO L125 PetriNetUnfolderBase]: For 63632/63640 co-relation queries the response was YES. [2024-06-27 18:49:55,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40014 conditions, 8246 events. 5607/8246 cut-off events. For 63632/63640 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45941 event pairs, 1278 based on Foata normal form. 18/8261 useless extension candidates. Maximal degree in co-relation 39962. Up to 7200 conditions per place. [2024-06-27 18:49:55,369 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 203 selfloop transitions, 56 changer transitions 0/265 dead transitions. [2024-06-27 18:49:55,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 265 transitions, 2622 flow [2024-06-27 18:49:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:49:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:49:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:49:55,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:49:55,371 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1520 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:49:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 265 transitions, 2622 flow [2024-06-27 18:49:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 265 transitions, 2558 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:55,455 INFO L231 Difference]: Finished difference. Result has 123 places, 176 transitions, 1832 flow [2024-06-27 18:49:55,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1832, PETRI_PLACES=123, PETRI_TRANSITIONS=176} [2024-06-27 18:49:55,456 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:49:55,457 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 176 transitions, 1832 flow [2024-06-27 18:49:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:55,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:55,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:49:55,457 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 18:49:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash -567080586, now seen corresponding path program 2 times [2024-06-27 18:49:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259647862] [2024-06-27 18:49:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:58,391 INFO 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 18:49:58,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:58,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259647862] [2024-06-27 18:49:58,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259647862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:58,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:58,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359981844] [2024-06-27 18:49:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:58,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 176 transitions, 1832 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:58,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:58,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:58,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:00,845 INFO L124 PetriNetUnfolderBase]: 6479/9507 cut-off events. [2024-06-27 18:50:00,846 INFO L125 PetriNetUnfolderBase]: For 96719/96724 co-relation queries the response was YES. [2024-06-27 18:50:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50383 conditions, 9507 events. 6479/9507 cut-off events. For 96719/96724 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 53760 event pairs, 1333 based on Foata normal form. 12/9515 useless extension candidates. Maximal degree in co-relation 50328. Up to 6670 conditions per place. [2024-06-27 18:50:00,931 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 177 selfloop transitions, 111 changer transitions 0/294 dead transitions. [2024-06-27 18:50:00,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 294 transitions, 3288 flow [2024-06-27 18:50:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:50:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:50:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 18:50:00,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-27 18:50:00,933 INFO L175 Difference]: Start difference. First operand has 123 places, 176 transitions, 1832 flow. Second operand 10 states and 270 transitions. [2024-06-27 18:50:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 294 transitions, 3288 flow [2024-06-27 18:50:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 294 transitions, 3093 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:01,064 INFO L231 Difference]: Finished difference. Result has 130 places, 201 transitions, 2371 flow [2024-06-27 18:50:01,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2371, PETRI_PLACES=130, PETRI_TRANSITIONS=201} [2024-06-27 18:50:01,065 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-06-27 18:50:01,065 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 201 transitions, 2371 flow [2024-06-27 18:50:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:50:01,066 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 18:50:01,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2112239636, now seen corresponding path program 3 times [2024-06-27 18:50:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575963376] [2024-06-27 18:50:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:03,679 INFO 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 18:50:03,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575963376] [2024-06-27 18:50:03,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575963376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:03,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:03,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:03,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954023393] [2024-06-27 18:50:03,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:03,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:03,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:03,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 201 transitions, 2371 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:03,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:03,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:03,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:06,507 INFO L124 PetriNetUnfolderBase]: 6781/9915 cut-off events. [2024-06-27 18:50:06,508 INFO L125 PetriNetUnfolderBase]: For 123448/123453 co-relation queries the response was YES. [2024-06-27 18:50:06,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57421 conditions, 9915 events. 6781/9915 cut-off events. For 123448/123453 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 56060 event pairs, 1458 based on Foata normal form. 12/9923 useless extension candidates. Maximal degree in co-relation 57362. Up to 6879 conditions per place. [2024-06-27 18:50:06,587 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 196 selfloop transitions, 118 changer transitions 0/320 dead transitions. [2024-06-27 18:50:06,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 320 transitions, 3763 flow [2024-06-27 18:50:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:50:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:50:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-06-27 18:50:06,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802707930367504 [2024-06-27 18:50:06,591 INFO L175 Difference]: Start difference. First operand has 130 places, 201 transitions, 2371 flow. Second operand 11 states and 300 transitions. [2024-06-27 18:50:06,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 320 transitions, 3763 flow [2024-06-27 18:50:06,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 320 transitions, 3528 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-27 18:50:06,819 INFO L231 Difference]: Finished difference. Result has 140 places, 212 transitions, 2604 flow [2024-06-27 18:50:06,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2604, PETRI_PLACES=140, PETRI_TRANSITIONS=212} [2024-06-27 18:50:06,821 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-06-27 18:50:06,821 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 212 transitions, 2604 flow [2024-06-27 18:50:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:06,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:06,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:50:06,822 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 18:50:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -190210140, now seen corresponding path program 4 times [2024-06-27 18:50:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591998452] [2024-06-27 18:50:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:09,904 INFO 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 18:50:09,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:09,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591998452] [2024-06-27 18:50:09,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591998452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:09,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507631029] [2024-06-27 18:50:09,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:09,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:09,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:09,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:09,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 212 transitions, 2604 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:09,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:09,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:12,620 INFO L124 PetriNetUnfolderBase]: 6781/9854 cut-off events. [2024-06-27 18:50:12,620 INFO L125 PetriNetUnfolderBase]: For 116590/116601 co-relation queries the response was YES. [2024-06-27 18:50:12,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57403 conditions, 9854 events. 6781/9854 cut-off events. For 116590/116601 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 54587 event pairs, 1423 based on Foata normal form. 6/9847 useless extension candidates. Maximal degree in co-relation 57341. Up to 8713 conditions per place. [2024-06-27 18:50:12,696 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 247 selfloop transitions, 68 changer transitions 0/321 dead transitions. [2024-06-27 18:50:12,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 321 transitions, 4207 flow [2024-06-27 18:50:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:50:12,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:50:12,698 INFO L175 Difference]: Start difference. First operand has 140 places, 212 transitions, 2604 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:50:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 321 transitions, 4207 flow [2024-06-27 18:50:12,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 321 transitions, 3873 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 18:50:12,884 INFO L231 Difference]: Finished difference. Result has 144 places, 246 transitions, 3067 flow [2024-06-27 18:50:12,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3067, PETRI_PLACES=144, PETRI_TRANSITIONS=246} [2024-06-27 18:50:12,884 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:50:12,884 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 246 transitions, 3067 flow [2024-06-27 18:50:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:12,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:50:12,885 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 18:50:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 548245186, now seen corresponding path program 5 times [2024-06-27 18:50:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890601563] [2024-06-27 18:50:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:15,849 INFO 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 18:50:15,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:15,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890601563] [2024-06-27 18:50:15,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890601563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:15,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:15,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643119573] [2024-06-27 18:50:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:15,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:15,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 246 transitions, 3067 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:15,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:15,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:18,408 INFO L124 PetriNetUnfolderBase]: 7093/10344 cut-off events. [2024-06-27 18:50:18,408 INFO L125 PetriNetUnfolderBase]: For 130153/130164 co-relation queries the response was YES. [2024-06-27 18:50:18,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60640 conditions, 10344 events. 7093/10344 cut-off events. For 130153/130164 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 58193 event pairs, 1569 based on Foata normal form. 12/10343 useless extension candidates. Maximal degree in co-relation 60574. Up to 8552 conditions per place. [2024-06-27 18:50:18,492 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 225 selfloop transitions, 101 changer transitions 0/332 dead transitions. [2024-06-27 18:50:18,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 332 transitions, 4332 flow [2024-06-27 18:50:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:50:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:50:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:50:18,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:50:18,494 INFO L175 Difference]: Start difference. First operand has 144 places, 246 transitions, 3067 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:50:18,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 332 transitions, 4332 flow [2024-06-27 18:50:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 332 transitions, 4283 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 18:50:18,736 INFO L231 Difference]: Finished difference. Result has 152 places, 260 transitions, 3526 flow [2024-06-27 18:50:18,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3526, PETRI_PLACES=152, PETRI_TRANSITIONS=260} [2024-06-27 18:50:18,737 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 101 predicate places. [2024-06-27 18:50:18,737 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 260 transitions, 3526 flow [2024-06-27 18:50:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:18,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:18,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:50:18,737 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 18:50:18,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1600458900, now seen corresponding path program 6 times [2024-06-27 18:50:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:18,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004475798] [2024-06-27 18:50:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:21,730 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 18:50:21,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:21,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004475798] [2024-06-27 18:50:21,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004475798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:21,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:21,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773738098] [2024-06-27 18:50:21,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:21,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:21,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 260 transitions, 3526 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:21,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:21,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:21,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:24,507 INFO L124 PetriNetUnfolderBase]: 7073/10316 cut-off events. [2024-06-27 18:50:24,507 INFO L125 PetriNetUnfolderBase]: For 140106/140117 co-relation queries the response was YES. [2024-06-27 18:50:24,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 10316 events. 7073/10316 cut-off events. For 140106/140117 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58090 event pairs, 1588 based on Foata normal form. 12/10315 useless extension candidates. Maximal degree in co-relation 62117. Up to 8541 conditions per place. [2024-06-27 18:50:24,597 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 239 selfloop transitions, 101 changer transitions 0/346 dead transitions. [2024-06-27 18:50:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 346 transitions, 4563 flow [2024-06-27 18:50:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:50:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:50:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:50:24,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2024-06-27 18:50:24,599 INFO L175 Difference]: Start difference. First operand has 152 places, 260 transitions, 3526 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:50:24,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 346 transitions, 4563 flow [2024-06-27 18:50:24,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 346 transitions, 4211 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:24,992 INFO L231 Difference]: Finished difference. Result has 157 places, 260 transitions, 3391 flow [2024-06-27 18:50:24,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3391, PETRI_PLACES=157, PETRI_TRANSITIONS=260} [2024-06-27 18:50:24,992 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-27 18:50:24,992 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 260 transitions, 3391 flow [2024-06-27 18:50:24,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:24,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:24,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:24,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:50:24,993 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 18:50:24,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash -65271002, now seen corresponding path program 1 times [2024-06-27 18:50:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:24,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045274682] [2024-06-27 18:50:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:28,023 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 18:50:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045274682] [2024-06-27 18:50:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045274682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:28,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:28,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:28,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636195767] [2024-06-27 18:50:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:28,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:28,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 260 transitions, 3391 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:28,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:28,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:28,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:30,865 INFO L124 PetriNetUnfolderBase]: 7262/10667 cut-off events. [2024-06-27 18:50:30,866 INFO L125 PetriNetUnfolderBase]: For 140013/140021 co-relation queries the response was YES. [2024-06-27 18:50:30,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63778 conditions, 10667 events. 7262/10667 cut-off events. For 140013/140021 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61270 event pairs, 1203 based on Foata normal form. 14/10678 useless extension candidates. Maximal degree in co-relation 63706. Up to 9449 conditions per place. [2024-06-27 18:50:30,976 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 288 selfloop transitions, 56 changer transitions 0/350 dead transitions. [2024-06-27 18:50:30,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 350 transitions, 4662 flow [2024-06-27 18:50:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:50:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:50:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:50:30,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-06-27 18:50:30,978 INFO L175 Difference]: Start difference. First operand has 157 places, 260 transitions, 3391 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:50:30,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 350 transitions, 4662 flow [2024-06-27 18:50:31,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 350 transitions, 4419 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 18:50:31,294 INFO L231 Difference]: Finished difference. Result has 157 places, 264 transitions, 3371 flow [2024-06-27 18:50:31,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3371, PETRI_PLACES=157, PETRI_TRANSITIONS=264} [2024-06-27 18:50:31,295 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-27 18:50:31,295 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 264 transitions, 3371 flow [2024-06-27 18:50:31,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:31,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:31,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:31,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:50:31,296 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 18:50:31,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -465375422, now seen corresponding path program 2 times [2024-06-27 18:50:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:31,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082847183] [2024-06-27 18:50:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:33,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:33,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082847183] [2024-06-27 18:50:33,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082847183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:33,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:33,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:33,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113273269] [2024-06-27 18:50:33,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:33,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:33,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 264 transitions, 3371 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:33,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:33,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:33,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:36,430 INFO L124 PetriNetUnfolderBase]: 7249/10648 cut-off events. [2024-06-27 18:50:36,430 INFO L125 PetriNetUnfolderBase]: For 142678/142686 co-relation queries the response was YES. [2024-06-27 18:50:36,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63258 conditions, 10648 events. 7249/10648 cut-off events. For 142678/142686 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61022 event pairs, 1608 based on Foata normal form. 14/10659 useless extension candidates. Maximal degree in co-relation 63186. Up to 9705 conditions per place. [2024-06-27 18:50:36,528 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 277 selfloop transitions, 52 changer transitions 0/335 dead transitions. [2024-06-27 18:50:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 335 transitions, 4346 flow [2024-06-27 18:50:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:50:36,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 18:50:36,529 INFO L175 Difference]: Start difference. First operand has 157 places, 264 transitions, 3371 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:50:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 335 transitions, 4346 flow [2024-06-27 18:50:36,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 335 transitions, 4236 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:36,828 INFO L231 Difference]: Finished difference. Result has 160 places, 264 transitions, 3377 flow [2024-06-27 18:50:36,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3377, PETRI_PLACES=160, PETRI_TRANSITIONS=264} [2024-06-27 18:50:36,828 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:50:36,828 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 264 transitions, 3377 flow [2024-06-27 18:50:36,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:36,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:36,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:36,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:50:36,829 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 18:50:36,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -350084252, now seen corresponding path program 3 times [2024-06-27 18:50:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237858931] [2024-06-27 18:50:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:39,963 INFO 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 18:50:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237858931] [2024-06-27 18:50:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237858931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:39,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676103073] [2024-06-27 18:50:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:39,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:39,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 264 transitions, 3377 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:39,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:39,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:39,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:42,735 INFO L124 PetriNetUnfolderBase]: 7337/10711 cut-off events. [2024-06-27 18:50:42,736 INFO L125 PetriNetUnfolderBase]: For 148538/148543 co-relation queries the response was YES. [2024-06-27 18:50:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64345 conditions, 10711 events. 7337/10711 cut-off events. For 148538/148543 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 60901 event pairs, 1625 based on Foata normal form. 8/10715 useless extension candidates. Maximal degree in co-relation 64271. Up to 9613 conditions per place. [2024-06-27 18:50:42,823 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2024-06-27 18:50:42,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 332 transitions, 4393 flow [2024-06-27 18:50:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:50:42,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 18:50:42,824 INFO L175 Difference]: Start difference. First operand has 160 places, 264 transitions, 3377 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:50:42,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 332 transitions, 4393 flow [2024-06-27 18:50:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 332 transitions, 4279 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:50:43,170 INFO L231 Difference]: Finished difference. Result has 161 places, 266 transitions, 3471 flow [2024-06-27 18:50:43,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=161, PETRI_TRANSITIONS=266} [2024-06-27 18:50:43,171 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 110 predicate places. [2024-06-27 18:50:43,171 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 266 transitions, 3471 flow [2024-06-27 18:50:43,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:43,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:43,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:43,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:50:43,172 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 18:50:43,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -349899554, now seen corresponding path program 1 times [2024-06-27 18:50:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274316687] [2024-06-27 18:50:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:43,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:45,970 INFO 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 18:50:45,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:45,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274316687] [2024-06-27 18:50:45,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274316687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:45,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:45,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516315467] [2024-06-27 18:50:45,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:45,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:46,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:46,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 266 transitions, 3471 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:46,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:46,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:46,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:48,826 INFO L124 PetriNetUnfolderBase]: 7653/11077 cut-off events. [2024-06-27 18:50:48,826 INFO L125 PetriNetUnfolderBase]: For 169078/169089 co-relation queries the response was YES. [2024-06-27 18:50:48,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67158 conditions, 11077 events. 7653/11077 cut-off events. For 169078/169089 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 62375 event pairs, 1509 based on Foata normal form. 28/11101 useless extension candidates. Maximal degree in co-relation 67083. Up to 9612 conditions per place. [2024-06-27 18:50:48,937 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 291 selfloop transitions, 68 changer transitions 0/365 dead transitions. [2024-06-27 18:50:48,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 365 transitions, 4713 flow [2024-06-27 18:50:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:50:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:50:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:50:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2024-06-27 18:50:48,939 INFO L175 Difference]: Start difference. First operand has 161 places, 266 transitions, 3471 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:50:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 365 transitions, 4713 flow [2024-06-27 18:50:49,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 365 transitions, 4547 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:49,304 INFO L231 Difference]: Finished difference. Result has 165 places, 270 transitions, 3552 flow [2024-06-27 18:50:49,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3552, PETRI_PLACES=165, PETRI_TRANSITIONS=270} [2024-06-27 18:50:49,305 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-27 18:50:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 270 transitions, 3552 flow [2024-06-27 18:50:49,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:49,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:50:49,306 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 18:50:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1829624894, now seen corresponding path program 4 times [2024-06-27 18:50:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973989639] [2024-06-27 18:50:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:52,376 INFO 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 18:50:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:52,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973989639] [2024-06-27 18:50:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973989639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:52,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770962551] [2024-06-27 18:50:52,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:52,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:52,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 270 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:52,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:52,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:52,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:55,152 INFO L124 PetriNetUnfolderBase]: 7640/11233 cut-off events. [2024-06-27 18:50:55,153 INFO L125 PetriNetUnfolderBase]: For 170906/170917 co-relation queries the response was YES. [2024-06-27 18:50:55,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68371 conditions, 11233 events. 7640/11233 cut-off events. For 170906/170917 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 64821 event pairs, 1723 based on Foata normal form. 8/11228 useless extension candidates. Maximal degree in co-relation 68295. Up to 10058 conditions per place. [2024-06-27 18:50:55,262 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 72 changer transitions 0/333 dead transitions. [2024-06-27 18:50:55,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 333 transitions, 4531 flow [2024-06-27 18:50:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:50:55,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:50:55,265 INFO L175 Difference]: Start difference. First operand has 165 places, 270 transitions, 3552 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:50:55,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 333 transitions, 4531 flow [2024-06-27 18:50:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 333 transitions, 4330 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 18:50:55,679 INFO L231 Difference]: Finished difference. Result has 165 places, 272 transitions, 3567 flow [2024-06-27 18:50:55,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3567, PETRI_PLACES=165, PETRI_TRANSITIONS=272} [2024-06-27 18:50:55,680 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-27 18:50:55,680 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 272 transitions, 3567 flow [2024-06-27 18:50:55,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:55,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:55,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:50:55,681 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:50:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1697299524, now seen corresponding path program 2 times [2024-06-27 18:50:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414957506] [2024-06-27 18:50:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:59,096 INFO 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 18:50:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:59,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414957506] [2024-06-27 18:50:59,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414957506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:59,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:59,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193689112] [2024-06-27 18:50:59,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:59,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 272 transitions, 3567 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:50:59,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:59,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:59,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:01,919 INFO L124 PetriNetUnfolderBase]: 7690/11315 cut-off events. [2024-06-27 18:51:01,920 INFO L125 PetriNetUnfolderBase]: For 177976/177997 co-relation queries the response was YES. [2024-06-27 18:51:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68383 conditions, 11315 events. 7690/11315 cut-off events. For 177976/177997 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 65310 event pairs, 1526 based on Foata normal form. 18/11326 useless extension candidates. Maximal degree in co-relation 68306. Up to 10454 conditions per place. [2024-06-27 18:51:02,029 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 301 selfloop transitions, 36 changer transitions 0/343 dead transitions. [2024-06-27 18:51:02,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 343 transitions, 4598 flow [2024-06-27 18:51:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:51:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:51:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:51:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 18:51:02,031 INFO L175 Difference]: Start difference. First operand has 165 places, 272 transitions, 3567 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:51:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 343 transitions, 4598 flow [2024-06-27 18:51:02,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 343 transitions, 4424 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:51:02,379 INFO L231 Difference]: Finished difference. Result has 167 places, 274 transitions, 3514 flow [2024-06-27 18:51:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3514, PETRI_PLACES=167, PETRI_TRANSITIONS=274} [2024-06-27 18:51:02,380 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 18:51:02,380 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 274 transitions, 3514 flow [2024-06-27 18:51:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:02,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:02,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:51:02,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:51:02,380 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 18:51:02,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash 828649896, now seen corresponding path program 3 times [2024-06-27 18:51:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381332165] [2024-06-27 18:51:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:05,526 INFO 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 18:51:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381332165] [2024-06-27 18:51:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381332165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906624074] [2024-06-27 18:51:05,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:05,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:05,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 274 transitions, 3514 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:05,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:05,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:05,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:08,809 INFO L124 PetriNetUnfolderBase]: 8006/11723 cut-off events. [2024-06-27 18:51:08,809 INFO L125 PetriNetUnfolderBase]: For 194768/194789 co-relation queries the response was YES. [2024-06-27 18:51:08,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70962 conditions, 11723 events. 8006/11723 cut-off events. For 194768/194789 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 67428 event pairs, 1634 based on Foata normal form. 32/11748 useless extension candidates. Maximal degree in co-relation 70884. Up to 10449 conditions per place. [2024-06-27 18:51:08,907 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 296 selfloop transitions, 54 changer transitions 0/356 dead transitions. [2024-06-27 18:51:08,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 356 transitions, 4656 flow [2024-06-27 18:51:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:51:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:51:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:51:08,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-27 18:51:08,909 INFO L175 Difference]: Start difference. First operand has 167 places, 274 transitions, 3514 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:51:08,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 356 transitions, 4656 flow [2024-06-27 18:51:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 356 transitions, 4569 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:51:09,247 INFO L231 Difference]: Finished difference. Result has 170 places, 278 transitions, 3662 flow [2024-06-27 18:51:09,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3662, PETRI_PLACES=170, PETRI_TRANSITIONS=278} [2024-06-27 18:51:09,251 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 119 predicate places. [2024-06-27 18:51:09,251 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 278 transitions, 3662 flow [2024-06-27 18:51:09,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:09,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:09,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:51:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:51:09,252 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 18:51:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1688728644, now seen corresponding path program 4 times [2024-06-27 18:51:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913539251] [2024-06-27 18:51:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:12,001 INFO 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 18:51:12,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913539251] [2024-06-27 18:51:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913539251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:12,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:12,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:51:12,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220307748] [2024-06-27 18:51:12,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:51:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:51:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:51:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 278 transitions, 3662 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:51:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:14,912 INFO L124 PetriNetUnfolderBase]: 8006/11799 cut-off events. [2024-06-27 18:51:14,913 INFO L125 PetriNetUnfolderBase]: For 200837/200858 co-relation queries the response was YES. [2024-06-27 18:51:14,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72384 conditions, 11799 events. 8006/11799 cut-off events. For 200837/200858 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68514 event pairs, 1520 based on Foata normal form. 18/11810 useless extension candidates. Maximal degree in co-relation 72305. Up to 10716 conditions per place. [2024-06-27 18:51:15,029 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 306 selfloop transitions, 45 changer transitions 0/357 dead transitions. [2024-06-27 18:51:15,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 357 transitions, 4887 flow [2024-06-27 18:51:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:51:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:51:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:51:15,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 18:51:15,031 INFO L175 Difference]: Start difference. First operand has 170 places, 278 transitions, 3662 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:51:15,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 357 transitions, 4887 flow [2024-06-27 18:51:15,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 357 transitions, 4666 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 18:51:15,530 INFO L231 Difference]: Finished difference. Result has 172 places, 285 transitions, 3719 flow [2024-06-27 18:51:15,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3719, PETRI_PLACES=172, PETRI_TRANSITIONS=285} [2024-06-27 18:51:15,532 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-27 18:51:15,532 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 285 transitions, 3719 flow [2024-06-27 18:51:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:51:15,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:15,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:51:15,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:51:15,533 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:51:15,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1001097818, now seen corresponding path program 1 times [2024-06-27 18:51:15,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:15,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593493455] [2024-06-27 18:51:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:17,586 INFO 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 18:51:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593493455] [2024-06-27 18:51:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593493455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:17,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:51:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077410084] [2024-06-27 18:51:17,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:17,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:51:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:51:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:51:17,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:17,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 285 transitions, 3719 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:17,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:17,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:17,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:20,028 INFO L124 PetriNetUnfolderBase]: 7273/11037 cut-off events. [2024-06-27 18:51:20,028 INFO L125 PetriNetUnfolderBase]: For 199921/200074 co-relation queries the response was YES. [2024-06-27 18:51:20,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67588 conditions, 11037 events. 7273/11037 cut-off events. For 199921/200074 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67117 event pairs, 1827 based on Foata normal form. 55/10934 useless extension candidates. Maximal degree in co-relation 67507. Up to 9909 conditions per place. [2024-06-27 18:51:20,139 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 264 selfloop transitions, 13 changer transitions 0/308 dead transitions. [2024-06-27 18:51:20,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 308 transitions, 4389 flow [2024-06-27 18:51:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:51:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:51:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 18:51:20,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-27 18:51:20,141 INFO L175 Difference]: Start difference. First operand has 172 places, 285 transitions, 3719 flow. Second operand 5 states and 117 transitions. [2024-06-27 18:51:20,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 308 transitions, 4389 flow [2024-06-27 18:51:20,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 308 transitions, 4290 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:51:20,735 INFO L231 Difference]: Finished difference. Result has 173 places, 289 transitions, 3727 flow [2024-06-27 18:51:20,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3727, PETRI_PLACES=173, PETRI_TRANSITIONS=289} [2024-06-27 18:51:20,736 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 122 predicate places. [2024-06-27 18:51:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 289 transitions, 3727 flow [2024-06-27 18:51:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:20,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:20,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:51:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:51:20,737 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 18:51:20,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1630300745, now seen corresponding path program 1 times [2024-06-27 18:51:20,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521189190] [2024-06-27 18:51:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:24,408 INFO 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 18:51:24,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521189190] [2024-06-27 18:51:24,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521189190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:24,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:24,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796788624] [2024-06-27 18:51:24,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:24,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:24,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:24,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 289 transitions, 3727 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:24,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:24,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:28,951 INFO L124 PetriNetUnfolderBase]: 11486/17160 cut-off events. [2024-06-27 18:51:28,951 INFO L125 PetriNetUnfolderBase]: For 381054/381062 co-relation queries the response was YES. [2024-06-27 18:51:29,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103835 conditions, 17160 events. 11486/17160 cut-off events. For 381054/381062 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 108359 event pairs, 1795 based on Foata normal form. 72/17229 useless extension candidates. Maximal degree in co-relation 103752. Up to 10381 conditions per place. [2024-06-27 18:51:29,139 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 359 selfloop transitions, 74 changer transitions 0/439 dead transitions. [2024-06-27 18:51:29,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 439 transitions, 5842 flow [2024-06-27 18:51:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:51:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:51:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 326 transitions. [2024-06-27 18:51:29,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780141843971631 [2024-06-27 18:51:29,141 INFO L175 Difference]: Start difference. First operand has 173 places, 289 transitions, 3727 flow. Second operand 12 states and 326 transitions. [2024-06-27 18:51:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 439 transitions, 5842 flow [2024-06-27 18:51:29,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 439 transitions, 5763 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 18:51:29,988 INFO L231 Difference]: Finished difference. Result has 184 places, 300 transitions, 4143 flow [2024-06-27 18:51:29,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4143, PETRI_PLACES=184, PETRI_TRANSITIONS=300} [2024-06-27 18:51:29,988 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-27 18:51:29,988 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 300 transitions, 4143 flow [2024-06-27 18:51:29,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:29,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:29,989 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 18:51:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:51:29,989 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 18:51:29,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1541587115, now seen corresponding path program 2 times [2024-06-27 18:51:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094137999] [2024-06-27 18:51:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:33,319 INFO 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 18:51:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094137999] [2024-06-27 18:51:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094137999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:33,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:33,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179523742] [2024-06-27 18:51:33,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:33,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:33,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 300 transitions, 4143 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:37,935 INFO L124 PetriNetUnfolderBase]: 12525/18749 cut-off events. [2024-06-27 18:51:37,936 INFO L125 PetriNetUnfolderBase]: For 443997/444005 co-relation queries the response was YES. [2024-06-27 18:51:38,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115047 conditions, 18749 events. 12525/18749 cut-off events. For 443997/444005 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 120836 event pairs, 3552 based on Foata normal form. 82/18828 useless extension candidates. Maximal degree in co-relation 114961. Up to 15744 conditions per place. [2024-06-27 18:51:38,206 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 331 selfloop transitions, 72 changer transitions 0/409 dead transitions. [2024-06-27 18:51:38,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 409 transitions, 5605 flow [2024-06-27 18:51:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-06-27 18:51:38,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:51:38,209 INFO L175 Difference]: Start difference. First operand has 184 places, 300 transitions, 4143 flow. Second operand 11 states and 286 transitions. [2024-06-27 18:51:38,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 409 transitions, 5605 flow [2024-06-27 18:51:39,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 409 transitions, 5389 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 18:51:39,320 INFO L231 Difference]: Finished difference. Result has 188 places, 303 transitions, 4201 flow [2024-06-27 18:51:39,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4201, PETRI_PLACES=188, PETRI_TRANSITIONS=303} [2024-06-27 18:51:39,321 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-06-27 18:51:39,321 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 303 transitions, 4201 flow [2024-06-27 18:51:39,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:39,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:39,322 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 18:51:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:51:39,322 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 18:51:39,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1541734985, now seen corresponding path program 3 times [2024-06-27 18:51:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:39,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606036483] [2024-06-27 18:51:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:51:43,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:43,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606036483] [2024-06-27 18:51:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606036483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:43,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447006687] [2024-06-27 18:51:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:43,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:43,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 303 transitions, 4201 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:43,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:43,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:48,868 INFO L124 PetriNetUnfolderBase]: 13137/19697 cut-off events. [2024-06-27 18:51:48,868 INFO L125 PetriNetUnfolderBase]: For 419182/419190 co-relation queries the response was YES. [2024-06-27 18:51:48,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115238 conditions, 19697 events. 13137/19697 cut-off events. For 419182/419190 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 128241 event pairs, 3207 based on Foata normal form. 72/19766 useless extension candidates. Maximal degree in co-relation 115150. Up to 13582 conditions per place. [2024-06-27 18:51:49,069 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 346 selfloop transitions, 72 changer transitions 0/424 dead transitions. [2024-06-27 18:51:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 424 transitions, 5925 flow [2024-06-27 18:51:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-27 18:51:49,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562862669245648 [2024-06-27 18:51:49,072 INFO L175 Difference]: Start difference. First operand has 188 places, 303 transitions, 4201 flow. Second operand 11 states and 291 transitions. [2024-06-27 18:51:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 424 transitions, 5925 flow [2024-06-27 18:51:50,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 424 transitions, 5719 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 18:51:50,129 INFO L231 Difference]: Finished difference. Result has 191 places, 310 transitions, 4390 flow [2024-06-27 18:51:50,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4390, PETRI_PLACES=191, PETRI_TRANSITIONS=310} [2024-06-27 18:51:50,130 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 140 predicate places. [2024-06-27 18:51:50,130 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 310 transitions, 4390 flow [2024-06-27 18:51:50,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:50,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:50,131 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 18:51:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:51:50,131 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 18:51:50,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 496437205, now seen corresponding path program 4 times [2024-06-27 18:51:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661806503] [2024-06-27 18:51:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:53,657 INFO 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 18:51:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661806503] [2024-06-27 18:51:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661806503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:53,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:53,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:53,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795163264] [2024-06-27 18:51:53,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:53,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:53,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:53,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:53,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 310 transitions, 4390 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:53,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:53,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:53,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:59,215 INFO L124 PetriNetUnfolderBase]: 14277/21360 cut-off events. [2024-06-27 18:51:59,215 INFO L125 PetriNetUnfolderBase]: For 467012/467017 co-relation queries the response was YES. [2024-06-27 18:51:59,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123567 conditions, 21360 events. 14277/21360 cut-off events. For 467012/467017 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 140936 event pairs, 4077 based on Foata normal form. 76/21432 useless extension candidates. Maximal degree in co-relation 123477. Up to 16338 conditions per place. [2024-06-27 18:51:59,530 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 251 selfloop transitions, 162 changer transitions 0/419 dead transitions. [2024-06-27 18:51:59,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 419 transitions, 5880 flow [2024-06-27 18:51:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-06-27 18:51:59,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783365570599613 [2024-06-27 18:51:59,535 INFO L175 Difference]: Start difference. First operand has 191 places, 310 transitions, 4390 flow. Second operand 11 states and 299 transitions. [2024-06-27 18:51:59,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 419 transitions, 5880 flow [2024-06-27 18:52:00,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 419 transitions, 5698 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 18:52:00,910 INFO L231 Difference]: Finished difference. Result has 195 places, 313 transitions, 4664 flow [2024-06-27 18:52:00,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4664, PETRI_PLACES=195, PETRI_TRANSITIONS=313} [2024-06-27 18:52:00,910 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-27 18:52:00,911 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 313 transitions, 4664 flow [2024-06-27 18:52:00,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:00,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:00,911 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 18:52:00,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:52:00,911 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 18:52:00,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2032439155, now seen corresponding path program 5 times [2024-06-27 18:52:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:00,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068574703] [2024-06-27 18:52:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:04,531 INFO 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 18:52:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068574703] [2024-06-27 18:52:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068574703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:04,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:04,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:52:04,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226538948] [2024-06-27 18:52:04,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:04,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:52:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:52:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:52:04,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:52:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 313 transitions, 4664 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:52:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:10,808 INFO L124 PetriNetUnfolderBase]: 15417/23096 cut-off events. [2024-06-27 18:52:10,808 INFO L125 PetriNetUnfolderBase]: For 510605/510610 co-relation queries the response was YES. [2024-06-27 18:52:10,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133610 conditions, 23096 events. 15417/23096 cut-off events. For 510605/510610 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 154993 event pairs, 4604 based on Foata normal form. 76/23168 useless extension candidates. Maximal degree in co-relation 133518. Up to 18074 conditions per place. [2024-06-27 18:52:11,280 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 274 selfloop transitions, 158 changer transitions 0/438 dead transitions. [2024-06-27 18:52:11,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 438 transitions, 6283 flow [2024-06-27 18:52:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:52:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:52:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2024-06-27 18:52:11,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-06-27 18:52:11,282 INFO L175 Difference]: Start difference. First operand has 195 places, 313 transitions, 4664 flow. Second operand 12 states and 330 transitions. [2024-06-27 18:52:11,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 438 transitions, 6283 flow [2024-06-27 18:52:12,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 438 transitions, 5871 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-27 18:52:12,522 INFO L231 Difference]: Finished difference. Result has 198 places, 316 transitions, 4706 flow [2024-06-27 18:52:12,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4706, PETRI_PLACES=198, PETRI_TRANSITIONS=316} [2024-06-27 18:52:12,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-27 18:52:12,523 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 316 transitions, 4706 flow [2024-06-27 18:52:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:52:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:12,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:52:12,523 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 18:52:12,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2032291285, now seen corresponding path program 6 times [2024-06-27 18:52:12,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75701222] [2024-06-27 18:52:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat